Automation Controller Design
Analog Devices’ Products
and Signal Chain Solutions for
Automation
Controller Design
Analog Devices Automation Controller Segment Overview
Analog Devices is a leading supplier of industrial precision signal measurement solutions. These solutions are designed into automation controller modules
for PLC and DCS systems in process and manufacturing plants and machinery across a wide range of industries including chemical and pharmaceutical,
hydrocarbon (oil and gas), environmental (waste water and treatment), and automotive. The combination of ADI’s proven system expertise in industrial
applications and a comprehensive portfolio of products with leading performance vs. power and integration makes ADI an essential partner for engineers
designing automation controllers.
Main Challenges and System
Considerations
• High availability systems
• High reliability, longevity of
supply, and lower assembly
and manufacturing costs
• Increasing I/O channel density
and smaller module housing is
driving the need for smaller,
more integrated solutions, with
lower power and enhanced
thermal and power efficiency
• Increasing end market need for
higher levels of functional safety
Automation Controller Applications
Why Choose ADI?
• ADI is a technology leader
in precision converters and
signal processing with a long
history of serving the needs
of industrial customers
• ADI is continually investing in
core technology and application
specific products to meet current
and future industrial needs
• ADI has deep system expertise
and many years’ experience
supporting automation controller
design cycles
• Long product life cycles, superior
reliability, and on time delivery
• Best-in-class signal chain solutions
with the most efficient precision
measurement over a wide range
of module inputs and outputs
www.analog.com
• Analog input temperature module
• Analog input group isolated module
• Analog input channel-to-channel
isolated module
• Analog output group isolated module
• Analog output channel-to-channel
isolated module
| Automation Controller Design
2
Analog Input: Temperature Module
OPTIONAL FIELD SUPPLY
24V NOMINAL
BACKPLANE
24V NOMINAL
DC-TO-DC CONVERTER
DC-TO-DC CONVERTER
LDO
COMMUNICATION
(FIELDBUS)
LDO
POWER
ISOLATION
SEQUENCER
CURRENT SOURCES
RTD
SUPERVISORY
REF
PROFIBUS
THERMOCOUPLE
AMP
MUX
ADC
MCU
DATA
ISOLATION
RS-485
CONTROLLER
CAN
RS-232
INTEGRATED SOLUTION
TEMPERATURE
SENSOR
Analog Input
Part Number
Description
Integrated Solution—Microcontroller
Key Features and Benefits
ADuCM360/
ADuCM361
Low power precision analog microcontroller,
ARM Cortex™-M3 with dual/single Σ-Δ ADCs
• Analog performance
• Dual PGA and 24-bit, 4 kSPS ADCs
• 12 multiplexed analog inputs
• 12-bit DAC
• Digital performance
• 32-bit ARM Cortex-M3 processor
• 128 kB flash, 8 kB SRAM
ADuC7060/
ADuC7061
Low power, precision analog microcontroller,
ARM7TDMI ® with dual Σ-Δ ADCs
•
•
•
•
• Power consumption only 1 mA with core
operating at 500 kHz (both ADCs on, input
buffers off, PGA gain of 4, one SPI port on,
and all timers on)
• Package and temperature
• 48-lead LFCSP (7 mm × 7 mm)
• –40°C to +125°C
•
•
•
•
32 kB flash and 4 kB SRAM
UART, SPI, GPIO, PWM
Nominal supply 2.5 V
Temperature range: –40°C to +125°C
3-channel/6-channel, low noise, low power,
Σ-Δ ADC with on-chip in-amp
• 24-bit (AD7793, AD7794)/
16-bit (AD7792, AD7795)
• Low power: 400 μA
• PGA: gain from 1 to 128
• 4 ppm/°C on-chip reference
•
•
•
•
•
Programmable current sources
Burnout currents
Simultaneous 50 Hz and 60 Hz rejection
4.17 SPS to 400 SPS output data rate
Temperature: –40°C to +105°C
16-/14-bit, 250 kSPS PulSAR® ADC
• Throughput: 250 kSPS
• Pseudo differential analog input range:
0 V to VREF with VREF up to VDD
• INL: ±2 LSB max
• SINAD: 93.5 dB @ 20 kHz
• Supply range: 2.3 V to 5.5 V
Dual 24-bit 8 kSPS Σ-Δ ADCs
8 multiplexed analog inputs
Single 14-bit DAC
ARM7TDMI 16-/32-bit RISC controller
Integrated Solution—ADC
AD7792/AD7793/
AD7794/AD7795
ADC
AD7685/AD7942
Reference
ADR4520/ADR4525/ Ultralow noise, 2 ppm/°C, high accuracy
ADR4530/ADR4533/ voltage reference (2.048 V/2.50 V/3.00 V/
ADR4540/ADR4550 3.30 V/4.096 V/5.00 V)
ADR3412/ADR3420,
ADR3425/ADR3430,
ADR3433/ADR3440,
ADR3450
Low power, 10 ppm/°C CMOS voltage
reference
(1.20 V/2.048 V/2.50 V/3.00 V/3.30 V/
4.096 V/5.00 V)
• Initial accuracy: 0.02% max
• Supply range: 3 V to 15 V
• Temperature coefficient: 2 ppm/°C max
• Temperature range: –40°C to +125°C
• Output noise (0.1 Hz to 10 Hz): 1.25 μV p-p @ • 8-lead SOIC package
VOUT of 2.5 V
• Initial accuracy: 0.1% max
• Temperature coefficient: 8 ppm/°C max
• Output noise (0.1 Hz to 10 Hz): 18 μV p-p @
VOUT of 2.5 V
• Supply range: 2.7 V to 5.5 V
• Temperature range: –40°C to +125°C
• 6-lead SOT-23 package
www.analog.com | 3
Analog Input: Group Isolated Module
OPTIONAL FIELD SUPPLY
24V NOMINAL
BACKPLANE
24V NOMINAL
DC-TO-DC CONVERTER
DC-TO-DC CONVERTER
LDO
COMMUNICATION
(FIELDBUS)
LDO
POWER
ISOLATION
SEQUENCER
SUPERVISORY
REF
VOLTAGE INPUTS
±10V, ±5V, 0V TO 10V,
0V TO 5V
FAULT
PROTECTION
CURRENT INPUTS
4mA TO 20mA, ±20mA
FAULT
PROTECTION
PROFIBUS
MUX
AMP
ADC
MCU
DATA
ISOLATION
CONTROLLER
RS-485
CAN
RS-232
INTEGRATED SOLUTION
HART
MODEM
Analog Input: Channel-to-Channel Isolated Module
BACKPLANE
24V NOMINAL
POWER
ISOLATION
LDO
DC-TO-DC CONVERTER
LDO
HART
MODEM
VOLTAGE INPUT
±10V, ±5V, 0V TO 10V,
0V TO 5V
COMMUNICATION
(FIELDBUS)
REF
FAULT
PROTECTION
AMP
ADC
MCU
DATA
ISOLATION
CURRENT INPUT
4mA TO 20mA, ±20mA
SEQUENCER
SUPERVISORY
INTEGRATED SOLUTION
PROFIBUS
CONTROLLER
POWER
ISOLATION
LDO
RS-485
CAN
RS-232
HART
MODEM
VOLTAGE INPUT
±10V, ±5V, 0V TO 10V,
0V TO 5V
REF
FAULT
PROTECTION
AMP
ADC
MCU
DATA
ISOLATION
CURRENT INPUT
4mA TO 20mA, ±20mA
INTEGRATED SOLUTION
Analog Input
Part Number
Fault Protector
Description
ADG465/ADG468
Single-/octal-channel protector
| Automation Controller Design
4
Key Features and Benefits
• Fault protection up to ±40 V
• Low power dissipation
• Latchup proof construction
Analog Input (continued)
Part Number
HART Modem
Description
AD5700/AD5700-1
Low power HART® modem
Key Features and Benefits
• HART compliant fully integrated FSK modem
• 1.71 V to 5.5 V power supply
• On-chip oscillator (AD5700-1)
• Buffered HART output
• 4 mm × 4 mm, 24-lead LFCSP
• Temperature range: −40°C to +125°C
• Input overvoltage protection, 32 V above and below the
supply rails
• Single-supply operation: 3 V to 30 V
• No phase reversal for input voltage up to ±32 V beyond
the power supply
• Unity gain bandwidth: 800 kHz typ @
VSY = ±15 V
Amplifiers
ADA4096-2/
ADA4096-4
AD8275
30 V, micropower, overvoltage
protection, RRIO dual/quad op amps
G = 0.2, level translation,
16-bit ADC driver
• Rail-to-rail input and output swing
• Translates ±10 V to +4 V
• Low offset drift: 2.5 μV/°C
• Drives 16-bit SAR ADCs
• Rail-to-rail output
• High CMRR: 96 dB
• 8-lead MSOP package
• Low gain drift: 1 ppm/°C
AD8475
• Attenuate and level shift: G = 0.4×, 0.8×
• Suited for driving 18-bit converter up to 4 MSPS
Precision, selectable gain, full
differential funnel amp
• Fully differential or single-ended input/output
• 10 nV/√Hz output noise
• Rail-to-rail output
• 3 ppm/°C gain drift
2-channel/4-channel/8-channel,
4.8 kHz, ultralow noise,
24-bit Σ-Δ ADC with PGA
• 4.7 Hz to 4.8 kHz output data rate
• Offset drift: 5 nV/°C
• PGA: gain from 1 to 128
• Up to 22 noise free bits (gain = 1)
• Gain drift: 1 ppm/°C
ADC
AD7192/AD7193/
AD7194
AD7173-8
AD7176-2
Low power, 8-channel/16-channel,
31.25 kSPS, 24-bit, Σ-Δ ADC
24-bit, 250 kSPS Σ-Δ ADC with
20 µs settling
• Fast and flexible output rate:
1.25 SPS to 31.25 kSPS
• Crosspoint multiplexer (enable system diagnostic)
• 17.5 noise free bits at 31.25 kSPS
• Internal clock and internal 2.5 V,
3.5 ppm/°C reference
• 24 noise free bits at 1.25 SPS
• 6 mm × 6 mm, 40-lead LFCSP
• INL: ±3 ppm/FSR
• Temperature range: −40°C to +105°C
• Fast and flexible output rate—5 SPS to 250 kSPS
• INL: ±2.5 ppm of FSR
• Crosspoint multiplexer (enable system diagnostic)
• Fast settling time—20 µs
• 17 noise free bits at 250 kSPS
• 22 noise free bits at 5 SPS
• Internal clock and internal 2.5 V, 2 ppm/°C
reference
• Throughput: 250 kSPS
• INL: ±2 LSB max
• Pseudo differential analog input range: 0 V to VREF with VREF
up to VDD
• SINAD: 93.5 dB @ 20 kHz
• Temperature range: −40°C to +105°C
AD7685/AD7942
16-/14-bit, 250 kSPS PulSAR® ADC
• Supply range: 2.3 V to 5.5 V
Reference
• Initial accuracy: 0.02% max
ADR4520/ADR4525/ Ultralow noise, 2 ppm/°C, high
ADR4530/ADR4533/ accuracy voltage reference (2.048 V/ • Temperature coefficient: 2 ppm/°C max
ADR4540/ADR4550 2.50 V/3.00 V/3.30 V/4.096 V/5.00 V) • Output noise (0.1 Hz to 10 Hz): 1.25 μV p-p @ VOUT of 2.5 V
ADR3412/ADR3420, Low power, 10 ppm/°C CMOS
ADR3425/ADR3430, voltage reference
ADR3433/ADR3440, (1.20 V/2.048 V/2.50 V/3.00 V/
ADR3450
3.30 V/4.096 V/5.00 V)
• Supply range: 3 V to 15 V
• Temperature range: –40°C to +125°C
• 8-lead SOIC package
• Initial accuracy: 0.1% max
• Supply range: 2.7 V to 5.5 V
• Temperature coefficient: 8 ppm/°C max
• Output noise (0.1 Hz to 10 Hz): 18 μV p-p @ VOUT of 2.5 V
• Temperature range: –40°C to +125°C
• Analog performance
• Power consumption only 1 mA with core
operating at 500 kHz (both ADCs on, input
buffers off, PGA gain of 4, one SPI port on,
and all timers on)
• 6-lead SOT-23 package
Microcontroller
• Dual PGA and 24-bit, 4 kSPS ADCs
ADuCM360/
ADuCM361
• 12 multiplexed analog inputs
Low power precision analog
microcontroller, ARM Cortex-M3 with
• 12-bit DAC
dual/single Σ-Δ ADCs
• Digital performance
• 32-bit ARM Cortex-M3 processor
• 128 kB flash, 8 kB SRAM
• Package and temperature
• 48-lead LFCSP (7 mm × 7 mm)
• –40°C to +125°C
Power Management
ADP2441
36 V, 1 A, synchronous step-down
dc-to-dc regulator
• Wide input voltage range: 4.5 V to 36 V
• Adjustable frequency 300 kHz to 1 MHz
• Adjustable output down to 0.6 V
• Soft start with tracking, power-good pin, and
overcurrent limit protection
• High efficiency up to 94%
• ±1% output voltage accuracy
ADP1720
50 mA, high voltage, micropower
linear regulator
• Wide input voltage range: 4 V to 28 V
• Max output current: 50 mA
• IQ = 74 μA @ 1 mA load
• Low dropout voltage: 275 mV @ 50 mA load
www.analog.com | 5
Analog Output: Group Isolated Module
COMMUNICATION
(FIELDBUS)
BACKPLANE
24V NOMINAL
DC-TO-DC CONVERTER
LDO
SEQUENCER
OPTIONAL FIELD SUPPLY
24V NOMINAL
POWER
ISOLATION
DC-TO-DC CONVERTER
HART
MODEM
LDO
ERROR
AMPLIFIER
SUPERVISORY
PROFIBUS
RS-485
CONTROLLER
CAN
DATA
ISOLATION
AMP
OUTPUT
PROTECTION
AMP
OUTPUT
PROTECTION
VOLTAGE OUTPUTS
±10V, ±5V, 0V TO 10V,
0V TO 5V
AMP
OUTPUT
PROTECTION
CURRENT OUTPUTS
4mA TO 20mA, ±20mA
AMP
OUTPUT
PROTECTION
DAC
RS-232
REF
INTEGRATED SOLUTION
Analog Output: Channel-to-Channel Isolated Module
COMMUNICATION
(FIELDBUS)
BACKPLANE
24V NOMINAL
LDO
DC-TO-DC CONVERTER
LDO
SEQUENCER
POWER
ISOLATION
DATA
ISOLATION
SUPERVISORY
CAN
DAC
AMP
OUTPUT
PROTECTION
VOLTAGE OUTPUT
±10V, ±5V, 0V TO 10V,
0V TO 5V
CURRENT OUTPUT
4mA TO 20mA, ±20mA
INTEGRATED SOLUTION
HART
MODEM
PROFIBUS
RS-485
REF
CONTROLLER
LDO
RS-232
POWER
ISOLATION
DATA
ISOLATION
REF
DAC
AMP
OUTPUT
PROTECTION
VOLTAGE OUTPUT
±10V, ±5V, 0V TO 10V,
0V TO 5V
CURRENT OUTPUT
4mA TO 20mA, ±20mA
INTEGRATED SOLUTION
HART
MODEM
Analog Output
Part Number
HART Modem
Description
AD5700/AD5700-1
Low power HART modem
| Automation Controller Design
6
Key Features and Benefits
• HART compliant fully integrated FSK modem
• 1.71 V to 5.5 V power supply
• On-chip oscillator (AD5700-1)
• Buffered HART output
• 4 mm × 4 mm, 24-lead LFCSP
• Temperature range: −40°C to +125°C
Analog Output (continued)
Part Number
Description
Integrated Output Solution
Key Features and Benefits
• Dynamic power control for thermal
management
• 16-bit (AD5755-1, AD5755) and 12-bit
(AD5735) options
• Quad channel
• Standard industrial voltage and current
output ranges
• ±0.04% FSR max total unadjusted error
(TUE) on voltage outputs
• ±0.05% FSR max total unadjusted error
(TUE) on current outputs
• Current output only versions available
(AD5757/AD5737)
• User programmable offset and gain
• On-chip diagnostics
• On-chip reference (±10 ppm/°C maximum)
• −40°C to +105°C temperature range
• 64-lead LFCSP package (9 mm × 9 mm)
• 16-bit (AD5422) and 12-bit (AD5412) options
• Standard industrial voltage and current
output ranges
• ±0.1% FSR max total unadjusted error (TUE)
on voltage outputs
• ±0.15% FSR max total unadjusted error (TUE)
on current outputs
• Current output only versions available
(AD5420/AD5410)
• On-chip reference (±10 ppm/°C maximum)
• Optional regulated DVCC output
• 40-lead LFCSP package (6 mm × 6 mm)
AD5683R/AD5681R/
Single/dual/quad, 16-/12-bit nano DAC+™
AD5689R/AD5687R/
with 2 ppm/°C on-chip reference
AD5686R/AD5684R
• Single (AD5683R/AD5681R), dual (AD5689R/
AD5687R), or quad (AD5686R/AD5684R) DAC
• 16-/12-bit resolution
• INL: ±2 LSB maximum @ 16 bits
• On-chip 2.5 V, 5 ppm/°C max reference
• Total unadjusted error (TUE): ±0.1% of FSR
max (±0.06% FSR for single)
• Offset error: ±1.5 mV max
• 1.8 V logic compatibility
• 8-lead LFCSP (2 mm × 2 mm) or MSOP
(single)
• 16-lead LFCSP (3 mm × 3 mm) or TSSOP
(dual/quad)
AD5668/AD5648/
AD5628
• Octal DAC: 16-/14-/12-bit resolution
• On-chip 1.25 V/2.5 V, 10 ppm/°C max reference
• 16-lead TSSOP/WLCSP/LFCSP
(4 mm × 4 mm)
AD5755-1/AD5755/ Quad-channel,16-bit, 4 mA to 20 mA and
AD5735/AD5757/
voltage output DAC, dynamic power control,
AD5737
HART connectivity
AD5422/AD5412
Single-channel, 12-/16-bit, current source
and voltage output DAC, HART connectivity
DAC
Octal, 16-/14-/12-bit denseDAC®
with on-chip reference
Reference
ADR4520/ADR4525/ Ultralow noise, 2 ppm/°C, high accuracy
ADR4530/ADR4533/ voltage reference (2.048 V/2.50 V/3.00 V/
ADR4540/ADR4550 3.30 V/4.096 V/5.00 V)
• Supply range: 3 V to 15 V
• Initial accuracy: 0.02% max
• Temperature range: –40°C to +125°C
• Temperature coefficient: 2 ppm/°C max
• Output noise (0.1 Hz to 10 Hz): 1.25 μV p-p @ • 8-lead SOIC package
VOUT of 2.5 V
Low power, 10 ppm/°C CMOS voltage
reference
(1.20 V/2.048 V/2.50 V/3.00 V/3.30 V/
4.096 V/5.00 V)
• Initial accuracy: 0.1% max
• Temperature coefficient: 8 ppm/°C max
• Output noise (0.1 Hz to 10 Hz): 18 μV p-p @
VOUT of 2.5 V
• Supply range: 2.7 V to 5.5 V
• Temperature range: –40°C to +125°C
• 6-lead SOT-23 package
AD5750/AD5751/
AD5748/AD5749
Industrial current/voltage output
driver with programmable ranges
• Standard industrial voltage and current output
ranges (including ±20 mA)
• Current output only version available (AD5749)
• ±0.1% FSR max total unadjusted error (TUE)
on voltage outputs
• ±0.1% FSR max total unadjusted error (TUE)
on current outputs
•
•
•
•
ADA4096-2/
ADA4096-4
30 V, micropower, overvoltage protection,
RRIO dual/quad op amps
• Input overvoltage protection, 32 V above and
below the supply rails
• No phase reversal for input voltage up to
±32 V beyond the power supply
• Single-supply operation: 3 V to 30 V
• Rail-to-rail input and output swing
• Unity gain bandwidth: 800 kHz typ @
VSY = ±15 V
ADP2441
36 V, 1 A, synchronous step-down dc-to-dc
regulator
•
•
•
•
ADP1720
50 mA, high voltage, micropower linear
regulator
• Wide input voltage range: 4 V to 28 V
• IQ = 74 μA @ 1 mA load
ADR3412/ADR3420,
ADR3425/ADR3430,
ADR3433/ADR3440,
ADR3450
Amplifier/Driver
60 V/55 V loop compliance (AD5751, AD5749)
On-chip diagnostics
Temperature range: –40°C to +105°C
32-lead LFCSP package (5 mm × 5 mm)
Power Management
Wide input voltage range: 4.5 V to 36 V
Adjustable output down to 0.6 V
High efficiency up to 94%
±1% output voltage accuracy
• Adjustable frequency 300 kHz to 1 MHz
• Soft start with tracking, power-good pin, and
overcurrent limit protection
• Max output current: 50 mA
• Low dropout voltage: 275 mV @ 50 mA load
www.analog.com | 7
Isolation, Power, and Communication
Analog Devices offers a wide range of supporting products to meet the various isolation, power, and communications requirements
for automation controller design.
Part Number
Description
Key Features and Benefits
Controller
ADSP-BF504/
ADSP-BF504F/
ADSP-BF506F
• 400 MHz (800 MMACS) Blackfin® core
ADSP-BF50x fixed point DSP
• 2 UART, 2 SPI, 2 SPORT, and CAN interfaces
for communications
• 32 MB executable flash
(ADSP-BF504F/ADSP-BF506F)
• True 12-bit, dual SAR ADC (ADSP-BF506F)
Supervisory (www .analog. com /supervisory)
ADM8323
Supervisory circuit
ADM6305
Supervisory circuit
• Windowed watchdog
• 5-lead SOT-23 package
• Manual reset input
• Pretrimmed VCC threshold options
• 5-lead SOT-23 package
• Manual reset input
Data Isolation
• Small package: 20-lead SSOP
• Low voltage I/O: 1.8 V to 5.5 V
• Low dynamic power consumption
• 50 year minimum lifetime at 565 V p-p
ADuM3481
3.75 kV rms quad-channel digital isolator
• 0.3 µA per channel quiescent current
Micropower 2.5 kV rms quad-channel isolator • 148 µA/Mbps per channel typical
dynamic current
• Small package: 16-lead QSOP
ADuM1441
ADuM1401
2.5 kV rms quad-channel isolator
• 16-lead SOIC wide package
• 50 year minimum lifetime at 565 V p-p
ADuM4401
5 kV rms quad-channel digital isolator
• 16-lead SOIC wide package
• 50 year minimum lifetime at 565 V p-p
• 50 year minimum lifetime at 565 V p-p
• Reinforced isolation rating
Power Isolation
ADuM5401
Quad-channel data isolator with integrated
dc-to-dc converter
• isoPower® integrated, isolated dc-to-dc
converter
• Quad dc-to-25 Mbps (NRZ) signal
isolation channels
Quad-channel data with isolated switching
regulators
• Temperature range: −40°C to +105°C
• Regulated adjustable output: 3.3 V to 24 V
• Quad dc-to-25 Mbps (NRZ) signal isolation
channels
• 2 W output power
• 20-lead SSOP package
• Integrated transformer driver
ADuM3471
• 16-lead SOIC package with 7.6 mm creepage
• Temperature range: −40°C to +105°C
• 92% efficiency (no sense resistor required)
ADP1621
Constant frequency, current mode step-up
dc-to-dc controller
• ±1.0% initial accuracy
• Capable of high supply input voltage (> 5.5 V)
with an external NPN or a resistor
• Programmable operating frequency
(100 kHz to 1.5 MHz) with one resistor
• Synchronizable to external clock
Isolated Error Amplifier
ADuM3190
2.5 kV rms isolated error amplifier
• Stable over time and temperature
• Low power operation: < 7 mA total
• 0.5% initial accuracy • Wide supply voltage range: 3 V to 20 V
• 1% accuracy over the full temperature range
• Temperature range: −40°C to +125°C
• Bandwidth: 400 kHz
• 16-lead QSOP package
Power Management
ADP2441
36 V, 1 A, synchronous step-down
dc-to-dc regulator
• Wide input voltage range: 4.5 V to 36 V
• Adjustable frequency 300 kHz to 1 MHz
• Adjustable output down to 0.6 V
• Soft start with tracking, power-good pin, and
overcurrent limit protection
• High efficiency up to 94%
• ±1% output voltage accuracy
• Wide input voltage range: 4.5 V to 15 V
ADP5050/ADP5051/ Integrated power solution with quad buck
ADP5052/ADP5053 regulators
• I2C Interface (ADP5050, ADP5051)
• 200 mA LDO regulator (ADP5050, ADP5052)
• Watchdog timer and reset (ADP5051, ADP5053)
ADP1720
50 mA, high voltage, micropower linear
regulator
| Automation Controller Design
8
• 250 kHz to 1.4 MHz adjustable switching
frequency
• Two programmable 1.2 A/2.5 A/4 A sync buck
regulators with low-side FET driver
• Two 1.2 A sync buck regulators
• Wide input voltage range: 4 V to 28 V
• Max output current: 50 mA
• IQ = 74 μA at 1 mA load
• Low dropout voltage: 275 mV @ 50 mA load
Isolation, Power, and Communication (continued)
Part Number
Description
Key Features and Benefits
PROFIBUS
• 30 Mbps data rate
ADM1486
5 V, high speed, low power, half-duplex
RS-485 PROFIBUS® transceiver
ADM2485/
ADM2486
2.5 kV single isolated, high speed, half-duplex • Integrated oscillator driver for external isolation transformer (ADM2485)
RS-485 transceiver
• Low power 0.8 mA ICC
• 2.1 V min differential output with 54 Ω
termination
• Fully isolated digital interface
• Half-duplex RS-485 transceiver
• 5 V or 3.3 V operation
• 16 Mbps/20 Mbps data rate
(ADM2485/ADM2486)
RS-485
ADM2587E
2.5 kV signal and power isolated, ±15 kV
ESD protected, full-/half-duplex RS-485
transceiver 500 kbps
ADM2482E
2.5 kV signal isolated, ESD protected,
full-/half-duplex RS-485 transceiver with
transformer driver 16 Mbps
ADM2490E
5 kV signal isolated, high speed (16 Mbps),
ESD protected, full-duplex RS-485
• 500 kbps data rate
• 5 V or 3.3 V operation
• Fully Isolated power and data
• ±15 kV ESD protection on RS-485 I/O pins
• Open and Short-circuit, fail-safe
receiver inputs
• 16 Mbps data rate
• ±15 kV ESD protection on RS-485 I/O pins
• Fully isolated digital interface
• 5 V or 3.3 V operation
• Integrated oscillator driver for external
transformer
• Open and Short-circuit, fail-safe
receiver inputs
• 16 Mbps data rate
• 5 V or 3.3 V operation
• Fully isolated digital interface
• Receiver open circuit, fail-safe design
• ±8 kV ESD protection on RS-485 I/O pins
CAN
ADM3051
ADM3052
High speed industrial CAN transceiver with
bus protection for 24 V systems
5 kV rms isolated CAN transceiver with integrated high voltage, bus side, linear regulator
• High speed data rates up to 1 Mbps
• Unpowered nodes do not disturb the bus
• Short-circuit protection on bus pins
• Temperature range: −40°C to +125°C
• Slope control for reduced EMI
• High speed data rates up to 1 Mbps
• Short-circuit protection on bus pins
• Fully isolated digital interface
• Integrated bus miswire protection
• Integrated V+ linear regulator
• Unpowered nodes do not disturb the bus
• Bus side powered by V+ and V−
ADM3053
ADM3054
2.5 kV rms signal and power isolated CAN
transceiver with integrated isolated dc-to-dc
converter
5 kV rms signal isolated high speed CAN
transceiver with bus protection
• High speed data rates up to 1 Mbps
• Slope control for reduced EMI
• Fully isolated power and data
• Unpowered nodes do not disturb the bus
• Short-circuit protection on bus pins
• High speed data rates up to 1 Mbps
• Unpowered nodes do not disturb the bus
• Fully isolated digital interface
• Able to detect loss of power on bus side
• Short-circuit protection on bus pins
• Temperature range: −40°C to +125°C
• 460 kbps data rate
• 15 kV ESD protection on RIN and TOUT pins
RS-232
ADM3251E/
ADM3252E
Isolated single-/dual-channel RS-232 line
driver/receiver
ADM3101E
±15 kV ESD protected, 3.3 V single-channel
RS-232 line driver/receiver
• Fully isolated power and data
• 460 kbps data rate
• 0.1 μF charge pump capacitors
• Single-channel RS-232 line driver/receiver
Wireless Communication
• Ultralow power
ADF7023
High performance, low power, ISM band
FSK/GFSK/OOK/MSK/GMSK transceiver IC
• Frequency bands: 862 MHz to 928 MHz and
431 MHz to 464 MHz
• Flexible firmware programmable system
controller and packet processor
• Data rate supported: 1 kbps to 300 kbps
ADF7242
Low power IEEE 802.15.4/proprietary
GFSK/FSK zero-IF 2.4 GHz transceiver IC
• Frequency range (global ISM band)
2400 MHz to 2483.5 MHz
• Low power consumption
• High sensitivity
• Programmable data rates and modulation
www.analog.com | 9
Circuits from the Lab Reference Designs
Analog Devices Circuits from the Lab® Reference Designs are engineered and tested by our technology and applications experts to ensure both
performance and function. Low cost hardware is available to allow for evaluation and rapid prototyping with several development platforms.
Thorough documentation and design files are provided to ease application understanding and minimize system integration issues.
CN0321: Fully Isolated, Single-Channel Voltage and 4 mA to 20 mA Output with HART
0.1𝛍F
Features and Benefits
10nF
18V TO 30V
AGND
VCC BST
• Voltage and 4 mA to 20 mA output
18𝛍H 5V
• Fully isolated
SW
VIN
ADP2441
4.7𝛍F
73.3k𝛀
32𝛍F
COMP
PGND
• HART connectivity
FB
PGOOD FREQ SS/TRK
10k𝛀
118k𝛀
10nF
RFREQ
180pF
T1
D1
L1
47𝛍H
D2
D3
REGULATED
+15V
COUT1
57𝛍F
COUT2
57𝛍F
L2
UNREGULATED
–15V
VIN
R1
93.1k𝛀
0.1𝛍F
BAS70-04LT1
10𝛍F +
R2
8.06k𝛀
GND1
ADuM3471
VDD1
SPI
LATCH
SCLK
SDIN
SDO
10𝛍F 0.1𝛍F
VREG
0.1𝛍F
GND2
10𝛍F +
0.1𝛍F
0.1𝛍F
AVSS AVDD
VDD2
FB
DVCC
LATCH
SCLK
SDIN
SDO
VIA
VOA
VOB
VIC
VOC
VOD
VID
VDDA
VOC
GND1
GND2
10𝛍F +
0.1𝛍F
AVDD
FAULT
CAP1
BAS70-04LT1
DVCC REFIN
SELECT
IOUT
AD5422
AVDD
CLEAR
5V
22𝛀
4nF
500𝛀
UART
VDDL2
RTS
CD
RXD
VIA
VOA
VIB
VOB
VOC
VIC
VOD
VID
CTRL1
10𝛍F
0.1𝛍F
0.1𝛍F
VDD2
VDDC1
VDDC2
GND1
GND2
D6
VOLTAGE
OUTPUT
≥2k𝛀
26V TVS:
SMBJ26CA
AVDD
AVSS
BAS70-04LT1
AVDD
0.1𝛍F
C1
2.2nF
VCC
TXD
C2
22nF
HART_OUT
RTS
CD
RXD
CTRL2
VDD1
TVS
26V
≤500𝛀
100k𝛀
GND1 (24-LEAD SSOP) GND2
TXD
D5
100𝛀
VOUT
GND CAP2 CCOMP
TVS
26V
22𝛀
+VSENSE
DVCC
ADuM3482
CURRENT
OUTPUT
AVSS
–VSENSE
10𝛍F
VDDL1
AVSS
18𝛀
C3
2.2𝛍F
X2
VIB
VOUT
VFB
D4
X1
ADR02
47𝛍H
REF
1𝛍F
AD5700-1
1.2M𝛀
300pF
150k𝛀
ADC_IP
AGND
0.1𝛍F
DGND
1.2M𝛀
150pF
0.1𝛍F
CN0325 circuit diagram.
For more information on this reference circuit and details on how to order, visit www.analog.com/cn0321.
10 | Automation Controller Design
CN0325: PLC/DCS Universal Analog Input Using Either 4-Pin or 6-Pin Terminal Block
Features and Benefits
AVDD
0.1mF
+15V –15V
D1
R2
ADG442
IOUT1
R9
INA1
S2
R3
S3
R6
R10
R7
S4
2.5V
IN3
IN4
IN1
IN2
R1
DVDD
AD8226
S1
VREF2+
AIN1+
• Fully isolated
–15V +15V
• 16-bit ∑-∆ ADC
VREF2–
AIN1–
24V
AD7795
AIN2+
ADuM3471
5V
ADP2441
P1
R8
IOUT2
CS
CLK
R4
VREF1+
DIN
R11
OUT
VREF1–
CLK, DIN, DOUT
CS_ADT, INT, CT
GND
CS_ADT, INT, CT
AVDD
+15V –15V
0.1𝛍F
R9
INA1
R2
R6
R3
D1
R1
5V (AVDD/DVDD)
ADR441
AIN1+
VREF2+
IOUT1
AD7795
AIN2–
R8
R4
IOUT2
ADuM3471
CS
CLK
VREF1+
DIN
R11
OUT
VREF1–
CS_ADT
–15V +15V
VREF2–
2.5V
R5
AIN2+
D2
2.5V
ADP1720
AIN1–
R13
R12
TO SDP_B
0.1𝛍F
R10
R7
ADuM1311
DVDD
AD8226
ADT7310
2.5V
• 4-pin or 6-pin terminal block
ADP1720
ADR441
AIN2–
D2
ADT7310
5V (AVDD/DVDD)
0.1𝛍F
AVDD
R5
• PLC/DCS universal input module
DVDD
P1
GND
CLK, DIN, DOUT
CN0321 circuit diagram.
For more information on this reference circuit and details on how to order, visit www.analog.com/cn0325.
www.analog.com | 11
Circuits from the Lab Reference Designs for Automation Controllers
Temperature
Reference
Circuit No.
Circuit Description
CN0287
Fully Isolated 4-Channel, Temperature
Measurement Circuit Optimized for
Performance, Robustness, and Low Cost
Functions
Features and Benefits
• 4-channel thermocouple/RTD measurements
Temperature measurement
• Fully isolated
• Input protection
• 3-channel K-type thermocouple measurement system
CN0172
High Accuracy Multichannel Thermocouple
Measurement Solution
• Typical temperature range of –200°C to +1200°C
Temperature measurement
• Highly accurate temperature measurement to 0.25°C
• 16-bit digital temperature sensor used for cold
junction compensation
• Fully isolated input module
CN0066
Fully Isolated Input Module Based on the AD7793
24-Bit Σ-∆ ADC and the ADuM5401 Digital Isolator
Temperature measurement
• 24-bit Σ-∆ ADC
• Single-supply input circuit
• Programmable gain allows detection of small signals
• Typical temperature range of –200°C to +400°C
• T-type thermocouple measurement system
CN0206
Thermocouple Temperature Measurement
System with Less Than 500 μA Current Draw
Temperature measurement
• Low power 500 µA max, and low system noise of
0.2 degrees
• Single-chip solution with programmable gain and cold
junction compensation
• High performance and accuracy
Input
Reference
Circuit No.
Circuit Description
Functions
Features and Benefits
• PLC/DCS universal input module
CN0325
PLC/DCS Universal Analog Input Using
Either 4-Pin or 6-Pin Terminal Block
Low speed input (< 5 kHz)
• 4-pin or 6-pin terminal block
• Fully isolated
• 16-bit Σ-∆ ADC
CN0209
CN0067
CN0201
CN0310
CN0213
CN0225
• Complete analog front end for process control
Software Configurable, Universal Analog Front
End for Industrial and Sensor Data Acquisition
Low speed input (< 5 kHz)
Fully Isolated Input Module Based on the
AD7793 24-Bit Σ-∆ ADC, the ADuM5401 Digital
Isolator, and a High Performance In-Amp
Low speed input (< 5 kHz)
Complete 5 V, Single-Supply, 8-Channel
Multiplexed Data Acquisition System with
PGIA for Industrial Signal Levels
High speed input (> 5 kHz)
Precision 24-Bit, 250 kSPS Single-Supply
∑-∆ ADC System for Industrial Signal Levels
High speed input (> 5 kHz)
A Complete High Performance, High Speed Analog
Front-End Process Control
High speed input (> 5 kHz)
High Impedance, High CMR, ±10 V Analog
Front-End Signal Conditioner for Industrial
Process Control and Automation
• Inputs include RTD, thermocouple, 4 mA to 20 mA, ±10 V
• Easily switch between the various input types
• Industrial control input module
• 4 mA to 20 mA current inputs and unipolar input voltage
• 24-bit of digitally isolated resolution
• Complete 8-channel 16-bit DAS on a single chip
• Industrial signal levels up to ±10 V
• Single supply
• 24-bit, 250 kSPS ADC system
• Industrial signal levels
• Single supply
• Optimized for high precision and high common-mode
rejection ratio (CMRR)
• Industrial signal levels
• Analog front end for ±10 V inputs
High speed input (> 5 kHz)
• High common-mode rejection
• 16-bit resolution
• Board space reduction
(continued next page)
12 | Automation Controller Design
Circuits from the Lab Reference Designs for Automation Controllers (continued)
Output
Reference
Circuit No.
Circuit Description
CN0321
Fully Isolated, Single-Channel Voltage
and 4 mA to 20 mA Output with HART
Fully integrated DAC plus
drivers solutions
5 V Regulator Supplies High Transient Current for
Dynamic Power Controlled DAC
Fully integrated DAC plus
drivers solutions
CN0198
Functions
Features and Benefits
• Voltage and 4 mA to 20 mA output
• Fully isolated
• HART connectivity
• Quad 16-bit 4 mA to 20 mA and
voltage output DAC
• Dynamic power control
• External 5 V regulator
CN0065
16-Bit Fully Isolated Output Module Using the
AD5422 Single Chip Voltage and Current Output DAC
and the ADuM1401 Digital Isolator
Fully integrated DAC plus
drivers solutions
CN0278
Complete 4 mA to 20 mA HART Solution with
Additional Voltage Output Capability
Fully integrated DAC plus
drivers solutions
• Voltage and current output
• 16-bit digitally isolated industrial
control output module
• Complete HART compliant solution
• 4 mA to 20 mA
• Lowest power in industry
• Programmable analog output
CN0203
Flexible PLC and DCS Analog Output Module Only
Using Two Analog Components
Low voltage DAC with
output driver
• 16-bit resolution
• 0.1% error with no missing codes
• Ideal for PLC output modules
• High voltage, up to 44 V output
CN0204
Flexible, High Voltage, High Accuracy, Low Drift PLC/
DCS Analog Output Module
Low voltage DAC with
output driver
• Programmable analog output
• Galvanic isolation from rest of system
• Ideal for PLC and DCS modules
4-Channel, Flexible, Configurable, Voltage and Current
Output Circuit for I/O Card and PLC Applications
Low voltage DAC with
output driver
16-Bit Fully Isolated Voltage Output Module Using the
AD5662 DAC, ADuM1401 Digital Isolator, and External
Amplifiers
Low voltage DAC with discreet
output solution
CN0064
16-Bit Fully Isolated 4 mA to 20 mA Output Module
Using the AD5662 DAC, ADuM1401 Digital Isolator,
and External Amplifiers
Low voltage DAC with discreet
output solution
CN0179
Less Than 200 mA, Low Power,
4 mA to 20 mA, Process Control Current Loop
Low voltage DAC with discreet
output solution
CN0229
CN0063
• Quad-channel current and voltage outputs
• 16-bit resolution for PLC systems
• Digitally isolated from application
• Digitally isolated 16-bit industrial
control output module
• Bipolar output voltage
• 4 mA to 20 mA output module
• Digitally isolated 16-bit industrial
control output module
• Low power 4 mA to 20 mA current loop
• 12-, 14-, or 16-bit digital control
• Use in programmable logic controllers
www.analog.com | 13
Online Tools And Resources
To learn more about products, signal chain solutions, and technical expertise offered by Analog Devices to help engineers meet today’s
automation controller challenges, visit www.analog.com/plc_dcs.
Signal Chain Designer—www.analog.com/signalchaindesigner
Signal Chain Designer™ is an advanced product selection and recommendation toolset, bringing together a powerful search engine, verified product
recommendations, tested application circuits, and integrated Analog Filter Wizard™ and Photodiode Wizard,™ and connects to other Analog Devices
engineering tools to provide an easy to use, one stop circuit builder for design engineers.
ADIsimPower—www.analog.com/adisimpower
ADIsimPower™ is a collection of downloadable Excel spreadsheets that produce complete power
designs optimized to your design goals. Get a schematic, bill of materials, and performance data
customized to your specific needs in minutes.
ADIsimDAC—www.analog.com/adisimdac
The purpose of the ADIsimDAC™ tool is to assist the user with finding Analog Devices DACs and DAC application
circuits. It takes user inputs along with typical parametric data to sort, select, and suggest applicable DACs, system
components, and circuits solutions.
Analog Filter Wizard ­— www.analog.com/filterwizard
This online tool simplifies the filter design process with an intuitive
user interface and easily accessible tutorials and help.
14 | Automation Controller Design
Online Tools And Resources (continued)
To learn more about products, signal chain solutions, and technical expertise offered by Analog Devices to help engineers meet today’s
automation controller challenges, visit www.analog.com/plc_dcs.
Multisim ADC Component Evaluator, ADI Edition—www.analog.com/multisim
The free downloadable version of NI Multisim™ 12.0 is tailored for circuit design with ADI components in a SPICE simulation environment.
Circuits from the Lab Reference Designs
For a complete list of Analog Devices Circuits from the Lab Reference Designs
for field instrument designs, visit www.analog.com/circuits.
EngineerZone® Online Support Community
Find answers to your design questions. Join our engineer community
at ez.analog.com.
Quality, Reliability, and Product Life Cycle
ADI is committed to the establishment and continuous improvement of world class systems and processes aimed at satisfying our customers’
evolving needs.
For information about our quality and reliability program, visit www.analog.com/quality.
For information about product life cycle, visit www.analog.com/product_status_info.
www.analog.com | 15
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I2C refers to a communications protocol originally
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Printed in the U.S.A.
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www.analog.com
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