Texas Instruments ADS7042 SAR Analog-to-Digital Converter (ADC)

Texas Instruments ADS7042 Ultra-Low Power SAR Analog-to-Digital Converter (ADC) is a 12-bit 1MSPS ADC that supports a wide analog input voltage range (1.8V to 3.6V) and includes a capacitor-based, successive-approximation register (SAR) ADC with an inherent sample-and-hold circuit. The SPI-compatible serial interface is controlled by the CS and SCLK signals. The input signal is sampled with the CS falling edge, and SCLK is used for conversion and serial data output. The device supports a wide digital supply range (1.65V to 3.6V), enabling a direct interface to a variety of host controllers. The Texas Instruments ADS7042 complies with the JESD8-7A standard for the normal DVDD range (1.65V to 1.95V).

Features

  • SAR ADC with Nanowatt Power Consumption
    • 234µW at 1MSPS with 1.8V AVDD
    • 690µW at 1MSPS with 3V AVDD
    • 69µW at 100kSPS with 3V AVDD
    • Less than 1µW at 1kSPS with 3V AVDD
  • Small SAR ADC
    • X2QFN-8 Package with 2.25mm2 Footprint
  • 1MSPS Throughput with Zero Data Latency
  • Wide Operating Range
    • 1.8V to 3.6V AVDD
    • 1.65V to 3.6V (Independent of AVDD) DVDD
    • -40°C to +125°C Temperature Range
  • Excellent Performance
    • 12-Bit Resolution with NMC
    • ±1LSB (Max) DNL and INL
    • 70dB SNR with 3V AVDD
    • -80dB THD with 3V AVDD
    • 0V to AVDD Unipolar Input Range
    • Integrated Offset Calibration
    • 16MHz SPI™-Compatible Serial Interface
    • JESD8-7A Compliant Digital I/O

Applications

  • Low-Power Data Acquisition
  • Battery-Powered Handheld Equipment
  • Level Sensors
  • Ultrasonic Flow Meters
  • Motor Control
  • Wearable Fitness
  • Portable Medical Equipment
  • Hard Drives
  • Glucose Meters

Block Diagram

Block Diagram - Texas Instruments ADS7042 SAR Analog-to-Digital Converter (ADC)
Publicado: 2014-09-16 | Actualizado: 2022-03-11