MAX-8
u-blox 8 GNSS modules
Data Sheet
Highlights

High sensitivity of –166 dBm for single GNSS reception

Cost-efficient system

TCXO-based variant for fastest time to first fix

Low power consumption

Superior anti-spoofing and anti-jamming

Pin-compatible with the MAX-7
www.u-blox.com
UBX-16000093 - R02
MAX-8 - Data Sheet
Document Information
Title
MAX-8
Subtitle
u-blox 8 GNSS modules
Document type
Data Sheet
Document number
UBX-16000093
Revision and Date
R02
Document status
Advance Information
25-May-2016
Document status explanation
Objective Specification
Document contains target values. Revised and supplementary data will be published later.
Advance Information
Document contains data based on early testing. Revised and supplementary data will be published later.
Early Production Information
Document contains data from product verification. Revised and supplementary data may be published later.
Production Information
Document contains the final product specification.
This document applies to the following products:
Product name
Type number
ROM/FLASH version
PCN reference
MAX-8C
MAX-8Q
MAX-8C-0-10
MAX-8Q-0-10
ROM SPG 3.01
ROM SPG 3.01
N/A
N/A
u-blox reserves all rights to this document and the information contained herein. Products, names, logos and designs described herein
may in whole or in part be subject to intellectual property rights. Reproduction, use, modification or disclosure to third parties of this
document or any part thereof without the express permission of u-blox is strictly prohibited.
The information contained herein is provided “as is” and u-blox assumes no liability for the use of the information. No warranty, either
express or implied, is given, including but not limited, with respect to the accuracy, correctness, reliability and fitness for a particular
purpose of the information. This document may be revised by u-blox at any time. For most recent documents, visit www.u-blox.com.
Copyright © 2016, u-blox AG.
u-blox® is a registered trademark of u-blox Holding AG in the EU and other countries. ARM ® is the registered trademark of ARM Limited in
the EU and other countries.
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MAX-8 - Data Sheet
Contents
Contents.............................................................................................................................. 3
1
Description .................................................................................................................... 5
1.1
Overview .............................................................................................................................................. 5
1.2
1.3
Product features ................................................................................................................................... 5
GNSS performance ............................................................................................................................... 6
1.4
Block diagram....................................................................................................................................... 7
1.5
Supported GNSS Constellations ............................................................................................................ 7
1.5.1
GPS ............................................................................................................................................... 7
1.5.2
GLONASS ...................................................................................................................................... 7
1.6
Assisted GNSS (A-GNSS) ....................................................................................................................... 7
TM
1.6.1
AssistNow Online ........................................................................................................................ 7
1.6.2
TM
AssistNow Offline ....................................................................................................................... 8
TM
1.6.3
AssistNow Autonomous .............................................................................................................. 8
1.7
Augmentation Systems ......................................................................................................................... 9
1.7.1
Satellite-Based Augmentation System (SBAS) ................................................................................. 9
1.7.2
1.7.3
QZSS ............................................................................................................................................. 9
Differential GPS (D-GPS) ................................................................................................................ 9
1.8
Odometer ............................................................................................................................................. 9
1.9
1.10
Broadcast navigation data and satellite signal measurements................................................................ 9
Geofencing ..................................................................................................................................... 10
1.11
Message Integrity Protection ........................................................................................................... 10
1.12
1.13
Spoofing Detection ......................................................................................................................... 10
EXTINT: External interrupt ............................................................................................................... 10
1.13.1
Pin Control .................................................................................................................................. 10
1.13.2 Aiding ......................................................................................................................................... 10
1.14
TIMEPULSE ...................................................................................................................................... 10
1.15
Protocols and interfaces .................................................................................................................. 11
1.16
Interfaces ........................................................................................................................................ 11
1.16.1 UART........................................................................................................................................... 11
1.16.2
Display Data Channel (DDC) ........................................................................................................ 11
1.17
Clock generation ............................................................................................................................ 11
1.17.1 Oscillators.................................................................................................................................... 11
1.17.2
Real-Time Clock (RTC) ................................................................................................................. 11
1.18
Power management ........................................................................................................................ 12
1.18.1 DC/DC converter ......................................................................................................................... 12
1.18.2
Power Mode Setup ...................................................................................................................... 12
1.18.3
1.18.4
Continuous Mode ....................................................................................................................... 12
Power Save Mode ....................................................................................................................... 12
1.19
1.19.1
Antenna .......................................................................................................................................... 13
Active antenna control (LNA_EN) ................................................................................................ 13
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1.20
2
Pin Definition .............................................................................................................. 14
2.1
3
Configuration management ............................................................................................................ 13
Pin assignment ................................................................................................................................... 14
Electrical specification ................................................................................................ 15
3.1
Absolute maximum rating .................................................................................................................. 15
3.2
3.3
Operating conditions .......................................................................................................................... 16
Indicative current requirements ........................................................................................................... 17
4
Mechanical specifications .......................................................................................... 18
5
Reliability tests and approvals .................................................................................. 19
6
5.1
Reliability tests .................................................................................................................................... 19
5.2
Approvals ........................................................................................................................................... 19
Product handling & soldering .................................................................................... 19
6.1
Packaging ........................................................................................................................................... 19
6.1.1
Reels ........................................................................................................................................... 19
6.1.2
Tapes .......................................................................................................................................... 19
6.2
Shipment, storage and handling ......................................................................................................... 20
6.2.1
Moisture Sensitivity Levels ........................................................................................................... 20
6.2.2
6.2.3
Reflow soldering ......................................................................................................................... 20
ESD handling precautions ............................................................................................................ 21
7
Default messages ....................................................................................................... 22
8
Labeling and ordering information........................................................................... 23
8.1
Product labeling.................................................................................................................................. 23
8.2
8.3
Explanation of codes........................................................................................................................... 23
Ordering codes ................................................................................................................................... 23
Related documents........................................................................................................... 24
Revision history ................................................................................................................ 24
Contact .............................................................................................................................. 25
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1 Description
1.1
Overview
The MAX-8 series of standard precision GNSS modules features the reliable performance of the u-blox 8
positioning engine, which receives GPS, GLONASS, QZSS and SBAS signals. The MAX-8 series delivers high
sensitivity and minimal acquisition times in the ultra compact MAX form factor.
The economical MAX-8 series provides high sensitivity while featuring low power consumption and supporting
advanced Power Save Modes. It also provides message integrity protection, geofencing, spoofing detection, and
odometer functionalities.
The MAX-8C is optimized for cost sensitive applications with lowest power, while the MAX-8Q provides best
performance. The industry proven MAX form factor allows easy migration from MAX-7 and MAX-6 modules by
offering backward compatibility. Sophisticated RF-architecture and interference suppression ensure maximum
performance even in GNSS-hostile environments.
The MAX-8 series combines a high level of integration capability with flexible connectivity options in a miniature
package. This makes it perfectly suited for industrial and mass-market end products with strict size and cost
requirements. The DDC (I2C compliant) interface provides connectivity and enables synergies with most u-blox
cellular modules.
u-blox 8 modules use GNSS chips qualified according to AEC-Q100 and are manufactured in ISO/TS 16949
certified sites. Qualification tests are performed as stipulated in the ISO16750 standard: “Road vehicles –
Environmental conditions and testing for electrical and electronic equipment”. MAX-8Q complies with
green/halogen free standards.
The u-blox MAX-8 modules can also benefit from the u-blox AssistNow assistance service. The Online service
provides GNSS broadcast parameters, such as ephemeris, almanac data, and time, to reduce the receiver’s time
to first fix significantly and improve acquisition sensitivity. The extended validity of AssistNow Offline data (up to
35 days) and AssistNow Autonomous data (up to 3 days) provide faster acquisition after a long off time.
See section 1.6 for more information concerning AssistNow Assistance with the MAX-8 series.
1.2
Product features
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1.3 GNSS performance
Specification
Parameter
Receiver type
72-channel u-blox 8 engine
GPS L1C/A, SBAS L1C/A, QZSS L1C/A, GLONASS L1OF
Accuracy of time pulse
RMS
99%
30 ns
60 ns
Frequency of time pulse
0.25 Hz…10 MHz (configurable)
Operational limits1
Dynamics
4g
Altitude
50,000 m
Velocity
500 m/s
2
Velocity accuracy
0.05 m/s
Heading accuracy2
0.3 degrees
GNSS
3
Horizontal position accuracy
GPS
GLONASS
2.5 m
2.0 m
4.0 m
18 Hz
18 Hz
Cold start
29 s
30 s
Hot start
1s
1s
Autonomous
SBAS
Max navigation update rate4
MAX-8Q
Time-To-First-Fix 5
Aided starts
Sensitivity 7
MAX-8C
Time-To-First-Fix 5
Sensitivity
7
6
2s
2s
Tracking & Navigation
–166 dBm
–166 dBm
Reacquisition
–160 dBm
–156 dBm
Cold start
–148 dBm
–145 dBm
Hot start
–157 dBm
–156 dBm
Cold start
30 s
33 s
Hot start
1s
1s
Aided starts 6
3s
3s
Tracking & Navigation
–164 dBm
–163 dBm
Reacquisition
–159 dBm
–156 dBm
Cold start
–147 dBm
–145 dBm
Hot start
–156 dBm
–155 dBm
Table 1: MAX-8 performance in different GNSS modes (default: single reception of GPS incl. SBAS and QZSS)
1
2
3
4
5
6
7
Assuming Airborne < 4 g platform
50% @ 30 m/s
CEP, 50%, 24 hours static, -130 dBm, > 6 SVs
Rates with SBAS and QZSS enabled for > 98% fix report rate under typical conditions
All satellites at -130 dBm
Dependent on aiding data connection speed and latency
Demonstrated with a good external LNA
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1.4 Block diagram
Figure 1: MAX-8 block diagram
1.5
Supported GNSS Constellations
MAX-8 modules are single GNSS receivers that can receive and track either GPS or GLONASS signals. By default,
the MAX-8 receivers are configured for GPS, including SBAS and QZSS reception.
The augmentation systems: SBAS and QZSS can be enabled only if GPS operation is configured.
1.5.1 GPS
MAX-8 modules are designed to receive and track the L1C/A signals provided at 1575.42 MHz by the Global
Positioning System (GPS). The MAX-8 series can receive and process GPS concurrently with QZSS and SBAS
signals.
1.5.2 GLONASS
MAX-8 modules can receive and process the Russian GLONASS satellite system as an alternative to the US-based
Global Positioning System (GPS). u-blox MAX-8 modules are designed to receive and track the L1OF signals
GLONASS provides at 1602 MHz + k*562.5 kHz, where k is the satellite’s frequency channel number (k = –7,...,
5, 6). The ability to process GLONASS L1OF satellite signals allows design of GLONASS receivers where required
by regulations.
To take advantage of GPS and GLONASS, dedicated hardware preparation must be made during the design-in
phase. See the MAX-8 / MAX-M8 Hardware Integration Manual [1] for u-blox design recommendations.
1.6
Assisted GNSS (A-GNSS)
Supply of aiding information, such as ephemeris, almanac, rough last position and time, will reduce the time to
first fix significantly and improve the acquisition sensitivity. All u-blox G8020 based products support the u-blox
AssistNow Online and AssistNow Offline A-GNSS services, support AssistNow Autonomous, and are OMA SUPL
compliant.
1.6.1 AssistNowTM Online
With AssistNow Online, an internet-connected GNSS device downloads assistance data from u-blox AssistNow
Online Service to the receiver at system start-up. The Multi-GNSS Assistance (MGA) service is an HTTP protocol
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MAX-8 - Data Sheet
based network operator independent service. Supplying assistance information, such as ephemeris, almanac, a
rough last position and time, can reduce the time to first fix significantly and improve the acquisition sensitivity.
The AssistNow Online service provides data for GPS, GLONASS and QZSS.
1.6.2 AssistNowTM Offline
With AssistNow Offline service, users can download long-term orbit data over the Internet at their convenience.
The orbit data must be stored in the memory of the application processor for subsequent down-load to the
MAX-8 module. Thus the function enables a position fix within seconds, even when no network is available.
AssistNow Offline offers augmentation for up to 35 days.
The AssistNow Offline service provides data for GPS and GLONASS.
1.6.3 AssistNowTM Autonomous
AssistNow Autonomous operation provides aiding information without the need for a host or external network
connection. Based on previous broadcast satellite ephemeris data downloaded to and stored by the GNSS
receiver, AssistNow Autonomous automatically generates accurate predictions of satellite orbital data
(“AssistNow Autonomous data”) that is usable for future GNSS position fixes. The concept capitalizes on the
periodic nature of GNSS satellite orbits by capturing strategic ephemeris data at specific times of the day. For
MAX-8 modules, AssistNow Autonomous can calculate GPS-only orbit predictions for up to 3 days.
AssistNow Autonomous benefits are:




Faster fix in situations where GNSS satellite signals are weak
No connectivity required
Compatible with AssistNow Online and Offline (can work stand-alone, or in tandem with these services)
No integration effort; calculations are done in the background, transparent to the user.
For more details on A-GNSS, see the u-blox 8 / u-blox M8 Receiver Description Including Protocol
Specification Error! Reference source not found..
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1.7 Augmentation Systems
1.7.1 Satellite-Based Augmentation System (SBAS)
The MAX-8 modules support reception of SBAS broadcast signals. These systems supplement GPS data with
additional regional or wide area GPS augmentation data. The system broadcasts augmentation data via satellite
and this information can be used by GNSS receivers to improve the resulting precision. SBAS satellites can also
be used as additional signals for ranging (navigation), further enhancing availability. The following SBAS types
are supported: WAAS, EGNOS and MSAS.
For more details see the u-blox 8 / u-blox M8 Receiver Description Including Protocol Specification Error!
Reference source not found..
1.7.2
QZSS
The Quasi-Zenith Satellite System (QZSS) is a regional navigation satellite system that transmits additional GPS
L1C/A signals for the Pacific region covering Japan and Australia. The MAX-8 modules are able to receive and
track these signals concurrently with GPS signals, resulting in better availability especially under challenging
signal conditions, e.g. in urban canyons.
The L1-SAIF signal provided by QZSS is not supported
1.7.3 Differential GPS (D-GPS)
u-blox receivers support Differential-GPS data according to RTCM specification 10402.3 [5]: The use of D-GPS
improves GPS position accuracy. The RTCM implementation supports the following RTCM 2.3 messages:
Message Type
Description
1
2
Differential GPS Corrections
Delta Differential GPS Corrections
3
9
GPS Reference Station Parameters
GPS Partial Correction Set
Table 2: Supported RTCM 2.3 messages
RTCM corrections cannot be used together with SBAS.
For more details see the u-blox 8 / u-blox M8 Receiver Description Including Protocol Specification Error!
Reference source not found..
1.8
Odometer
The odometer provides information on travelled ground distance (in meters) using solely the position and
Doppler-based velocity of the navigation solution. For each computed travelled distance since the last odometer
reset, the odometer estimates a 1-sigma accuracy value. The total cumulative ground distance is maintained and
saved in the BBR memory.
The odometer feature is disabled by default. For more details see the u-blox 8 / u-blox M8 Receiver
Description Including Protocol Specification [2].
1.9
Broadcast navigation data and satellite signal measurements
u-blox 8 receivers can output all the GNSS broadcast data upon reception from tracked satellites. This includes all
the supported GNSS signals plus the augmentation services SBAS and QZSS. The receiver also makes available
the tracked satellite signal information, i.e. raw code phase and Doppler measurements in a form aligned to the
ETSI mobile cellular location services protocol (RRLP) [6]. For more details see the u-blox 8 / u-blox M8 Receiver
Description Including Protocol Specification Error! Reference source not found..
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1.10 Geofencing
The u-blox MAX-8 modules support up to four circular geofencing areas defined on the Earth’s surface using a
2D model. Geofencing is active when at least one geofence is defined. The current status can be found by
polling the receiver.
1.11 Message Integrity Protection
The MAX-8 modules provide a function to prevent a third party interfering with the UBX message stream sent
from receiver to host. The security mechanism essentially ”signs” nominated messages with a following message
containing an md5 generated hash of the nominated message. This message signature is then compared with
one generated by the host to determine if the message data has been altered. The hash algorithm seed can use
one fixed secret ID-key set by eFuse in production or a dynamic ID-key set by host enabling users to detect
“Man-in-the-middle” style attacks.
1.12 Spoofing Detection
Spoofing is a process whereby a malicious third party tries to control the reported position via a “fake” GNSS
broadcast signal. This may result in the form of reporting incorrect position, velocity or time. To combat this, the
MAX-8 modules include anti-spoofing measures to alert the host when signals appear to be suspicious. The
receiver combines a number of checks on the received signals looking for inconsistencies across several
parameters.
This feature does not guarantee detection of all spoofing attacks
1.13 EXTINT: External interrupt
EXTINT is an external interrupt pin with fixed input voltage thresholds with respect to VCC_IO. It can be used
for control of the receiver or for aiding.
For more information on how to implement and configure these features see the u-blox 8 / u-blox M8 Receiver
Description Including Protocol Specification Error! Reference source not found. and the MAX-8 / MAX-M8
Hardware Integration Manual [1].
1.13.1 Pin Control
The pin control feature allows overriding the automatic active/inactive cycle of Power Save Mode. The state of
the receiver can be controlled through the EXTINT pin.
The receiver can also be turned off and sent into Backup Mode using EXTINT when Power Save Mode is not
active.
1.13.2 Aiding
The EXTINT pin can be used to supply time or frequency aiding data to the receiver.
For time aiding, hardware time synchronization can be achieved by connecting an accurate time pulse to the
EXTINT pin.
Frequency aiding can be implemented by connecting a periodic rectangular signal with a frequency up to 500
kHz and arbitrary duty cycle (low/high phase duration must not be shorter than 50 ns) to the EXTINT pin, and
providing the applied frequency value to the receiver using UBX messages.
1.14 TIMEPULSE
A configurable time pulse signal is available with all u-blox MAX modules.
The TIMEPULSE output generates pulse trains synchronized with a GNSS or UTC time grid, with intervals
configurable over a wide frequency range. Thus it may be used as a low frequency time synchronization pulse or
as a high frequency reference signal.
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By default the time pulse signal is configured to 1 pulse per second. For more information see the u-blox 8 /
u-blox M8 Receiver Description Including Protocol Specification Error! Reference source not found..
1.15 Protocols and interfaces
Protocol
Type
NMEA 0183, version 4.0 (V2.1, V2.3 or V4.1 configurable)
UBX
Input/output, ASCII
Input/output, binary, u-blox proprietary
RTCM
Input, message 1, 2, 3, 9
Table 3: Available Protocols
2
All protocols are available on UART and DDC (I C compliant). For specification of the various protocols see the
u-blox-8 / u-blox M8 Receiver Description Including Protocol Specification Error! Reference source not found..
1.16 Interfaces
A number of interfaces are provided either for data communication or memory access. The embedded firmware
uses these interfaces according to their respective protocol specifications.
1.16.1 UART
MAX-8 modules include one UART interface, which can be used for communication to a host. It supports
configurable baud rates. For supported baud rates see the u-blox 8 / u-blox M8 Receiver Description Including
Protocol Specification Error! Reference source not found..
Designs must allow access to the UART and the SAFEBOOT_N function pin for future service and
reconfiguration.
1.16.2 Display Data Channel (DDC)
2
An I C compliant DDC interface is available for communication with an external host CPU or u-blox cellular
modules. The interface can be operated in slave mode only. The DDC protocol and electrical interface are fully
2
compatible with the Fast-Mode of the I C industry standard. Since the maximum SCL clock frequency is 400 kHz,
the maximum transfer rate is 400 kb/s.
2
2
The DDC interface is I C Fast Mode compliant. For timing parameters consult the I C standard.
The maximum bit rate is 400 kb/s. The interface stretches the clock when slowed down while serving
interrupts, so real bit rates may be slightly lower.
1.17 Clock generation
1.17.1 Oscillators
MAX-8 modules are available in Crystal and TCXO versions. The TCXO option allows accelerated weak signal
acquisition, enabling faster start and reacquisition times.
Oscillators used on MAX-8 modules are carefully selected and screened for stability and against frequency
perturbations across the full operating range (–40° to +85°C).
The careful selection and qualification of critical parts, such as GNSS oscillators, has resulted in u-blox modules
being the most reliable positioning modules in the industry, particularly in challenging conditions.
1.17.2 Real-Time Clock (RTC)
The RTC is driven by a 32 kHz oscillator, which makes use of an RTC crystal. If the main supply voltage fails and a
battery is connected to V_BCKP, parts of the receiver switch off, but the RTC still runs providing a timing
reference for the receiver. This operating mode is called Hardware Backup Mode, which enables all relevant data
to be saved in the backup RAM to allow a hot or warm start later.
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With MAX-8C in Hardware Backup Mode, the main oscillator is used as timing reference instead of the 32 kHz
oscillator. MAX-8C applies single crystal mode, where the 26 MHz crystal oscillator can also be used to provide a
frequency reference to the RTC without using an additional crystal for the RTC. This makes MAX-8C a more cost
efficient solution at the expense of a higher backup current.
For more information see the MAX-8 / MAX-M8 Hardware Integration Manual [1]
1.18 Power management
u-blox 8 technology offers a power optimized architecture with built-in autonomous power saving functions to
minimize power consumption at any given time. Furthermore, the receiver can be used in two operating modes:
Continuous mode for best performance or Power Save Mode for optimized power consumption respectively. In
addition, a high efficiency DC/DC converter is integrated to allow low power consumption even for higher main
supply voltages.
1.18.1 DC/DC converter
MAX-8Q and MAX-8C modules integrate a DC/DC converter, allowing reduced power consumption by up to
50%, especially when using a main supply voltage above 2.5 V.
For more information see the MAX-8 / MAX-M8 Hardware Integration Manual [1]
1.18.2 Power Mode Setup
The u-blox MAX-8 modules can be configured to run in either continuous or a choice of Power Save Mode
configurations. A template of power mode settings can be used to easily select typical power mode setups to
cover the majority of users’ requirements.
For specific power saving applications the user has the option to fully configure via the power save mode
configuration. For more information see section 1.18.4.
The u-blox 8 receivers’ power mode setup offers a choice of continuous operation and preset Power Save Mode
Configurations:

Continuous (default) mode for best GNSS performance

Continuous with no compromise in power consumption

A 1 Hz cyclic tracking mode for aggressive power reduction
Choice of 2 or 4 Hz cyclic tracking modes for typical wearable applications

ON/OFF interval mode
1.18.3 Continuous Mode
Continuous Mode uses the acquisition engine at full performance, resulting in the shortest possible TTFF and the
highest sensitivity. The receiver searches for all possible satellites until the almanac is completely downloaded.
The receiver then switches to the tracking engine to lower the power consumption.
Thus, a lower tracking current consumption level will be achieved when:

A valid GNSS position is obtained

The entire almanac has been downloaded

The ephemeris for each satellite in view is valid
1.18.4 Power Save Mode
For power sensitive applications, u-blox 8 receivers provide a Power Save Mode for reduced power consumption.
Power Save Mode provides two dedicated methods, ON/OFF and Cyclic tracking, that reduce average current
consumption in different ways to match the needs of the specific application. These options can be set by using
a specific UBX message.
For more information about power management strategies, see the u-blox 8 / u-blox M8 Receiver
Description Including Protocol Specification Error! Reference source not found..
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1.19 Antenna
8
9
MAX-8 modules are designed for use with passive and active antennas.
Parameter
Specification
Antenna Type
Active Antenna Recommendations
Passive and active antenna
Minimum gain
Maximum gain
Maximum noise figure
15 dB (to compensate signal loss in RF cable)
50 dB
1.5 dB
Table 4: Antenna Specifications for all MAX-8 modules
1.19.1 Active antenna control (LNA_EN)
The LNA_EN Pin can be used to turn on and off an external LNA or an active antenna. This reduces power
consumption in Power Save Mode (Backup mode). This pin is available on the MAX-8C and MAX-8Q modules.
1.20 Configuration management
Configuration settings can be modified with UBX configuration messages. The modified settings remain effective
until power-down or reset. If these settings have been stored in battery-backup RAM, then the modified
configuration will be retained, as long as the backup battery supply is not interrupted.
For more information about configuration management, see the u-blox 8 / u-blox M8 Receiver Description
Including Protocol Specification Error! Reference source not found..
8
9
For integration MAX-8 modules with Cellular products, see the MAX-8 / MAX-M8 Hardware Integration Manual [1]
For information on using active antennas with MAX-8 modules, see the MAX-8 / MAX-M8 Hardware Integration Manual [1].
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2 Pin Definition
2.1 Pin assignment
Figure 2: Pin Assignment
No
Name
PIO 10 Nr.
1
GND
-
2
TXD
6
O
Serial Port
3
RXD
7
I
Serial Port
4
5
TIMEPULSE
EXTINT
11
13
O
I
Time pulse (1PPS)
External Interrupt Pin
6
7
V_BCKP
VCC_IO
-
8
9
VCC
RESET_N
-
I
Supply voltage
RESET_N
10
11
GND
RF_IN
-
I
Ground
GNSS signal input
12
GND
-
13
LNA_EN
16
O
Antenna / External LNA control
14
15
VCC_RF
Reserved
-
-
Output Voltage RF section
Reserved
16
17
SDA
SCL
9
8
I/O
I/O
DDC Data
DDC Clock
18
SAFEBOOT_N
-
I
SAFEBOOT_N (for future service and reconfiguration, leave OPEN)
I/O
Description
Ground
Backup voltage supply
IO Supply Voltage
Ground
Table 5: Pinout
Pins designated Reserved should not be used. For more information about Pinouts see the MAX-8 /
MAX-M8 Hardware Integration Manual [1].
10
Peripheral Input Output
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3 Electrical specification
The limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress
above one or more of the limiting values may cause permanent damage to the device. These are stress
ratings only, and operation of the device at these or at any other conditions above those given in the
Characteristics sections of the specification is not implied. Exposure to these limits for extended periods may
affect device reliability.
Where application information is given, it is advisory only and does not form part of the specification. For
more information see the MAX-8 / MAX-M8 Hardware Integration Manual [1].
3.1
Absolute maximum rating
Parameter
Symbol
Module
Power supply voltage
VCC, VCC_IO
Backup battery voltage
Input pin voltage
DC current trough any digital I/O pin
(except supplies)
Ipin
VCC_RF output current
ICC_RF
All
Input power at RF_IN
Prfin
All
Antenna bias voltage
V_ANT
Antenna bias current
I_ANT
Storage temperature
Min
Max
Units
All
–0.5
3.6
V
V_BCKP
All
–0.5
3.6
V
Vin
All
–0.5
3.6
V
10
mA
100
mA
15
dBm
6
V
100
mA
105
85
°C
°C
Tstg
MAX-8C
MAX-8Q
Condition
source impedance
= 50 , continuous
wave
–40
–40
Table 6: Absolute maximum ratings
Stressing the device beyond the “Absolute Maximum Ratings” may cause permanent damage.
These are stress ratings only. The product is not protected against overvoltage or reversed
voltages. If necessary, voltage spikes exceeding the power supply voltage specification, given in
table above, must be limited to values within the specified boundaries by using appropriate
protection diodes.
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MAX-8 - Data Sheet
3.2
Operating conditions
All specifications are at an ambient temperature of 25°C. Extreme operating temperatures can significantly
impact specification values. Applications operating near the temperature limits should be tested to ensure
the specification.
Parameter
Symbol
Module
Min
Typ
Max
Unit
s
Power supply voltage
VCC, VCC_IO
MAX-8C
1.65
3.0
3.6
V
MAX-8Q
2.7
3.0
3.6
V
1.4
3.6
V
Condition
Backup battery voltage
V_BCKP
All
Backup battery current
I_BCKP
MAX-8Q
15
µA
V_BCKP = 3.0 V,
VCC = 0 V
MAX-8C
100
µA
V_BCKP = 3.0 V,
VCC = 0 V
MAX-8Q
20
µA
VCC = 3.0 V
MAX-8C
105
µA
VCC = 3.0 V
SW backup current
I_SWBCKP
Input pin voltage range
Vin
All
0
VCC_IO
V
Digital IO Pin Low level input
voltage
Vil
All
0
0.2*VCC_IO
V
Digital IO Pin High level input
voltage
Vih
All
0.7*VCC_IO
VCC_IO+0.5
V
Digital IO Pin Low level output
voltage
Vol
All
0.4
V
Iol=4 mA
Digital IO Pin High level output
voltage
Voh
All
V
Ioh=4 mA
Pull-up resistor for RESET_N
(Internal)
Rpu
All
V_ANT antenna bias voltage
V_ANT
2.7
Antenna bias voltage drop
V_ANT_DROP
VCC_RF voltage
VCC_RF
All
VCC_RF output current
ICC_RF
All
Receiver Chain Noise Figure 11
NFtot
All
Operating temperature
Topr
All
VCC_IO - 0.4
11
k
5.5
0.1
VCC - 0.1
IANT < –50 mA
V
ICC_RF =50 mA
V
50
3.5
–40
V
mA
dB
85
°C
Table 7: Operating conditions
Operation beyond the specified operating conditions can affect device reliability.
11
Only valid for the GPS band
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MAX-8 - Data Sheet
3.3
Indicative current requirements
Table 8 lists examples of the total system supply current for a possible application.
Values in Table 8 are provided for customer information only as an example of typical power requirements.
Values are characterized on samples. Actual power requirements can vary depending on FW version used,
external circuitry, number of SVs tracked, signal strength, type of start as well as time, duration and
conditions of test.
Parameter
Max. supply current
12
Symbol
Module
Iccp
All
Icc Acquisition15
Average supply current 13, 14
Typ
Typ
GPS/QZSS/SBAS
GLONASS
Max
Unit
s
Condition
67
mA
Estimated at 3 V
MAX-8C
18
17
mA
Estimated at 3 V
MAX-8Q
19
18
mA
Estimated at 3 V
MAX-8C
16
16
mA
Estimated at 3 V
(Continuous mode,)
MAX-8Q
17
17
mA
Estimated at 3 V
Icc Tracking
MAX-8C
3.8
3.7
mA
Estimated at 3 V
(Power Save mode / 1 Hz)
MAX-8Q
4.7
4.7
mA
Estimated at 3 V
Icc Tracking
Table 8: Indicative power requirements at 3.0 V
For more information about power requirements, see the MAX-8 / MAX-M8 Hardware Integration Manual
[1].
For more information on how to noticeably reduce current consumption, see the Power Management
Application Note [4].
12
Use this figure to dimension maximum current capability of power supply. Measurement of this parameter with 1 Hz bandwidth.
Use this figure to determine required battery capacity.
14
Simulated GNSS constellation using power levels of -130 dBm. VCC= 3.0 V
15
Average current from start-up until the first fix.
13
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MAX-8 - Data Sheet
4 Mechanical specifications
Figure 3: Dimensions
For information about the paste mask and footprint, see the MAX-8 / MAX-M8 Hardware Integration
Manual [1].
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MAX-8 - Data Sheet
5 Reliability tests and approvals
5.1
Reliability tests
All MAX-8 modules are based on AEC-Q100 qualified GNSS chips.
Tests for product family qualifications are according to ISO 16750 "Road vehicles – Environmental conditions
and testing for electrical and electronic equipment”, and appropriate standards.
5.2
Approvals
Products marked with this lead-free symbol on the product label comply with the
"Directive 2002/95/EC of the European Parliament and the Council on the Restriction of
Use of certain Hazardous Substances in Electrical and Electronic Equipment" (RoHS).
All u-blox 8 GNSS modules are RoHS compliant.
6 Product handling & soldering
6.1
Packaging
MAX-8 modules are delivered as hermetically sealed, reeled tapes in order to enable efficient production,
production lot set-up and tear-down. For more information see the u-blox Package Information Guide [3].
6.1.1 Reels
Each reel has 500 MAX-8 GNSS modules . MAX-8 modules are shipped on Reel Type B, as specified in the u-blox
Package Information Guide [3].
6.1.2 Tapes
Figure 4 shows the position and orientation of MAX-8 modules as they are delivered on tape. The dimensions of
the tapes are specified in Figure 5.
Figure 4: Tape and module orientation
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MAX-8 - Data Sheet
Figure 5: MAX-8 Tape dimensions
6.2
Shipment, storage and handling
For more information regarding shipment, storage and handling see the u-blox Package Information Guide [3].
6.2.1 Moisture Sensitivity Levels
The Moisture Sensitivity Level (MSL) relates to the packaging and handling precautions required. MAX-8 modules
are rated at MSL level 4.
For MSL standard see IPC/JEDEC J-STD-020, which can be downloaded from www.jedec.org.
6.2.2 Reflow soldering
Reflow profiles are to be selected according to u-blox recommendations (see the MAX-8 / MAX-M8 Hardware
Integration Manual [1]).
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MAX-8 - Data Sheet
6.2.3 ESD handling precautions
MAX-8 modules are Electrostatic Sensitive Devices (ESD). Observe precautions for handling!
Failure to observe these precautions can result in severe damage to the GNSS receiver!
GNSS receivers are Electrostatic Sensitive Devices (ESD) and require special precautions when handling. Particular
care must be exercised when handling patch antennas, due to the risk of electrostatic charges. In addition to
standard ESD safety practices, the following measures should be taken into account whenever handling the
receiver:

Unless there is a galvanic coupling between the
local GND (i.e. the work table) and the PCB GND,
then the first point of contact when handling the
PCB must always be between the local GND and
PCB GND.

Before mounting an antenna patch, connect
ground of the device

When handling the RF pin, do not come into
contact with any charged capacitors and be
careful when contacting materials that can
develop charges (e.g. patch antenna ~10 pF, coax
cable ~50 to 80 pF/m, soldering iron, …)

To prevent electrostatic discharge through the RF
input, do not touch any exposed antenna area. If
there is any risk that such exposed antenna area is
touched in non ESD protected work area,
implement proper ESD protection measures in the
design.

When soldering RF connectors and patch
antennas to the receiver’s RF pin, make sure to
use an ESD safe soldering iron (tip).
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MAX-8 - Data Sheet
7 Default messages
Interface
Settings
UART Output
9600 Baud, 8 bits, no parity bit, 1 stop bit
Configured to transmit both NMEA and UBX protocols, but only the following NMEA (and no UBX)
messages have been activated at start-up:
GGA, GLL, GSA, GSV, RMC, VTG, TXT
9600 Baud, 8 bits, no parity bit, 1 stop bit, Autobauding disabled
Automatically accepts following protocols without need of explicit configuration:
UBX, NMEA, RTCM
The GNSS receiver supports interleaved UBX and NMEA messages.
Fully compatible with the I2C industry standard, available for communication with an external host CPU or
u-blox cellular modules; operated in slave mode only.
NMEA and UBX are enabled as input messages, only NMEA as output messages
Maximum bit rate 400 kb/s.
1 pulse per second, synchronized at rising edge, pulse length 100 ms
UART Input
DDC
TIMEPULSE
(1Hz Nav)
Table 9: Default messages
Refer to the u-blox 8 / u-blox M8 Receiver Description Including Protocol Specification Error! Reference
source not found. for information about further settings.
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MAX-8 - Data Sheet
8 Labeling and ordering information
8.1 Product labeling
The labeling of u-blox MAX-8 GNSS modules includes important product information. The location of the
product type number is shown in Figure 6.
Figure 6: Location of product type number on MAX-8 module label
8.2 Explanation of codes
Three different product code formats are used. The Product Name is used in documentation such as this data
sheet and identifies all u-blox 8 products, independent of packaging and quality grade. The Ordering Code
includes options and quality, while the Type Number includes the hardware and firmware versions. Table 10
shows the structure of these three different formats.
Format
Structure
Product Name
PPP-TGV
Ordering Code
Type Number
PPP-TGV-N
PPP-TGV-N-XX
Table 10: Product Code Formats
The parts of the product code are explained in Table 11.
Code
Meaning
Example
PPP
Product Family
MAX
TG
V
Product Generation
Variant
8 = u-blox 8
Function set (A-Z), T = Timing, R = DR, etc.
N
Option / Quality Grade
XX
Product Detail
Describes standardized functional element or quality grade
0 = Default variant, A = Automotive
Describes product details or options, such as hardware or software revision, cable length, etc.
Table 11: part identification code
8.3 Ordering codes
Ordering No.
Product
MAX-8C-0
u-blox 8 GNSS LCC Module, Crystal, ROM, 9.7x10.1 mm, 500 pieces/reel
MAX-8Q-0
u-blox 8 GNSS LCC Module, TCXO, ROM, Green, 9.7x10.1 mm, 500 pieces/reel
Table 12: Product ordering codes for professional grade modules
Product changes affecting form, fit or function are documented by u-blox. For a list of Product Change
Notifications (PCNs) see our website.
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MAX-8 - Data Sheet
Related documents
[1]
MAX-8 / MAX-M8 Hardware Integration Manual, Docu. No. UBX-15030059
[2]
u-blox 8 / u-blox M8 Receiver Description Including Protocol Specification (Public version), Doc. No.
UBX-13003221
[3]
u-blox Package Information Guide, Docu. No. UBX-14001652
[4]
[5]
Power Management Application Note, Docu. No. UBX-13005162
RTCM 10402.3 Recommended Standards for Differential GNSS, Ver. 2.3, RTCM AUG. 20, 2001
[6]
Radio Resource LCS Protocol (RRLP), (3GPP TS 44.031 version 11.0.0 Release 11)
For regular updates to u-blox documentation and to receive product change notifications, register on our
homepage (http://www.u-blox.com).
Revision history
Revision
R01
R02
Date
Name
Status / Comments
25-Apr-2016
25-May-2016
ghun
julu
Objective Specification
Advance Information
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MAX-8 - Data Sheet
Contact
For complete contact information visit us at www.u-blox.com
u-blox Offices
North, Central and South America
u-blox America, Inc.
Phone:
+1 703 483 3180
E-mail:
info_us@u-blox.com
Regional Office West Coast:
Phone:
+1 408 573 3640
E-mail:
info_us@u-blox.com
Headquarters
Europe, Middle East, Africa
u-blox AG
Phone:
+41 44 722 74 44
E-mail:
info@u-blox.com
Support: support @u-blox.com
Technical Support:
Phone:
E-mail:
+1 703 483 3185
support @u-blox.com
Asia, Australia, Pacific
u-blox Singapore Pte. Ltd.
Phone:
+65 6734 3811
E-mail:
info_ap@u-blox.com
Support: support_ap@u-blox.com
Regional Office Australia:
Phone:
+61 2 8448 2016
E-mail:
info_anz@u-blox.com
Support: support_ap@u-blox.com
Regional Office China (Beijing):
Phone:
+86 10 68 133 545
E-mail:
info_cn@u-blox.com
Support: support_cn@u-blox.com
Regional Office China (Chongqing):
Phone:
+86 23 6815 1588
E-mail:
info_cn@u-blox.com
Support: support_cn@u-blox.com
Regional Office China (Shanghai):
Phone:
+86 21 6090 4832
E-mail:
info_cn@u-blox.com
Support: support_cn@u-blox.com
Regional Office China (Shenzhen):
Phone:
+86 755 8627 1083
E-mail:
info_cn@u-blox.com
Support: support_cn@u-blox.com
Regional Office India:
Phone:
+91 80 4050 9200
E-mail:
info_in@u-blox.com
Support: support_in@u-blox.com
Regional Office Japan (Osaka):
Phone:
+81 6 6941 3660
E-mail:
info_jp@u-blox.com
Support: support_jp@u-blox.com
Regional Office Japan (Tokyo):
Phone:
+81 3 5775 3850
E-mail:
info_jp@u-blox.com
Support: support_jp@u-blox.com
Regional Office Korea:
Phone:
+82 2 542 0861
E-mail:
info_kr@u-blox.com
Support: support_kr@u-blox.com
Regional Office Taiwan:
Phone:
+886 2 2657 1090
E-mail:
info_tw@u-blox.com
Support: support_tw@u-blox.com
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