Delta-Sigma ADC - Texas Instruments
Description
Product Folder
Order Now
Technical Documents
Tools & Software
Support & Community
ADS131A02, ADS131A04
SBAS590E – MARCH 2016 – REVISED JUNE 2020
ADS131A0x 2- or 4-Channel, 24-Bit, 128-kSPS, Simultaneous-Sampling, Delta-Sigma ADC
1 Features
•1 2 or 4 simultaneous-sampling differential inputs • Data rates up to 128 kSPS • High performance:
– Single-channel accuracy: better than 0.
1% at 10,000:1 dynamic range
– Effective resolution: 20.
6 bits at 8 kSPS – THD: –100 dB 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 communications • 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: commercial 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 kSPS, 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 option...
Similar Datasheet
