ADS7947 12-Bit 2MSPS ADC



TI's 12-bit 2MSPS, dual-channel, unipolar, pseudo-differential, ultralow-power SAR ADC

Texas Instruments ADS7947 12-Bit 2MSPS ADC Texas Instruments' ADS7947 is a 12-bit 2MSPS analog-to-digital converter (ADC). This device operates at 2MSPS with a standard 16 clock data frame. In addition, it is possible to operate the ADS7947 at 2.1MSPS with a short data frame optimized for the number of clocks sufficient for conversion with no drop in performance. The device features both outstanding DC precision and excellent dynamic performance. This family of pin-compatible devices includes a two-channel input multiplexer and a low-power successive approximation register (SAR) ADC with an inherent sample-and-hold (S/H) input stage. The ADS7947 supports a wide analog supply range that allows the full-scale input range to extend to 5V. A simple SPI™, with a digital supply that can operate as low as 1.65V, allows for easy interfacing to a wide variety of digital controllers. Automatic power-down can be enabled when operating at slower speeds to dramatically reduce power consumption.   ADS7947 Datasheet

  Features   Applications
  • Sample rate: 2MSPS
  • Pin-compatible family: 12/10/8-bit
  • Outstanding performance:
    • No missing codes
    • INL: 1LSB (max)
    • SNR: 72dB (min)
  • Low power:
    • 7.5mW at 2MSPS operation
    • Auto power-down at lower speeds:
      • 3.8mW at 500kSPS
      • 0.8mW at 100kSPS
      • 0.16mW at 20kSPS
  • Wide supply range:
    • Analog: 2.7V to 5.5V
    • Digital: 1.65V to AVDD
  • Simple serial interface (SPI)
  • Fully specified from -40°C to +125°C
  • Tiny footprint: 3mm × 3mm QFN
  • Communication systems
  • Optical networking
  • Medical instrumentation
  • Battery-powered equipment
  • Data acquisition systems
  • RoHS Compliant

Texas Instruments
Part Number
Digi-Key
Part Number
Packaging Number
of Bits
Sampling Rate
(Per Second)
Package  
ADS7947SRTER 296-27831-2-ND Tape & Reel 12 2.1M 16-WQFN
Exposed Pad
(3mm x 3mm)
ADS7947 Datasheet
296-27831-1-ND Cut Tape
296-27831-6-ND Digi-Reel