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ADS1242

ACTIVE

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

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Data sheet

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ADS124S06 ACTIVE 24-bit, 4-kSPS, 6-ch delta-sigma ADC with PGA and voltage reference for precision sensor measurement More analog inputs (6), faster sample rate (4 kSPS)

ADS1242

ACTIVE
Data sheet Order now

Product details

Resolution (Bits) 24 Sample rate (max) (ksps) 0.015 Number of input channels 4 Interface type SPI Architecture Delta-Sigma Input type Differential, Single-ended Multichannel configuration Multiplexed Rating Catalog Reference mode External Input voltage range (max) (V) 5.25 Input voltage range (min) (V) 0 Features 50/60 Hz Rejection, GPIO, PGA Operating temperature range (°C) -40 to 85 Power consumption (typ) (mW) 0.6 Analog supply (min) (V) 2.7 Analog supply voltage (max) (V) 5.25 Digital supply (min) (V) 2.7 Digital supply (max) (V) 5.25
Resolution (Bits) 24 Sample rate (max) (ksps) 0.015 Number of input channels 4 Interface type SPI Architecture Delta-Sigma Input type Differential, Single-ended Multichannel configuration Multiplexed Rating Catalog Reference mode External Input voltage range (max) (V) 5.25 Input voltage range (min) (V) 0 Features 50/60 Hz Rejection, GPIO, PGA Operating temperature range (°C) -40 to 85 Power consumption (typ) (mW) 0.6 Analog supply (min) (V) 2.7 Analog supply voltage (max) (V) 5.25 Digital supply (min) (V) 2.7 Digital supply (max) (V) 5.25
TSSOP (PW) 16 32 mm² 5 x 6.4
  • 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.
  • 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.

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.

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.
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Technical documentation

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Type Title Date
* Data sheet 24-Bit Analog-To-Digital Converters datasheet (Rev. H) 08 Oct 2013
Application note Digital Filter Types in Delta-Sigma ADCs (Rev. A) PDF | HTML 29 Mar 2023
Application note Measuring Single-Ended 0V-5V Signals with Differential Delta-Sigma ADCs (Rev. A) 18 May 2015
Application note The Offset DAC (Rev. A) 01 Apr 2015
E-book Best of Baker's Best: Precision Data Converters -- Delta-Sigma ADCs 19 Mar 2015
Technical article Leverage coherent sampling and FFT windows when evaluating SAR ADCs (Part 1) 13 Mar 2015
Application note Inputs Currents for High-Resolution ADCs 06 Mar 2003

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