ADS1242 24-Bit ADC, 4 Ch, PGA 1:128, 50/60 Hz Notch, 0.6 mW Power Consumption | TI.com

ADS1242 (ACTIVE)

24-Bit ADC, 4 Ch, PGA 1:128, 50/60 Hz Notch, 0.6 mW Power Consumption

24-Bit ADC, 4 Ch, PGA 1:128, 50/60 Hz Notch, 0.6 mW Power Consumption - ADS1242
Datasheet
 

Recommended alternative parts

  • ADS124S06  - The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device.   ADS124S06 offers more analog inputs (6), faster sample rate (4kSPS), lower noise, lower power, smaller package + integrated VREF, OSC, IDACs & temp sensor

Description

The ADS1242 and ADS1243 are precision, wide dynamic range, delta-sigma, analog-to-digital (A/D) converters with 24-bit resolution operating from 2.7V to 5.25V supplies. These delta-sigma, A/D converters provide 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 50Hz and 60Hz 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 ADS1242 and ADS1243 are 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 50Hz AND 60Hz REJECTION (-90dB MINIMUM)
  • 0.0015% INL
  • 21 BITS EFFECTIVE RESOLUTION (PGA = 1), 19 BITS (PGA = 128)
  • PGA GAINS FROM 1 TO 128
  • SINGLE-CYCLE SETTLING
  • PROGRAMMABLE DATA OUTPUT RATES
  • EXTERNAL DIFFERENTIAL REFERENCE OF 0.1V TO 5V
  • ON-CHIP CALIBRATION
  • SPI™ COMPATIBLE
  • 2.7V TO 5.25V SUPPLY RANGE
  • 600µW POWER CONSUMPTION
  • UP TO EIGHT INPUT CHANNELS
  • UP TO EIGHT DATA I/O
  • APPLICATIONS
    • INDUSTRIAL PROCESS CONTROL
    • LIQUID/GAS CHROMATOGRAPHY
    • BLOOD ANALYSIS
    • SMART TRANSMITTERS
    • PORTABLE INSTRUMENTATION
    • WEIGHT SCALES

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)
INL (Max) (+/-LSB)
Rating
ADS1242
24    
0.015    
4    
SPI    
-40 to 85    
TSSOP | 16    
4.51 | 1ku    
0.6    
16TSSOP: 22 mm2: 4.4 x 5 (TSSOP | 16)    
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    
Catalog