EMC Compliant, Group Isolated, 2-Channel Binary Input Module for Wide AC/DC Input Reference Design

(ACTIVE) TIDA-00809

Description & Features

Technical Documents

Support & Training

Order Now


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

Key Document

Description

The TIDA-00809 TI design showcases a cost optimized architecture that improves resolution of a binary input module. A microcontroller unit (MCU) is shared between two input channels (group isolation) to minimize the cost per channel. Wide input range is covered using an amplifier with gain and a MCU integrated 10-bit analog-to-digital converter (ADC) to measure with in ±3% accuracy. This architecture eliminates the need for multiple hardware versions based on input voltage range as is the case with an opto-coupler based topology. A digital isolator is used to communicate the ADC code or the root-mean-square estimate of the input to the host processor. The design is tested for ESD, EFT and Surge as per IEC61000-4 Level 4.

Features
  • Measurement accuracy: <±3% over a wide input range for AC/ DC input using 10-bit SAR ADC
  • MCU shared between two channels (group isolation) to minimize cost per channel with additional unassigned input channels for larger channel count group isolation
  • Wide input range covered using an amplifier with two gain stages
  • Choice of basic or reinforced isolation between input and the host processor using digital isolator
  • Onboard current pulse generator (20mA-50mA, 50ms) using MCU PWM output to remove the contamination (anti-burnishing) on the binary input contacts

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


  




TI Devices (9)

Order samples, get tools and find more information on the TI products in this reference design.

Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
ISO1541  2.5 kVrms Isolated Unidirectional Clock, Bidirectional I2C Isolators  Isolation  Sample & Buy View Design Kits & Evaluation Modules
ISO7320C  Robust EMC, Low Power, Dual-Channel 2/0 Digital Isolator, Fail-Safe High  Isolation  Sample & Buy View Design Kits & Evaluation Modules
ISO7820  High-Immunity, 5.7kVRMS Reinforced Dual-Channel 2/0 Digital Isolator, 100Mbps  Isolation  Sample & Buy View Design Kits & Evaluation Modules
LM4041B  Adjustable Precision Micropower Shunt Voltage Reference, 0.2% accuracy  Voltage Reference  Sample & Buy Not Available
LMV551  3 MHz, Micropower RRO Amplifier  Operational Amplifiers (Op Amps)  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
MSP430G2332  MSP430G2x32, MSP430G2x02 Mixed Signal Microcontroller  MSP430 ultra-low-power MCUs  Sample & Buy View Design Kits & Evaluation Modules
SN6501  Low-Noise 350 mA, 410 kHz Transformer Driver for Isolated Power Supplies  Isolation  Sample & Buy View Design Kits & Evaluation Modules
TPS709  150-mA, 30-V, Ultra-Low IQ, Wide Input Low-Dropout Regulator with Reverse Current Protection  Linear Regulator (LDO)  Sample & Buy View Design Kits & Evaluation Modules

Technical Documents

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

User guides (1)
Title Abstract Type Size (KB) Date Views TI Recommends
PDF 1349 07 Oct 2016 220
Design files (6)
Title Abstract Type Size (KB) Date Views
ZIP 603 07 Jul 2016 104
ZIP 3252 07 Jul 2016 30
ZIP 971 07 Jul 2016 18
ZIP 291 07 Jul 2016 25
ZIP 224 07 Jul 2016 37
ZIP 616 07 Jul 2016 165


Support & Training

TI E2E Community

As a member of  myTI you can join the TI E2E™ Community  where you can ask questions, share ideas and collaborate with fellow engineers and TI experts

Content is provided "AS IS" by the respective TI and Community contributors and does not constitute TI specifications. See  Terms of use.

Engage in the Community

Blogs

Wikis

Visit the TI Wiki