High-efficiency, low-emission, isolated DC/DC converter-based analog input module reference design
TIDA-010065
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Key Document

Description

This reference design is a simplified architecture for generating an isolated power supply for isolated amplifiers for measuring isolated voltages and currents. A fully integrated DC/DC converter with reinforced isolation operating from a 5-V input with configurable 5-V or 5.4-V output (headroom for low dropout regulator (LDO)) generates the isolated power. Shunts that are interfaced to ±50-mV input range isolation amplifiers configured as channel isolated inputs measure the current. Potential divider output interfaced to ±250-mV or ±12-V input range isolation amplifiers configured as group isolated inputs measure the voltage. The outputs of the isolation amplifiers interface directly to 24-bit delta sigma analog-to-digital converter (ADC) or are scaled to ±10 V using gain amplifiers and interfaced to 16-bit SAR ADC for performance evaluation. On-board digital diagnostics improves reliability and enhances system performance.

Features
  • Generation of high efficiency isolated supply of  5 or 5.4V (LDO head room) from 4.5 to 5.5 V input providing reinforced isolation
  • Measures three group isolated voltage inputs with a range of 3-350V providing pin compatible basic or reinforced isolation and three isolated current inputs from 40mA-12.5A providing reinforced isolation
  • ISO224 with input range of ±12V input range connects directly to low power current transformer output as per IEC 60044-8
  • Measurement of DC voltage and current with 1us fast fault detection comparator path
  • Gain scaling of isolation amplifier output to ADS8588H input range of ±10V using instrumentation, precision or general purpose amplifiers
  • Achieves ±0.2% accuracy for both voltage and current using 16-bit SAR or 24-bit delta-sigma ADC

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Design Files

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TI Devices (61)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
AMC1100  ±250 mV-Input, Low-Cost Basic Isolated Amplifier for Current Sensing  Isolation  Sample & Buy View Design Kits & Evaluation Modules
AMC1200  ±250 mV-Input Basic Isolated Amplifier for Current Sensing  Isolation  Sample & Buy View Design Kits & Evaluation Modules
AMC1300  ±250 mV-input reinforced isolated amplifier with high CMTI for current sensing   Isolation  Sample & Buy View Design Kits & Evaluation Modules
AMC1302  ±50mV-Input High-Precision Reinforced Isolated Amplifier for Current Sensing  Isolation  Sample & Buy View Design Kits & Evaluation Modules
AMC1311  2-V input, reinforced isolated amplifier with high CMTI for voltage sensing  Isolation  Sample & Buy View Design Kits & Evaluation Modules
CD74HC4051  High-speed CMOS 8-channel analog multiplexer & demultiplexer  Switches & multiplexers  Sample & Buy View Design Kits & Evaluation Modules
CSD17571Q2  30V, N ch NexFET MOSFET™, single SON2x2, 29mOhm  MOSFETs  Sample & Buy View Design Kits & Evaluation Modules
CSD18534Q5A  60V, N ch NexFET MOSFET™, single SON5x6, 9.8mOhm  MOSFETs  Sample & Buy View Design Kits & Evaluation Modules
DRV5032  Ultra-Low Power 1.65V to 5.5V Hall Effect Switch  Magnetic sensors  Sample & Buy View Design Kits & Evaluation Modules
INA118  Precision, Low Power Instrumentation Amplifier  Amplifiers  Sample & Buy View Design Kits & Evaluation Modules
INA188  36-V, Zero-Drift, Rail-to-Rail-Out Instrumentation Amplifier  Amplifiers  Sample & Buy View Design Kits & Evaluation Modules
INA301  36V, Low-/High-side, Voltage Output CSA with Comparator  Current sense amplifiers  Sample & Buy View Design Kits & Evaluation Modules
INA333  Low-Power, Zero-Drift, Precision Instrumentation Amplifier  Amplifiers  Sample & Buy View Design Kits & Evaluation Modules
INA821  4.7MHz, 35µV offset, 7nV/√Hz noise, low-power, super beta precision instrumentation amplifier  Amplifiers  Sample & Buy View Design Kits & Evaluation Modules
INA826  Precision, 200-μA Supply Current, 36-V Supply Instrumentation Amplifier  Amplifiers  Sample & Buy View Design Kits & Evaluation Modules
ISO124  High-precision isolation amplifier  Isolation  Sample & Buy Not Available
ISO224  Reinforced isolated amplifier for voltage sensing with ±12-V input  Isolation  Sample & Buy View Design Kits & Evaluation Modules
ISO7720  High-speed, robust EMC reinforced dual-channel digital isolator  Isolation  Sample & Buy View Design Kits & Evaluation Modules
ISO7721  High-speed, robust-EMC reinforced dual-channel digital isolator  Isolation  Sample & Buy View Design Kits & Evaluation Modules
ISO7760  Robust EMC, six-channel, 6/0, reinforced digital isolator  Isolation  Sample & Buy View Design Kits & Evaluation Modules
ISO7761  High-speed, robust-EMC six-channel digital isolator  Isolation  Sample & Buy View Design Kits & Evaluation Modules
ISO7762  High-speed, robust EMC six-channel digital isolator  Isolation  Sample & Buy View Design Kits & Evaluation Modules
LM27762  Low-Noise Positive- and Negative-Output Charge Pump With Integrated LDO  DC/DC switching regulators  Sample & Buy View Design Kits & Evaluation Modules
LM2903  Dual differential comparator, automotive grade  Amplifiers  Sample & Buy Not Available
LM74700-Q1  Low Iq, ideal diode controller  Power switches  Sample & Buy View Design Kits & Evaluation Modules
LMV393  Dual General Purpose Low-Voltage Comparator  Amplifiers  Sample & Buy Not Available
LMZ14201  SIMPLE SWITCHER® 6V to 42V, 1A Power Module in Leaded Surface Mount TO Package  Step-down (buck)  Sample & Buy View Design Kits & Evaluation Modules
LMZ20501  2.7V to 5.5V, 1A High Density Nano Module  Step-down (buck)  Sample & Buy View Design Kits & Evaluation Modules
OPA2171  36V, Low Power, RRO, General Purpose Operational Amplifier in MicroPackages  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules
OPA2180  0.1 uV/°C DRIFT, Low Noise, Rail-to-Rail Output, 36V Zero-Drift Op Amp  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules
OPA2188  0.03µV/°C, 6µV Vos, Low Noise, Rail-to-Rail Output, 36V Zero-Drift Operational Amplifier  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules
OPA2277  10µV, 0.1µV/˚C, High-Precision, Low-Power Operational Amplifier  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules
OPA2990  40-V, dual 1MHz, rail-to-rail input/output, low-offset-voltage, low-power op amp  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules
REF3425  2.5-V low-drift low-power small-footprint series voltage reference  Voltage references  Sample & Buy View Design Kits & Evaluation Modules
REF3450  5-V low-drift low-power small-footprint series voltage reference  Voltage references  Sample & Buy Not Available
SN6501  Low-noise, 350-mA, 410-kHz transformer driver for isolated power supplies  Isolation  Sample & Buy View Design Kits & Evaluation Modules
SN6505A  Low-noise 1-A, 160-kHz transformer driver for isolated power supplies  Isolation  Sample & Buy View Design Kits & Evaluation Modules
SN6505B  Low-noise 1-A, 420-kHz transformer driver for isolated power supplies  Isolation  Sample & Buy View Design Kits & Evaluation Modules
SN74LVC1G08  Single 2-Input Positive-AND Gate  Gate  Sample & Buy View Design Kits & Evaluation Modules
SN74LVC1G125  Single Bus Buffer Gate With 3-State Outputs  Buffer/driver  Sample & Buy View Design Kits & Evaluation Modules
SN74LVC1G14  Single Schmitt-Trigger Inverter  Buffer/driver  Sample & Buy View Design Kits & Evaluation Modules
SN74LVC1G17  Single Schmitt-Trigger Buffer  Buffer/driver  Sample & Buy View Design Kits & Evaluation Modules
SN74LVC1G32  Single 2-Input Positive-OR Gate  Gate  Sample & Buy View Design Kits & Evaluation Modules
SN74LVC2G34  Dual Buffer Gate  Buffer/driver  Sample & Buy View Design Kits & Evaluation Modules
TLV1117LV  1-A, Positive Fixed Voltage, Low-Dropout Regulator  Power management  Sample & Buy View Design Kits & Evaluation Modules
TLV3202  Dual, 40ns, microPower, Rail-to-Rail input Comparator with Push-pull outputs  Amplifiers  Sample & Buy Not Available
TLV6001  1-MHz, Low-Power Operational Amplifier for Cost-Sensitive Systems  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules
TLV704  24V Input Voltage, 150mA, Ultra-Low-Iq Low-Dropout (LDO) Regulators  Power management  Sample & Buy View Design Kits & Evaluation Modules
TLV9061  World's Smallest Amp 10MHz, RRIO, 1.8V-5.5V op-amp delivers high performance for challenging systems  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules
TLV9062  10-MHz, low-noise, RRIO, CMOS operational amplifier for cost-sensitive systems  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules
TMP235  ±2°C Analog output temperature sensor, with 10mV /°C gain  Temperature sensors  Sample & Buy View Design Kits & Evaluation Modules
TMP300  Resistor-Programmable, up to 18V-Capable Temp Switch and Analog Out Sensor  Temperature sensors  Sample & Buy Not Available
TPS22944  5.5V, 0.2A, 500mΩ, 100mA Current Limit Load Switch  Power switches  Sample & Buy View Design Kits & Evaluation Modules
TPS2662  60V 800mA Industrial eFuse With Integrated Reverse Polarity Protection  Power switches  Sample & Buy View Design Kits & Evaluation Modules
TPS3897  Single-Channel Ultra-Small Adjustable Supervisory Circuit With Active-High Open-Drain Output  Power management  Sample & Buy View Design Kits & Evaluation Modules
TPS65131  Split-Rail Converter with Dual, Positive and Negative Outputs (750mA typ)  Power management  Sample & Buy View Design Kits & Evaluation Modules
TPS709  150-mA 30-V ultra-low-IQ wide-input low-dropout (LDO) regulator with reverse current protection  Power management  Sample & Buy View Design Kits & Evaluation Modules
TPS763  Low-power low-IQ 150-mA low-dropout (LDO) linear regulator  Power management  Sample & Buy View Design Kits & Evaluation Modules
TPS7A39  Dual, 150mA, Wide-Vin, Positive and Negative Low-Dropout (LDO) Voltage Regulator  Power management  Sample & Buy View Design Kits & Evaluation Modules
TVS3300  33V Flat-Clamp Surge Protection Device  Circuit protection  Sample & Buy View Design Kits & Evaluation Modules
UCC12050  500 mW, high-efficiency, 5 kVRMS isolated DC-DC converter  Offline & isolated DC/DC controllers & converters  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
AMC1100 Download
Download
AMC1200 Download Download
Download
AMC1300 Download
AMC1302 Download
AMC1311 Download Download
CD74HC4051 Download Download
Download Download
Download Download
Download Download
CSD17571Q2 WSON (DQK)| 6 Download Download
CSD18534Q5A VSONP (DQJ)| 8 Download
DRV5032 Download Download
Download Download
INA118 Download Download
Download Download
INA188 Download Download
INA301 Download Download
INA333 Download Download
Download -
INA821 Download Download
Download
INA826 Download Download
Download Download
Download -
ISO124 Download Download
Download -
ISO224 Download
ISO7720 Download Download
Download
Download Download
ISO7721 Download Download
Download Download
Download Download
ISO7760 Download Download
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ISO7761 Download Download
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ISO7762 Download Download
Download Download
LM27762 Download Download
LM2903 Download Download
Download Download
Download Download
Download -
Download Download
LM74700-Q1 Download -
LMV393 Download Download
Download Download
Download Download
LMZ14201 Download Download
LMZ20501 uSiP (SIL)| 8 Download Download
OPA2171 Download Download
Download Download
Download Download
OPA2180 Download Download
Download Download
OPA2188 Download Download
Download Download
OPA2277 Download -
Download Download
Download Download
OPA2990 Download
Download
Download
Download
REF3425 Download Download
REF3450 Download Download
SN6501 Download Download
SN6505A Download Download
SN6505B Download Download
SN74LVC1G08 Download Download
Download Download
Download
Download Download
Download -
Download Download
Download Download
SN74LVC1G125 Download Download
Download Download
Download
Download Download
Download -
Download Download
Download Download
SN74LVC1G14 Download -
Download -
Download Download
Download Download
Download
Download Download
Download -
Download Download
Download Download
SN74LVC1G17 Download -
Download -
Download Download
Download Download
Download
Download Download
Download Download
Download Download
SN74LVC1G32 Download Download
Download Download
Download
Download Download
Download -
Download Download
Download Download
SN74LVC2G34 Download Download
Download Download
Download Download
Download -
TLV1117LV Download Download
TLV3202 Download
Download
TLV6001 Download
Download
TLV704 Download Download
TLV9061 Download
Download Download
Download
TLV9062 Download Download
Download
Download Download
Download Download
Download Download
Download Download
Download
TMP235 Download
Download
TMP300 Download Download
Download Download
TPS22944 Download Download
TPS2662 Download -
TPS3897 Download Download
TPS65131 Download Download
TPS709 Download
Download
TPS763 Download
TPS7A39 Download Download
TVS3300 Download
UCC12050 SO-MOD (DVE)| 16 Download Download

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Technical Documents

See the Important Notice and Disclaimer covering reference designs and other TI resources.

Datasheet (1)
Title Type Size (KB) Date
PDF 740 05 Dec 2019
User guides (1)
Title Type Size (KB) Date
PDF 988 25 Sep 2019
Design files (6)
Title Type Size (KB) Date
ZIP 1179 25 Sep 2019
ZIP 6440 25 Sep 2019
ZIP 3172 25 Sep 2019
ZIP 1005 25 Sep 2019
ZIP 376 25 Sep 2019
ZIP 1281 25 Sep 2019
Related Tools & Software

Reference Designs  ( 3 )

Design Kits & Evaluation Modules  ( 5 )

Name Part Number Tool Type
ADS131A04 evaluation module  ADS131A04EVM  Evaluation Modules & Boards 
ADS131E08 performance demonstration kit  ADS131E08EVM-PDK  Evaluation Modules & Boards 
ADS131M04 24-bit 32-kSPS 4-channel simultaneous-sampling delta-sigma ADC evaluation module  ADS131M04EVM  Evaluation Modules & Boards 
ADS8588S 16-Bit High-Speed 8-Ch Simultaneous-Sampling ADC EVM Performance Demonstration Kit (PDK)  ADS8588SEVM-PDK  Evaluation Modules & Boards 
ADS8688 Performance Demonstration Kit  ADS8688EVM-PDK  Evaluation Modules & Boards 

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