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Texas Instruments ADS892xB 16-Bit SAR ADCs

Texas Instruments ADS892xB 16-Bit SAR Analog-to-Digital Converters (ADCs) are a family of pin-to-pin compatible, high-speed, high-precision successive approximation register (SAR) based ADCs. Each of these has an integrated reference buffer and integrated low-dropout regulator (LDO). These devices support unipolar, fully differential, analog input signals with ±0.5LSB INL and 96dB SNR specifications for the specified temperature range. The integrated LDO enables single-supply operation with low power consumption. The integrated reference buffer supports burst-mode data acquisition with 16-bit precision for the first sample.

External reference voltages in the range 2.5V to 5V are supported, offering a wide selection of input ranges without additional input scaling. The integrated multiSPI digital interface is backward-compatible to the traditional SPI protocol. Additionally, configurable features simplify board layout, timing, and firmware and support high throughput at lower clock speeds. The multiSPI digital interface of the Texas Instruments ADS892xB allows for easy interface with various microcontrollers, digital signal processors (DSPs), and field-programmable gate arrays (FPGAs).

Features

  • 16-bit resolution
  • High sample rate with no latency output
    • ADS8920B: 1MSPS
    • ADS8922B: 500kSPS
    • ADS8924B: 250kSPS
  • Integrated LDO enables single-supply operation
  • Burst-mode operation with a precise first sample
  • Excellent AC and DC performance
    • SNR: 96.8dB, THD: –125dB
    • INL: ±0.5LSB (max.)
    • DNL: ±0.5LSB (max.), 16-Bit NMC
  • Wide input range
    • ±VREF unipolar differential input range 
    • VREF Input Range: 2.5V to 5V
  • Single-supply, low-power operation (includes internal reference buffer and LDO)
    • ADS8920B: 21mW at 1MSPS
    • ADS8922B: 16mW at 500kSPS
    • ADS8924B: 14mW at 250kSPS
  • multiSPI digital interface
  • –40°C to +125°C extended temperature range 
  • Small footprint: 4mm × 4mm VQFN

Applications

  • Test and measurement
  • Medical imaging
  • High-precision, high-speed data acquisition

Videos

Functional Block Diagram

Block Diagram - Texas Instruments ADS892xB 16-Bit SAR ADCs
Published: 2016-12-12 | Updated: 2022-03-11