ADS131A02 Datasheet | Texas Instruments

Features - 1 2 or 4 simultaneous-sampling differential inputs - Data rates up to 128 k SPS - High performance: - Single-channel accuracy: better than 0.1% at 10,000:1 dynamic range - Effective resolution: 20.6 bits at 8 k SPS - THD: - 100 d B at 50 Hz and 60 Hz - Integrated negative charge pump allows absolute input voltages below ground - Flexible analog power-supply operation: - Using negative charge pump: 3.0 V to 3.45 V - Unipolar supply: 3.3 V to 5.5 V - Bipolar supply: ±2.5 V - Digital supply: 1.65 V to 3.6 V - Low-drift internal voltage reference: 6 ppm/°C - ADC self checks - Cyclic redundancy check (CRC) and hamming code error correction on munications - Multiple SPI data interface modes: - Asynchronous interrupt - Synchronous master and slave - Package: 32-pin TQFP - Operating temperature range: - 40°C to +125°C 2 Applications - Electricity meters: mercial and residential - Circuit breakers - Battery test equipment - Battery management systems - Data acquisition systems 3 Description The ADS131A02 and ADS131A04 devices are twoand four-channel, simultaneous-sampling, 24-bit, delta-sigma (ΔΣ), analog-to-digital converters (ADCs). The wide dynamic range, with scalable data rates up to 128 k SPS, and internal fault monitors make the ADS131A02 or ADS131A04 a good choice when designing for energy monitoring, grid protection, and control applications. The ADC inputs can be independently and directly interfaced to a resistordivider network, a current transformer, or a Rogowski coil to measure voltage or current. Flexible powersupply options, including an internal negative charge pump, are available to maximize the effective resolution for high dynamic range applications. Asynchronous and synchronous master and slave interface options are available, providing ADC configuration flexibility when chaining multiple devices in a single system. Several interface checks, ADC startup checks, and data integrity checks can be enabled on the interface to report errors in the ADC...