Size and Cost Optimized Binary Module Reference Design Using Digital Isolator with Integrated Power

(ACTIVE) TIDA-00847

Description & Features

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Key Document

Description

The TIDA-00847 TI design showcases space and cost optimized architecture for a 4 channel DC input binary module  with improved measurement accuracy and status indication using only two TI products simplifying system design. MCU based binary module improves measurement resolution of binary input resulting in improved system performance including accurate and repeatable fault indications and  eliminates the need for multiple hardware versions (use same design for multiple nominal voltage inputs)  reducing design, testing, manufacturing and field support efforts. In this TI design 4 input channels are configured as group isolated inputs to minimize cost per channel. A 10-bit analog-to-digital converter (ADC) measures the DC inputs with in ±3% ±1 V accuracy over wide range. Pre-compliance tests for EMI and EMC have been performed.  

Features
  • Binary input module design based on reinforced isolation  ISOW7841 or ISOW7841F, digital isolator with integrated high efficiency, power converter with soft-start and 75 mA current output (quad with various configurations for GPIO or SPI or UART interface) simplifying system design
  • MSP430G2332 or MSP430FR2111, MCU based 4 channel DC input or 2-channel AC or DC voltage input measurement type binary Input module
  • ISOW7841 provides 46% efficiency with output ripple of 100mV for 70mA load (pkpk)
  • Accuracy <=  ±3% of measured value ±1 V (programming resolution or step size) 
  • Meets pre-compliance tests for  EMI and EMC as per IEC61000-4 and CISPR22 standards

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Bill of Materials (BOM)

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ISOW7841EVM:
ISOW7841 Quad-Channel Digital Isolator With Integrated DC-DC Converter Evaluation Module

$49.00(USD)


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TI Devices (13)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
ISO7741  High-Speed, Low-Power, Robust EMC Quad-Channel Digital Isolator  Isolation  Sample & Buy View Design Kits & Evaluation Modules
ISOW7821  High-Efficiency, Low-Emissions, Reinforced Digital Isolator With Integrated Power  Isolation  Sample & Buy View Design Kits & Evaluation Modules
ISOW7840  High-Efficiency, Low-Emissions, Reinforced Digital Isolator With Integrated Power  Isolation  Sample & Buy View Design Kits & Evaluation Modules
ISOW7841  High-Efficiency, Low-Emissions, Reinforced Digital Isolator With Integrated Power  Isolation  Sample & Buy View Design Kits & Evaluation Modules
ISOW7842  High-Efficiency, Low-Emissions, Reinforced Digital Isolator With Integrated Power  Isolation  Sample & Buy View Design Kits & Evaluation Modules
LMV614  Low voltage, low power, RRIO general purpose amplifier  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules
MSP430FR2111  16 MHz Ultra-Low-Power Microcontroller With 4 KB FRAM, 1 KB SRAM, 12 IO, 8 ch 10-bit ADC  MSP430 ultra-low-power MCUs  Sample & Buy View Design Kits & Evaluation Modules
MSP430G2332  MSP430G2x32, MSP430G2x02 Mixed Signal Microcontroller  MSP430 ultra-low-power MCUs  Sample & Buy View Design Kits & Evaluation Modules
SN6505B  Low-noise 1-A, 420kHz transformer driver for isolated power supplies  Isolation  Sample & Buy View Design Kits & Evaluation Modules
TPS22944  5.5V, 0.2A, 500mΩ, 100mA Current Limit Load Switch  Power switches  Sample & Buy View Design Kits & Evaluation Modules
TPS3808  Low Quiescent Current Supervisor with Programmable-Delay  Power management  Sample & Buy View Design Kits & Evaluation Modules
TPS60241  170 uVrms Zero-Ripple Switched Cap Boost Converter With Fixed 5.0V Output For VCO Supply  DC/DC switching regulators  Sample & Buy View Design Kits & Evaluation Modules
TPS709  150mA 30V Ultra-Low-Iq Wide-Input Low-Dropout (LDO) Regulator With Reverse Current Protection  Power management  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
ISO7741 Download Download
Download Download
ISOW7821 Download Download
ISOW7840 Download Download
ISOW7841 Download Download
ISOW7842 Download Download
LMV614 Download
Download
MSP430FR2111 Download Download
Download -
MSP430G2332 Download Download
Download Download
Download
Download Download
SN6505B Download Download
TPS22944 Download Download
TPS3808 Download Download
Download Download
TPS60241 Download Download
TPS709 Download
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Technical Documents

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.

Datasheet (1)
Title Abstract Type Size (KB) Date Views
PDF 1430 30 Nov 2017
User guides (1)
Title Abstract Type Size (KB) Date Views TI Recommends
PDF 1888 06 Jun 2017 3
Design files (6)
Title Abstract Type Size (KB) Date Views
ZIP 4730 16 Mar 2017 0
ZIP 3475 16 Mar 2017 2
ZIP 3690 16 Mar 2017 0
ZIP 471 16 Mar 2017 0
ZIP 437 16 Mar 2017 0
ZIP 1189 16 Mar 2017 1 1

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