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

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)
INL (Max) (+/-LSB)
THD (Typ) (dB)
Rating
ADS1250 ADS1251 ADS1252 ADS1253 ADS1254 ADS1258
20     24     24     24     24     24    
25     20     41     20     20     125    
1     1     1     4     4     16    
SPI     SPI     SPI     SPI     SPI     SPI    
-40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 105    
SOIC | 16     SOIC | 8     SOIC | 8     SSOP | 16     SSOP | 20     VQFN | 48    
10.38 | 1ku     5.99 | 1ku     6.45 | 1ku     8.40 | 1ku     7.17 | 1ku     10.44 | 1ku    
75     7.5     40     7.5     4.3     42    
16SOIC: 77 mm2: 7.5 x 10.3 (SOIC | 16)     8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)     8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)     16SSOP: 29 mm2: 6 x 4.9 (SSOP | 16)     20SSOP: 52 mm2: 6 x 8.65 (SSOP | 20)     48VQFN: 49 mm2: 7 x 7 (VQFN | 48)    
Delta-Sigma     Delta-Sigma     Delta-Sigma     Delta-Sigma     Delta-Sigma     Delta-Sigma    
Differential
Single-Ended    
Differential     Differential     Differential     Differential     Differential
Single-Ended    
   
   
   
Multiplexed     Multiplexed     Multiplexed    
Ext     Ext     Ext     Ext     Ext     Ext    
PGA     50/60 Hz Rejection     50/60 Hz Rejection     50/60 Hz Rejection     50/60 Hz Rejection     GPIO
Oscillator    
4.196     5.25     5.25     5.25     5.25     2.85
5.35    
0     0     0     0     0     -2.7
0    
4.75     4.75     4.75     4.75     4.75     4.75    
5.25     5.25     5.25     5.25     5.25     5.25    
4.75     4.75     4.75     4.75     1.8     2.7    
5.25     5.25     5.25     5.25     3.6     5.25