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Texas Instruments ADS131A04 | Demoboard TIDA-00835

High Accuracy ±0.5% Current and Isolated Voltage Measurement Ref Design Using 24-Bit Delta-Sigma ADC

Overview

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IC revision001

Description

The TIDA-00835 reference design allows for accurate voltage and current measurement using a bipolar input configuration by incorporating a four- channel, 24-bit simultaneously-sampling differential input Delta-Sigma ADC over wide dynamic range. The ADC is configured to measure ±2.5 V bipolar input. The inputs are scaled to ADC measurement range of ±2.5V using a fixed gain amplifier. This AFE chains two ADCs together using a common external clock to expand the number of input channels to eight while simultaneously sampling all of the input channels. By having more measurement channels per module, overall system cost is reduced.

Features

REMARK:~ BOM IS ADDED WITH EVAL BOARD PDF

Data Acquisition

  • Four Channel, Simultaneous-Sampling, 24-BitDelta-Sigma ADS131A04 ADC-Based AFEmeasures Wide Inputs Accurately Within ±0.5%
  • Synchronization Between Two ADCs forExpanding Input Channels (Eight Total)
    • Analog Inputs
  • Current Input Measurement with on-board burdenresistor and External Current Transformer
  • Interfaces to Output of TIDA-00777-Rogowskisensor With Active Hardware Integrator
  • Voltage Measurement Using Potential Divider (replacing conventional PT Potential Transformer orinstrument Transformer ) With Isolation Amplifier (AMC1301 - Reinforced Isolation) or Without Isolation
  • AMC1301 output Compatible With ADC Configuredfor Bipolar (±2.5-V)
    • Provision for ±2.5-V AVDD Power Supply and 3.3-VDVDD Power Supply for Host Interface
    • ADC Reference Configurable to 4 V to Measure±4-V Input in Bipolar Mode to IncreaseDynamic Range (with ±5-V on Board)
    • Interfaces with ARM® Cortex®-M4F BasedLow-Power MCU (MSP432P401R) forProcessing Analog Inputs

Typical applications

  • MCCB
  • Protection Relay
  • Data Terminal Unit
  • Power Quality Analyzers
  • Feeder Terminal Unit

Products

Order Code Data­sheet Downloads Product seriesVinVOut1
(V (DC))
IOut1
(A)
L1
(µH)
NPRI : NSECVT
(V (RMS))
fswitch
(kHz)
∫Udt
(µVs)
Type of InsulationL
(mm)
W
(mm)
H
(mm)
MountPinsRowsGenderTypeIR
(A)
Packaging Samples
750313638
STE LTS IGS WRL CADMID-PPTI Push-Pull Transformers for Texas Instruments 5 V (DC) 5 0.35 340 1:1.3 5000 300 - 620 11 Reinforced 9.14 12.7 7.62 SMT Tape and Reel
61301021121
IGE STE 3D ALT EAG CADWR-PHD 2.54 mm THT Dual Pin Header 12.7 THT 10 Dual Pin Header Board Stacker 3 Bag
Order Code Data­sheet
750313638
61301021121
Samples
Order Code Data­sheet Downloads Product seriesVinVOut1
(V (DC))
IOut1
(A)
L1
(µH)
NPRI : NSECVT
(V (RMS))
fswitch
(kHz)
∫Udt
(µVs)
Type of InsulationL
(mm)
W
(mm)
H
(mm)
MountPinsRowsGenderTypeIR
(A)
Packaging Samples