High Resolution, Fast Startup Analog Front End for Air Circuit Breaker Reference Design TIDA-00661 (ACTIVE)

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Key Document

Description

The TIDA-00661 reference design features signal processing front-end subsystem for electronic trip units (ETU) used in air circuit breakers (ACB) or molded case circuit breakers (MCCB). This subsystem consists of Delta-Sigma ADC with 24-Bit resolution and fast startup (< 3ms), ±2.5V regulator, FRAM-based microcontroller (MCU) for interfacing to ADC and processing the inputs. The subsystem is designed to start-up, compute full-cycle RMS current, make decisions, and provide trip signal to the solenoid within 30 ms.

Features
  • Measurement of AC input from 10V to 750V and 50mA to 25A within ±1% with fixed gain
  • Voltage and Current inputs are interfaced to a 24-Bit Delta-Sigma ADC with Fast startup (< 3ms)
  • DC-DC converters configured in Fly-Buck configuration to generate supply output (2W/ 8W)
  • Provides option to measure 3 earth fault current inputs with a single gain opamp interfaced to 12-Bit internal ADC of MCU
  • On-Board potential divider provided to measure the AC input voltage and Burden resistors are provided to connect external CT secondary input for current measurement
  • Regulators generate 3.3V and 5V (MCU and ADC board), ±2.5V and 3V (ADC analog supply)

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TI Devices (11)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
ADS131E08S  24-bit 64-kSPS 8-ch simultaneous delta-sigma ADC with fast start-up for monitoring and protection  Analog-to-digital converters (ADCs)  Sample & Buy View Design Kits & Evaluation Modules
LM2903  Dual differential comparator, automotive grade  Amplifiers  Sample & Buy Not Available
LM4041B  Adjustable precision micropower shunt voltage reference with 0.2% accuracy  Voltage references  Sample & Buy Not Available
LM5017  7.5-100V Wide Vin, 600mA Constant On-Time Synchronous Buck Regulator  Offline & isolated DC/DC controllers & converters  Sample & Buy View Design Kits & Evaluation Modules
LM5160  LM5160 wide input 65V, 2A synchronous buck/Fly-Buck™ converter  Offline & isolated DC/DC controllers & converters  Sample & Buy View Design Kits & Evaluation Modules
LM8364  Active Low Voltage Monitor with Low Quiescent Current and 2.5% Threshold Accuracy  Power management  Sample & Buy Not Available
LMT87  2.7V-Capable, 10 uA Analog Output Temperature Sensor in SC70 and TO-92  Temperature sensors  Sample & Buy View Design Kits & Evaluation Modules
LMV614  Quad low voltage, low power, RRIO general purpose amplifier  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules
MSP430FR5969  MSP430FR5969 16 MHz Ultra-Low-Power Microcontroller featuring 64 KB FRAM, 2 KB SRAM, 40 IO  Microcontrollers (MCU)  Sample & Buy View Design Kits & Evaluation Modules
TPS723  200mA Negative-Output Low-Dropout (LDO) Linear Regulator  Power management  Sample & Buy Not Available
TPS732  Cap-Free, NMOS, 250mA Low Dropout 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)
ADS131E08S Download
LM2903 Download Download
Download Download
Download Download
Download -
Download Download
LM4041B Download Download
Download -
Download Download
LM5017 Download Download
Download Download
LM5160 Download Download
Download -
LM8364 Download Download
LMT87 Download Download
Download
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LMV614 Download
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MSP430FR5969 Download Download
TPS723 Download Download
TPS732 Download
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Technical Documents

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User guides (2)
Title Type Size (KB) Date
PDF 3740 09 Sep 2016
PDF 3202 20 Jul 2015
Design files (6)
Title Type Size (KB) Date
ZIP 660 14 Dec 2015
ZIP 9909 14 Dec 2015
ZIP 2825 14 Dec 2015
ZIP 625 14 Dec 2015
ZIP 504 14 Dec 2015
ZIP 1380 14 Dec 2015
Related Tools & Software

Reference Designs  ( 1 )


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