返回Texas Instruments

Texas Instruments ADS8634 / ADS8638 Analog-to-Digital Converters

Texas Instruments ADS8634 and ADS8638 12-bit Analog-to-Digital Converters (ADCs) are capable of measuring inputs up to ±10V at 1MSPS. These TI ADCs use a SAR core to provide a sample-and-hold front-end with no latency in conversions. TI ADS8634 ADCs include an input multiplexer for measuring up to four inputs. The TI ADS8638 can measure up to eight inputs. The TI ADS8634 and ADS8638 feature an internal temperature sensor, voltage reference, and a digital comparator for setting alarm thresholds on each input. The digital supply operates from 5V all the way down to 1.8V for direct connection to a wide range of processors and controllers. Texas Instruments ADS8634 and ADS8638 Analog-to-Digital Converters are ideal for use in demanding industrial measurement applications and are fully specified over the extended industrial temperature range of -40ºC to +125ºC.

Specifications

  • Selectable Input Range:
    • ±10V, ±5V, ±2.5V, 0V to 10V, or 0V to 5V
  • Up to ±12V with external reference
  • No latent conversions up to 1MSPS
  • Outstanding Performance:
    • 12-bits no missing codes
    • INL: ±0.9LSB
    • SNR: 71.8dB
  • Highly Integrated:
    • 4- or 8-channel input mux
    • Temperature sensor
    • Internal voltage reference
    • Alarm thresholds for each channel
  • Low Power:
    • 14.45mW at 1MSPS
    • 5.85mW at 0.1MSPS
    • Flexible power-down mode
  • SPI™-compatible serial interface
  • Extended Temperature Range:
    • -40°C to +125°C
  • 4mm × 4mm QFN fpackage

Applications

  • Industrial process controls (PLC)
  • Data acquisition systems
  • High-speed, closed-loop systems
  • Digital power supplies

Performance Demo Kit

The ADS8638EVM-PDK Performance Demonstration Kit is designed to evaluate the ADS8614, ADS8618, ADS8634, and ADS8638 analog to digital converters. These 12/16-bit, four or eight channel, SAR converters offer multiple true bipolar and unipolar ranges in addition to a variety of alarm options. An LED is installed on the ADS8638EVM board to monitor the alarm. The EVM gives access to every pin of the converter, which enables the ADCs serial interface header to easily attach to any host microprocessor or TI DSP based system.

发布日期: 2011-12-22 | 更新日期: 2022-03-11