MAX9614/MAX9616 Low-Power Single/Dual, Rail-to-Rail Op Amps General Description Features

MAX9614/MAX9616 Low-Power Single/Dual, Rail-to-Rail Op Amps General Description Features
19-5302; Rev 0; 8/10
Low-Power Single/Dual, Rail-to-Rail Op Amps
The MAX9614/MAX9616 are low-power precision op
amps that feature precision MOS inputs.
These devices are ideal for a large number of signal processing applications such as photodiode transimpedance amplifiers and filtering/amplification of a wide
variety of signals in industrial equipment. The devices
also feature excellent RF immunity, making them ideal for
portable applications.
Features
S VCC = 2.5V to 5.5V (-40°C to +125°C)
S Low 100µV (max) VOS
S 1µA Supply Current in Shutdown, 175µA Operating
S Small SC70 Package
S 2.8MHz Bandwidth
S Excellent RF Immunity
The MAX9614/MAX9616 are capable of operating from
a 2.5V to 5.5V supply voltage over the -40NC to +125NC
automotive temperature range.
Both singles and duals are available in tiny SC70 packages. The MAX9614 features an active-low shutdown pin.
Applications
Ordering Information
TEMP
RANGE
PINPACKAGE
TOP
MARK
MAX9614AXT+T
-40NC to
+125NC
6 SC70
+ADL
MAX9616AXA+T
-40NC to
+125NC
8 SC70
+AAE
PART
Notebooks, Portable Media Players
Industrial and Medical Sensors
General Purpose Signal Processing
+Denotes lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
Typical Application Circuit
66.5kI
66.5kI
INPUT
4.7nF
121kI
220pF
VCC
1.21kI
20kI
MAX11613
VCC/2
100nF
ADC
20kI
MAX9614
USING THE MAX9614 OUTPUT AMPLIFIER AS AN ANTI-ALIASING FILTER (CORNER FREQUENCY = 1.3kHz) TO MAXIMIZE NYQUIST BANDWIDTH.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
MAX9614/MAX9616
General Description
MAX9614/MAX9616
Low-Power Single/Dual, Rail-to-Rail Op Amps
ABSOLUTE MAXIMUM RATINGS
IN+, IN-, SHDN, VCC to GND..................................-0.3V to +6V
OUT to GND.................................................-0.3V to VCC + 0.3V
Short-Circuit (GND) Duration, OUT, OUTA, OUTB.................. 5s
Continuous Input Current (any pin).................................. Q20mA
Thermal Limits (Note 1) Multilayer PCB
Continuous Power Dissipation (TA = +70NC)
6-Pin SC70 (derate 3.1mW/NC above +70NC)..............245mW
BJA. ......................................................................326.5NC/W
BJC. .........................................................................115NC/W
8-Pin SC70 (derate 3.1mW/NC above +70NC)..............245mW
BJA. ......................................................................... 326NC/W
BJC. .........................................................................115NC/W
Operating Temperature Range......................... -40NC to +125NC
Junction Temperature......................................................+150NC
Lead Temperature (soldering, 10s).................................+300NC
Soldering Temperature (reflow).......................................+240NC
Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a 4-layer
board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(VCC = VSHDN = 3.3V, VIN+ = VIN- = VCM = GND, RL = 10kI to VCC/2, TA = -40NC to +125NC. Typical values are at TA = +25NC,
unless otherwise noted.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
VCC
- 1.4
V
DC CHARACTERISTICS
Input Voltage Range
VIN+, VIN- Guaranteed by CMRR test
-0.1
17
TA = +25NC
Input Offset Voltage
VOS
TA = -40NC to +125NC, after power-up
autocalibration
165
Input Bias Current (Note 3)
Input Offset Current (Note 3)
VOS - TC
IB
IOS
TA = -40NC to +25°C
TA = +70NC
1
7.5
1
1.55
45
TA = +85NC
135
TA = +125NC
1.55
TA = -40NC to +25°C
TA = +70NC
0.5
TA = +85NC
25
7
CMRR
Open-Loop Gain
AOL
Output Short-Circuit Current
(Note 4)
ISC
Output Voltage Low
VOL
FV/NC
pA
nA
pA
4000
TA = +125NC
Common-Mode Rejection Ratio
FV
750
TA = -40NC to +125NC
Input Offset Voltage Drift
100
VCM = -0.1V to VCC - 1.4V, TA = +25NC
80
VCM = -0.1V to VCC - 1.4V, TA = -40NC to
+125NC
78
95
dB
+0.4V P VOUT P VCC - 0.4V, RL = 10kI
99
115
+0.4V P VOUT P VCC - 0.4V, RL = 600I
93
110
To VCC
275
To GND
75
dB
mA
RL = 10kI
1
11
RL = 600I
11
100
RL = 32I
170
2 _______________________________________________________________________________________
mV
Low-Power Single/Dual, Rail-to-Rail Op Amps
(VCC = VSHDN = 3.3V, VIN+ = VIN- = VCM = GND, RL = 10kI to VCC/2, TA = -40NC to +125NC. Typical values are at TA = +25NC,
unless otherwise noted.) (Note 2)
PARAMETER
Output Voltage High
SYMBOL
VOH
CONDITIONS
MIN
TYP
RL = 10kI
VCC 11
VCC 2
RL = 600I
VCC 100
VCC 30
RL = 32I
VCC 560
f = 10kHz
28
MAX
UNITS
mV
AC CHARACTERISTICS
Input Voltage Noise Density
Input Voltage Noise
en
Total noise 0.1Hz P f P 10Hz
Input Current Noise Density
Gain Bandwidth
In
f = 10kHz
0.1
GBW
Slew Rate
SR
Capacitive Loading
Total Harmonic Distortion
CLOAD
THD
nV/√Hz
FVP-P
5
2.8
fA/√Hz
MHz
1.3
V/Fs
No sustained oscillation
200
pF
f = 10kHz, VOUT = 2VP-P, AV = 1V/V
-85
dB
POWER-SUPPLY CHARACTERISTICS
Power-Supply Range
Power-Supply Rejection Ratio
Quiescent Current
VCC
PSRR
ICC
Shutdown Supply Current
Shutdown Input Low
Shutdown Input High
Output Impedance in Shutdown
Turn-On Time from SHDN
Power-Up Time
Guaranteed by PSRR
2.5
TA = +25NC
85
TA = -40NC to +125NC
83
5.5
106
170
TA = +25NC, per amplifier
dB
255
350
TA = -40NC to +125NC, per amplifier
V
FA
ISHDN
VIL
MAX9614 only
1
FA
MAX9614 only
0.5
V
VIH
MAX9614 only
ROUT_SHDN MAX9614 only
MAX9614 only
tON
tUP
1.4
V
10
MI
20
Fs
10
ms
Note 2:All devices are 100% production tested at TA = +25NC. Temperature limits are guaranteed by design.
Note 3:Guaranteed by design, not production tested.
Note 4:Do not exceeed package thermal dissipation in the Absolute Maximum Ratings section.
_______________________________________________________________________________________ 3
MAX9614/MAX9616
ELECTRICAL CHARACTERISTICS (continued)
Typical Operating Characteristics
(VCC = 3.3V, VIN+ = VIN- = 0V, VCM = VCC/2, RL = 10kI to VCC/2, values are at TA = +25NC, unless otherwise noted.)
OFFSET VOLTAGE
vs. COMMON-MODE VOLTAGE
TA = +85°C
100
50
TA = +25°C
0
30
40
30
20
10
-100
0.5
1.0
1.5
2.0
25
20
15
5
0
0
2.5
0
2.0
1.5
2.5
3.0
3.5
4.0
4.5
5.0
5.5
0
10
20
30
40
50
COMMON-MODE VOLTAGE (V)
SUPPLY VOLTAGE (V)
OFFSET VOLTAGE (µV)
SUPPLY CURRENT vs. SUPPLY VOLTAGE
SUPPLY CURRENT vs. TEMPERATURE
INPUT BIAS CURRENT
vs. COMMON-MODE VOLTAGE
TA = +85°C
150
TA = -40°C
100
200
150
100
MAX9614 toc06
250
1000
TA = +125°C
100
TA = +85°C
10
TA = +25°C
1
50
50
0.1
0
0
0.01
TA = -40°C
3.5
4.0
4.5
5.0
5.5
-25
0
25
50
75
100
125
1.0
1.5
2.0
2.5
COMMON-MODE VOLTAGE (V)
INPUT BIAS CURRENT vs.
COMMON-MODE VOLTAGE
INPUT BIAS CURRENT
vs. TEMPERATURE
POWER-UP TRANSIENT
0.2
0
-0.2
-0.4
-0.6
VCM = 0V
10
VOUT
200mV/div
1
GND
0.1
VCC
2V/div
GND
-0.8
-1.0
1.0
1.5
2.0
2.5
3.0
COMMON-MODE VOLTAGE (V)
3.5
4.0
3.0
MMAX9614-16 toc09
100
INPUT BIAS CURRENT (pA)
0.4
0.5
0.5
TEMPERATURE (°C)
0.6
0
0
SUPPLY VOLTAGE (V)
TA = +25°C
0.8
-50
6.0
TA = 0°C
MAX9614 toc08
1.0
3.0
MAX9614 toc07
2.5
60
10,000
INPUT BIAS CURRENT (pA)
TA = +25°C
MAX9614 toc05
250
RLOAD = NO LOAD
SUPPLY CURRENT (µA)
TA = +125°C
200
300
MAX9614 toc04
300
SUPPLY CURRENT (µA)
35
10
TA = -40°C
-50
-0.5
MAX9614 toc03
50
OCCURANCE (%)
150
OFFSET VOLTAGE HISTOGRAM
40
MAX9614 toc02
TA = +125°C
OFFSET VOLTAGE (µV)
OFFSET VOLTAGE (µV)
200
OFFSET VOLTAGE vs. SUPPLY VOLTAGE
60
MAX9614 toc01
250
INPUT BIAS CURRENT (pA)
MAX9614/MAX9616
Low-Power Single/Dual, Rail-to-Rail Op Amps
0.01
-50
-25
0
25
50
75
100
125
TEMPERATURE (°C)
4 _______________________________________________________________________________________
4ms/div
Low-Power Single/Dual, Rail-to-Rail Op Amps
60
50
40
30
20
10
0
0.01
0.1
1
10
100
60
40
20
0.1
1
10
100
FREQUENCY (kHz)
INPUT CURRENT NOISE vs. FREQUENCY
RECOVERY FROM SHUTDOWN
50
40
30
20
0.15
GND
VCC
2V/div
GND
100k
VIN = 2VP-P
AV = 1V/V
-70
-80
-90
-100
-110
-120
0
100
1k
10k
100k
10
10µs/div
100
-60
-80
3.3
TA = -40°C
3.2
3.1
TA = +25°C
3.0
TA = +85°C
2.9
2.8
2.7
TA = +125°C
2.6
-100
-120
100
1k
FREQUENCY (Hz)
10k
100k
0.18
0.16
OUTPUT LOW VOLTAGE (V)
-40
3.4
MAX9614-16 toc17
VIN = 2VP-P
AV = 1V/V
OUTPUT HIGH VOLTAGE (V)
MAX9614-16 toc16
0
10
100k
10k
OUTPUT LOW VOLTAGE
vs. OUTPUT SINK CURRENT
OUTPUT HIGH VOLTAGE
vs. OUTPUT SOURCE CURRENT
TOTAL HARMONIC DISTORTION
PLUS NOISE
-20
1k
FREQUENCY (Hz)
FREQUENCY (Hz)
0.12
0.10
0.06
0.02
0
10
15
20
25
OUTPUT SOURCE CURRENT (mA)
30
TA = +25°C
0.04
2.4
5
TA = +125°C
0.08
2.5
0
TA = +85°C
0.14
MAX9614-16 toc18
10
TOTAL HARMONIC DISTORTION PLUS NOISE (dB)
10k
TOTAL HARMONIC DISTORTION
-60
TOTAL HARMONIC DISTORTION (dB)
VOUT
200mV/div
1k
FREQUENCY (Hz)
MAX9614-16 toc13
0.20
0.05
60
100
MAX9614-16 toc14
0.10
70
0
1000 10,000
FREQUENCY (kHz)
0.25
80
10
0
0.001 0.01
1000 10,000
0.30
INPUT CURRENT NOISE (fA/√Hz)
80
90
MAX9614 toc15
70
100
100
INPUT VOLTAGE NOISE (nV/√ Hz)
80
MAX9614-16 toc11
90
INPUT VOLTAGE NOISE vs. FREQUENCY
120
POWER-SUPPLY REJECTION RATIO (dB)
MAX9614 toc10
COMMON-MODE REJECTION RATIO (dB)
100
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
MAX9614 toc12
COMMON-MODE REJECTION RATIO
vs. FREQUENCY
TA = -40°C
0
5
10
15
20
25
30
OUTPUT SINK CURRENT (mA)
_______________________________________________________________________________________ 5
MAX9614/MAX9616
Typical Operating Characteristics (continued)
(VCC = 3.3V, VIN+ = VIN- = 0V, VCM = VCC/2, RL = 10kI to VCC/2, values are at TA = +25NC, unless otherwise noted.)
Typical Operating Characteristics (continued)
(VCC = 3.3V, VIN+ = VIN- = 0V, VCM = VCC/2, RL = 10kI to VCC/2, values are at TA = +25NC, unless otherwise noted.)
STABILITY vs. CAPACITIVE AND
RESISTIVE LOAD IN PARALLEL
OPEN-LOOP GAIN vs. FREQUENCY
12
RESISTIVE LOAD (kI)
OPEN-LOOP GAIN (dB)
100
VOUT
1µV/div
14
MAX9614-16 toc20
120
MAX9614 toc19
80
60
40
20
MAX9614 toc21
0.1Hz TO 10Hz NOISE
10
8
6
4
UNSTABLE
2
0
0.001 0.01
STABLE
0.1
1
10
100
1000 10,000
0
0 100 200 300 400 500 600 700 800 900 1000
FREQUENCY (kHz)
MAX9614-16 toc23
MAX9614-16 toc22
80
70
60
STABLE
50
CAPACITIVE LOAD (pF)
100mV STEP RESPONSE
CLOAD = 200pF
STABILITY vs. CAPACITIVE WITH
SERIES ISOLATION RESISTOR
RESISTIVE LOAD (I)
MAX9614/MAX9616
Low-Power Single/Dual, Rail-to-Rail Op Amps
VOUT
50mV/div
GND
40
30
VIN
50mV/div
UNSTABLE
20
10
GND
0
0
200
400
600
800
1000
1200
1µs/div
CAPACITIVE LOAD (pF)
2V STEP RESPONSE
CLOAD = 200pF
VOUT
1V/div
RECOVERY FROM SATURATION
OUTPUT SATURATED TO GND
MAX9614-16 toc25
MAX9614-16 toc24
VOUT
500mV/div
AV = 10V/V
GND
GND
VIN
1V/div
VIN
50mV/div
GND
GND
4µs/div
10µs/div
6 _______________________________________________________________________________________
Low-Power Single/Dual, Rail-to-Rail Op Amps
RECOVERY FROM SATURATION
OUTPUT SATURATED TO VCC
OUTPUT IMPEDANCE vs. FREQUENCY
MAX9614-16 toc26
MAX9614-16 toc27
AV = 10V/V
20
RESISTANCE (I)
VOUT
1V/div
GND
VIN
1V/div
NO PHASE REVERSAL
MAX9614 toc28
25
VIN
1V/div
15
10
VOUT
1V/div
5
GND
0
0
10µs/div
0.1
1
10
100
200µs/div
1000 10,000
FREQUENCY (kHz)
Pin Configuration
TOP VIEW
NOT TO SCALE
+
IN+ 1
+
MAX9614
GND 2
6 VCC
OUTA 1
MAX9616
8 VCC
INA- 2
7 OUTB
INA+ 3
6 INB-
GND 4
5 INB+
5 SHDN
IN- 3
4 OUT
8 SC70
6 SC70
Pin Description
PIN
MAX9614
MAX9616
NAME
FUNCTION
1
—
IN+
—
3
INA+
Positive Input A
—
5
INB+
Positive Input B
Ground
2
4
GND
3
—
IN-
—
2
INA-
Positive Input
Negative Input
Negative Input A
—
6
INB-
Negative Input B
4
—
OUT
Output
—
1
OUTA
Output A
—
7
OUTB
Output B
5
—
Active-Low Shutdown
6
8
SHDN
VCC
Positive Power Supply. Bypass with a 0.1FF capacitor to ground.
_______________________________________________________________________________________ 7
MAX9614/MAX9616
Typical Operating Characteristics (continued)
(VCC = 3.3V, VIN+ = VIN- = 0V, VCM = VCC/2, RL = 10kI to VCC/2, values are at TA = +25NC, unless otherwise noted.)
MAX9614/MAX9616
Low-Power Single/Dual, Rail-to-Rail Op Amps
Detailed Description
The MAX9614/MAX9616 are low-power op amps ideal
for signal processing applications due to the devices’
high precision and CMOS inputs.
The MAX9614 also features a low-power shutdown mode
that greatly reduces quiescent current while the device
is not operational.
The MAX9614/MAX9616 self-calibrate on power-up to eliminate effects of temperature and power-supply variation.
RF Immunity
The MAX9614/MAX9616 feature robust internal EMI filters
that reduce the devices’ susceptibility to high-frequency
RF signals such as from wireless and mobile devices.
This, combined with excellent DC and AC specifications,
makes these devices ideal for a wide variety of portable
audio and sensitive signal-conditioning applications.
Applications Information
Power-Up Autotrim
The MAX9614/MAX9616 feature an automatic power-up
autotrim that self-calibrates the VOS of these devices
to less than 100FV of input offset voltage. The autotrim
sequence takes approximately 10ms to complete, and is
triggered by an internal power-on reset (POR) circuitry.
During this time, the inputs and outputs are put into high
impedance and left unconnected. This self-calibration
feature allows the device to eliminate input offset voltage
effects due to power supply and operating temperature
variation simply by cycling its power.
Take care to ensure that the power supply settles within
0.4ms of power-up after it crosses a POR threshold of
0.5V to ensure that a stable power supply is present
when it steps through its autotrim sequence. If the power
supply glitches below the 0.5V threshold, the POR circuitry reactivates during next power-up.
Shutdown Operation
The MAX9614 features an active-low shutdown mode
that puts both inputs and outputs into a high-impedance
state. In this mode, the quiescent current is less than
1FA. Putting the output in high-impedance allows multiple signal outputs to be multiplexed onto a single output
line without the additional external buffers. The device
does not self-calibrate when exiting shutdown mode,
and retains its power-up trim settings. The device also
instantly recovers from shutdown.
The shutdown logic levels of the device are independent
of supply allowing the shutdown to operate by either a
1.8V or 3.3V microcontroller.
Interfacing with the MAX11613
The MAX9616 dual amplifier’s low power and tiny size
is ideal for driving multichannel analog-to-digital converters (ADCs) such as the MAX11613 (see the Typical
Application Circuit). The MAX11613 is a low-power,
12-bit I2C ADC that measures either four single-ended
or two differential channels in an 8-pin FMAX® package. Operating from a single 3V or 3.3V supply, the
MAX11613 draws a low 380FA supply current when sampling at 10ksps.The MAX11613 family also offers pincompatible 5V ADCs (MAX11612) and 8-bit (MAX11601)
and 10-bit (MAX11607) options.
The MAX9614/MAX9616’s output voltage low is
designed to be especially close to ground—it is only
11mV above ground, allowing maximum dynamic
range in single-supply applications. High output current and capacitance drive capability of the part help
it to be useful in ADC driver and line-driver.
TIME FOR POWER SUPPLY
TO SETTLE
5V
VCC
0.5V
0V
2V
AMPLIFIER AUTOTRIM
VOUT*
0V
0.4
ms
10ms
Figure 1. Autotrim Timing Diagram
µMAX is a registered trademark of Maxim Integrated Products, Inc.
8 _______________________________________________________________________________________
CALIBRATED
AMPLIFIER
ACTIVE
Low-Power Single/Dual, Rail-to-Rail Op Amps
Active Filters
The MAX9614/MAX9616 are ideal for a wide variety
of active filter circuits that make use of their rail-to-rail
output stages and high impedance CMOS inputs. The
Typical Application Circuit shows an example multiple
feedback active filter circuit with a corner frequency
of 1.3kHz. At low frequencies, the amplifier behaves
like a simple low-distortion inverting amplifier of gain =
-1, while its high bandwidth gives excellent stopband
attenuation above its corner frequency. See the Typical
Application Circuit.
Chip Information
PROCESS: BiCMOS
_______________________________________________________________________________________ 9
MAX9614/MAX9616
Input Bias Current
The MAX9614/MAX9616 feature a high-impedance
CMOS input stage and a specialized ESD structure
that allows low input bias current operation at low
input common-mode voltages. Low input bias current
is useful when interfacing with high-ohmic sensors. It
is also beneficial for designing transimpedance amplifiers for photodiode sensors. This makes the MAX9614/
MAX9616 ideal for ground referenced medical and
industrial sensor applications.
Package Information
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the
package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the
package regardless of RoHS status.
PACKAGE TYPE
PACKAGE CODE
OUTLINE No.
LAND PATTERN NO.
6 SC70
X6SN-1
21-0077
90-0189
8 SC70
X8SN-1
21-0460
—
SC70, 6L.EPS
MAX9614/MAX9616
Low-Power Single/Dual, Rail-to-Rail Op Amps
10 �������������������������������������������������������������������������������������
Low-Power Single/Dual, Rail-to-Rail Op Amps
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the
package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the
package regardless of RoHS status.
______________________________________________________________________________________ 11
MAX9614/MAX9616
Package Information (continued)
MAX9614/MAX9616
Low-Power Single/Dual, Rail-to-Rail Op Amps
Revision History
REVISION
NUMBER
REVISION
DATE
0
8/10
DESCRIPTION
Initial release
PAGES
CHANGED
—
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied.
Maxim reserves the right to change the circuitry and specifications without notice at any time.
12
© 2010
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.
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