ADS1120 ADC for Small Signal Sensors

TI's low-power, low-noise, 16-bit analog-to-digital converters

Image of Texas Instruments' ADS1120 ADC for Small Signal SensorsTexas Instruments' ADS1120 is a precision, 16-bit, analog-to-digital converter (ADC) that offers many integrated features to reduce system cost and component count in applications measuring small sensor signals. The device features two differential or four single-ended inputs through a flexible input multiplexer (mux), a low-noise, programmable gain amplifier (PGA), two programmable excitation current sources, a voltage reference, an oscillator, a low-side switch, and a precision temperature sensor.

The device can perform conversions at data rates up to 2000 samples-per-second (SPS) with single-cycle settling. At 20 SPS, the digital filter offers simultaneous 50 Hz and 60 Hz rejection for noisy industrial applications. The internal PGA offers gains up to 128 V/V. This PGA makes the ADS1120 ideally-suited for applications measuring small sensor signals, such as resistance temperature detectors (RTDs), thermocouples, thermistors, and bridge sensors. The device supports measurements of pseudo- or fully-differential signals when using the PGA. Alternatively, the device can be configured to bypass the internal PGA while still providing high input impedance and gains up to 4 V/V, allowing for single-ended measurements.

Features Applications
  • Low current consumption:
    As low as 120 μA (typ) in duty-cycle mode
  • Wide supply range: 2.3 V to 5.5 V
  • Programmable gain: 1 V/V to 128 V/V
  • Programmable data rates: Up to 2 kSPS
  • 16-bit noise-free resolution at 20 SPS
  • Simultaneous 50 Hz and 60 Hz rejection at 20 SPS with single-cycle settling digital filter
  • Temperature sensors:
    • Thermocouples
    • Resistance Temperature Detectors (RTDs):
      2-, 3-, or 4-wire types
  • Bridge sensors
  • Portable instrumentation
  • Factory automation and process controls

ADS1120 ADC for Small Signal Sensors

ImageManufacturer Part NumberDescriptionNumber of BitsSampling Rate (Per Second)Available Quantity
ADS1120IPWR datasheet linkIC ADC CONV 16BIT LP LN 16TSSOPADS1120IPWRIC ADC CONV 16BIT LP LN 16TSSOP162k3814 - Immediate
10000 - Factory Stock
ADS1120IPWR product page link
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Published: 2014-04-15