ADS131A02 24-Bit, 128kSPS, 2-Ch, Simultaneous Sampling, Delta-Sigma ADC | TI.com

ADS131A02 (ACTIVE)

24-Bit, 128kSPS, 2-Ch, 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

All trademarks are the property of their respective owners.

View more

Parametrics Compare all products in Precision ADCs (<=10MSPS)

 
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)
SINAD (dB)
SNR (dB)
THD (Typ) (dB)
Rating
ADS131A02 ADS131A04 ADS131E08 ADS131E08S
24     24     24     24    
128     128     64     64    
2     4     8     8    
SPI     SPI     SPI     SPI    
-40 to 125     -40 to 125     -40 to 105     -40 to 105    
TQFP | 32     TQFP | 32     TQFP | 64     TQFP | 64    
3.15 | 1ku     4.15 | 1ku     7.15 | 1ku     7.15 | 1ku    
1.2     1.2     6     2    
32TQFP: 49 mm2: 7 x 7 (TQFP | 32)     32TQFP: 49 mm2: 7 x 7 (TQFP | 32)     64TQFP: 144 mm2: 12 x 12 (TQFP | 64)     64TQFP: 144 mm2: 12 x 12 (TQFP | 64)    
Delta-Sigma     Delta-Sigma     Delta-Sigma     Delta-Sigma    
Differential
Single-Ended    
Differential
Single-Ended    
Differential
Pseudo-Differential    
Differential
Pseudo-Differential    
Simultaneous Sampling     Simultaneous Sampling     Simultaneous Sampling     Simultaneous Sampling    
Ext
Int    
Ext
Int    
Ext
Int    
Int    
Daisy-Chainable     Daisy-Chainable     Daisy-Chainable
GPIO
Oscillator
PGA    
Daisy-Chainable
GPIO
Oscillator
PGA    
4.5     4.5     4     4    
-1.5     -1.5     0     0    
3     3     2.7     2.7    
5.5     5.5     5.25     5.25    
1.65     1.65     1.8     1.7    
3.6     3.6     3.6     3.6    
101     -101        
115.2     115.2     107     108    
-100     -100     -93     -107    
Catalog     Catalog     Catalog     Catalog