ADS1243-HT High-Temperature 24-Bit ADC, 8-Ch, PGA 1:128, 50/60Hz Notch | TI.com

ADS1243-HT (ACTIVE)

High-Temperature 24-Bit ADC, 8-Ch, PGA 1:128, 50/60Hz Notch

High-Temperature 24-Bit ADC, 8-Ch, PGA 1:128, 50/60Hz Notch - ADS1243-HT
Datasheet
 

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Description

The ADS1243 is a precision, wide dynamic range, delta-sigma, analog-to-digital (A/D) converter with 24-bit resolution operating from 2.7-V to 5.25-V supplies. This delta-sigma, A/D converter provides up to 24 bits of no missing code performance and effective resolution of 21 bits.

The input channels are multiplexed. Internal buffering can be selected to provide a very high input impedance for direct connection to transducers or low-level voltage signals. Burnout current sources are provided that allow for the detection of an open or shorted sensor. An 8-bit digital-to-analog converter (DAC) provides an offset correction with a range of 50% of the FSR (Full-Scale Range).

The Programmable Gain Amplifier (PGA) provides selectable gains of 1 to 128 with an effective resolution of 19 bits at a gain of 128. The A/D conversion is accomplished with a second-order delta-sigma modulator and programmable FIR filter that provides a simultaneous 50-Hz and 60-Hz notch. The reference input is differential and can be used for ratiometric conversion.

The serial interface is SPI compatible. Up to eight bits of data I/O are also provided that can be used for input or output. The ADS1243 is designed for high-resolution measurement applications in smart transmitters, industrial process control, weight scales, chromatography and portable instrumentation.

Features

  • 24-Bits No Missing Codes
  • Simultaneous 50-Hz and 60-Hz Rejection
    (–90 dB Minimum)
  • 0.0025% INL
  • PGA Gains From 1 to 128
  • Single-Cycle Settling
  • Programmable Data Output Rates
  • External Differential Reference
    of 0.1 V to 5 V
  • On-Chip Calibration
  • SPI™ Compatible
  • 2.7 V to 5.25 V Supply Range
  • 600-µW Power Consumption
  • Up to Eight Input Channels
  • Up to Eight Data I/O

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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
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)
SNR (dB)
Rating
ADS1243-HT
24    
0.015    
8    
SPI    
-55 to 210    
CDIP SB | 20    
0.6    
See datasheet (CDIP SB)    
Delta-Sigma    
Differential
Single-Ended    
Multiplexed    
Ext    
50/60 Hz Rejection
GPIO
PGA    
5.25    
0    
2.7    
5.25    
2.7    
5.25    
251.7    
124    
High Temp