ADS131A02 24-bit 128-kSPS 2-channel simultaneous-sampling delta-sigma ADC | TI.com

ADS131A02 (ACTIVE) 24-bit 128-kSPS 2-channel simultaneous-sampling delta-sigma ADC

 

Description

The ADS131A02 and ADS131A04 devices are two- and 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 resistor-divider network, a current transformer, or a Rogowski coil to measure voltage or current. Flexible power-supply 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 and during data transfer.

The complete analog front-end (AFE) solutions are packaged in a 32-pin TQFP package and are specified over the industrial temperature range of –40°C to +125°C.

Features

  • 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

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Parametrics

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Part number Order Resolution (Bits) Sample rate (Max) (kSPS) Number of input channels Interface Operating temperature range (C) Package Group Approx. price (US$) Power consumption (Typ) (mW) Package size: mm2:W x L (PKG) Architecture Input type Multi-channel configuration Reference mode Features Input range (Max) (V) Input range (Min) (V) Analog voltage AVDD (Min) (V) Analog voltage AVDD (Max) (V) Digital supply (Min) (V) Digital supply (Max) (V) SNR (dB) THD (Typ) (dB) Rating
ADS131A02 Order now 24     128     2     SPI     -40 to 125     TQFP | 32     3.15 | 1ku     1.2     32TQFP: 49 mm2: 7 x 7 (TQFP | 32)     Delta-Sigma     Differential
Single-Ended    
Simultaneous Sampling     Ext
Int    
Daisy-Chainable     4.5     -1.5     3     5.5     1.65     3.6     115.2     -100     Catalog    
ADS131A04 Order now 24     128     4     SPI     -40 to 125     TQFP | 32     4.15 | 1ku     1.2     32TQFP: 49 mm2: 7 x 7 (TQFP | 32)     Delta-Sigma     Differential
Single-Ended    
Simultaneous Sampling     Ext
Int    
Daisy-Chainable     4.5     -1.5     3     5.5     1.65     3.6     115.2     -100     Catalog    
ADS131E08 Order now 24     64     8     SPI     -40 to 105     TQFP | 64     7.15 | 1ku     6     64TQFP: 144 mm2: 12 x 12 (TQFP | 64)     Delta-Sigma     Differential
Pseudo-Differential    
Simultaneous Sampling     Ext
Int    
Daisy-Chainable
GPIO
Oscillator
PGA    
4     0     2.7     5.25     1.8     3.6     107     -93     Catalog    
ADS131E08S Order now 24     64     8     SPI     -40 to 105     TQFP | 64     7.15 | 1ku     2     64TQFP: 144 mm2: 12 x 12 (TQFP | 64)     Delta-Sigma     Differential
Pseudo-Differential    
Simultaneous Sampling     Int     Daisy-Chainable
GPIO
Oscillator
PGA