ADS1254 24-Bit, 20-kSPS, 4-Ch delta-sigma ADC with separate AVDD and DVDD | TI.com

ADS1254
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24-Bit, 20-kSPS, 4-Ch delta-sigma ADC with separate AVDD and DVDD

 

Description

The ADS1254 is a precision, wide dynamic range, delta-sigma, Analog-to-Digital (A/D) converter with 24-bit resolution. The delta-sigma architecture is used for wide dynamic range and to ensure 24 bits of no missing codes performance. An effective resolution of 19 bits (1.8ppm of rms noise) is achieved for conversion rates up to 20kHz.

The ADS1254 is designed for high-resolution measurement applications in cardiac diagnostics, smart transmitters, industrial process control, weight scales, chromatography, and portable instrumentation. The converter includes a flexible, two-wire synchronous serial interface for low-cost isolation.

The ADS1254 is a multi-channel converter and is offered in an SSOP-20 package.

Features

  • 24 BITS—NO MISSING CODES
  • 19 BITS EFFECTIVE RESOLUTION UP TO 20kHz DATA RATE
  • LOW NOISE: 1.8ppm
  • FOUR DIFFERENTIAL INPUTS
  • INL: 15ppm (max)
  • EXTERNAL REFERENCE (0.5V to 5V)
  • POWER-DOWN MODE
  • SYNC MODE
  • LOW POWER: 4mW at 20kHz
  • SEPARATE DIGITAL SUPPLY 1.8V to 3.6V
  • APPLICATIONS
    • CARDIAC DIAGNOSTICS
    • DIRECT THERMOCOUPLE INTERFACES
    • BLOOD ANALYSIS
    • INFRARED PYROMETERS
    • LIQUID/GAS CHROMATOGRAPHY
    • PRECISION PROCESS CONTROL

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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) INL (Max) (+/-LSB) THD (Typ) (dB) Rating
ADS1254 Order now 24     20     4     SPI     -40 to 85     SSOP | 20     7.17 | 1ku     4.3     20SSOP: 52 mm2: 6 x 8.65 (SSOP | 20)     Delta-Sigma     Differential     Multiplexed     Ext     50/60 Hz Rejection     5.25     0     4.75     5.25     1.8     3.6     252     -105     Catalog    
ADS1250 Samples not available 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