Texas Instruments SN6501 | Demoboard TIDA-00738

Description

The TIDA-00738 TI design demonstrates a unique approach for extending the current measurement range using a single shunt and voltage measurement using AMC1304Mx5 Isolated Delta-Sigma (ΔΣ) modulator. With careful selection of a low value shunt resistor that minimizes power dissipation, a front end amplifier with low noise and by introducing two gain paths, both upper and lower current limit is extended. Accuracy of < ±0.5 % for both current and voltage measurement is achieved by interfacing the modulator output to AM437x host processor which performs the Sinc3 filtering.

Features

Single Phase voltage and current measurement (shunt based) using isolated delta-sigma modulator (AMC1304Mx5)Measurement accuracy:1.AC Current: < ± 0.5% from 0.1A to 40A (or 60A) for In = 1A2.AC Voltage: < ± 0.5% from 10V to 300VAFE interfaced to host MCU (AM437x Sitara™ ARM® Cortex®-A9 Processor) which performs Sinc3 digital filtering using PRU-ICSSOnboard isolated ± 2.5V and +5.0V Power supply for AMC1304Mx5 and OPA188 using Transformer Driver and LDOsDesigned to work from 0.1A to 60A (In=1A) and can be extended for wider range (In=5A) by changing Shunt and Gain values.

Typical applications

• Protection Relays

More information

• Datasheet
• IC product information