ADS1250 20-Bit Data Acquisition System Analog-to-Digital Converter | TI.com

ADS1250 (ACTIVE) 20-Bit Data Acquisition System Analog-to-Digital Converter

 

Description

The ADS1250 is a precision, wide dynamic range, delta-sigma, analog-to-digital converter with 20-bit resolution operating from a single +5V supply. The delta-sigma architecture is used for wide dynamic range and to guarantee 20 bits of no missing code performance. An effective resolution of 18 bits (2.8ppm of rms noise) is achieved for conversion rates up to 25kHz. The dynamic range of the converter is further increased by providing a low-noise Programmable Gain Amplifier (PGA) with gain stages of 1, 2, 4, or 8 for low level input signals.

The ADS1250 is designed for high-resolution measurement applications in cardiac diagnostics, smart transmitters, industrial process control, weigh scales, chromatography and portable instrumentation. The converter includes a flexible synchronous serial interface and offers a three-wire control mode for low-cost isolation.

The ADS1250 is a single-channel converter and is offered in an SOL-16 package.

Features

  • DATA RATE: 25kHz
  • DIFFERENTIAL INPUTS
  • LOW NOISE: 2.8ppm at PGA = 1
  • INL: 0.002%
  • 20 BITS NO MISSING CODES
  • PROGRAMMABLE FULL SCALE
  • EXTERNAL REFERENCE
  • I/O CONTROLLED PGA: 1, 2, 4, 8

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) INL (Max) (+/-LSB) THD (Typ) (dB) Rating
ADS1250 Order now 20     25     1     SPI     -40 to 85     SOIC | 16     10.38 | 1ku     75     16SOIC: 77 mm2: 7.5 x 10.3 (SOIC | 16)     Delta-Sigma     Differential
Single-Ended    
   
Ext     PGA     4.196     0     4.75     5.25     4.75     5.25     21     -97     Catalog    
ADS1251 Order now 24     20     1     SPI     -40 to 85     SOIC | 8     5.99 | 1ku     7.5     8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)     Delta-Sigma     Differential    
   
Ext     50/60 Hz Rejection     5.25     0     4.75     5.25     4.75     5.25     251.7     -105     Catalog    
ADS1252 Order now 24     41     1     SPI     -40 to 85     SOIC | 8     6.45 | 1ku     40     8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)     Delta-Sigma     Differential    
   
Ext     50/60 Hz Rejection     5.25     0     4.75     5.25     4.75     5.25     251.7     -97     Catalog    
ADS1253 Samples not available 24     20     4     SPI     -40 to 85     SSOP | 16     8.40 | 1ku     7.5     16SSOP: 29 mm2: 6 x 4.9 (SSOP | 16)     Delta-Sigma     Differential     Multiplexed     Ext