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Texas Instruments ADS888x 18-Bit SAR Analog-to-Digital Converters

Texas Instruments ADS888x 18-Bit SAR
Analog-to-Digital Converters

Texas Instruments ADS888x 18-Bit SAR Analog-to-Digital Converters are 18-bit, true-differential input, analog-to-digital converters (ADCs). These devices operate with a 2.5V to 5V external reference, offering a wide selection of signal ranges without additional input signal scaling. The reference voltage setting is independent of, and can exceed, the analog supply voltage (AVDD). The device offers an SPI-compatible serial interface that also supports daisy-chain operation for cascading multiple devices. An optional busy-indicator bit (available for ADS8883, ADS8887 only) makes synchronizing with the digital host easy. Device operation is optimized for very low-power operation. Power consumption directly scales with speed. This feature makes the ADS888x excellent for lower-speed applications.
Features
  • Sample Rate:
    • ADS8883 - 680kHz
    • ADS8885 - 400kHz
    • ADS8887 - 100kHz
  • No Latency Output
  • Unipolar, True-Differential Input Range: -VREF to +VREF
  • Wide Common-Mode Voltage Range: 0V to VREF with 90dB CMRR (min)
  • SPI™-Compatible Serial Interface with Daisy-Chain Option
  • Excellent AC and DC Performance
  • Wide Operating Range:
    • AVDD: 2.7V to 3.6V
    • DVDD:
      • ADS8883 - 2.7V to 3.6V (Independent of AVDD)
      • ADS8885, ADS8887 - 1.65V to 3.6V (Independent of AVDD)
    • REF: 2.5V to 5V (Independent of AVDD)
    • Operating Temperature: –40°C to +85°C
    • Low-Power Dissipation
    • Power-Down Current (AVDD): 50nA

  • Full-Scale Step Settling to 18 Bits:
    • ADS8883 - 540ns
    • ADS8885, ADS8887 - 1200ns
  • Packages: MSOP-10 and SON-10

    • Applications
    • Automatic Test Equipment (ATE)
    • Instrumentation and Process Controls
    • Precision Medical Equipment
    • Low-Power, Battery-Operated Instruments

Additional Resources
ADS8883 Datasheet ADS8883 Datasheet
ADS8885 Datasheet ADS8885 Datasheet
ADS8887 Datasheet ADS8887 Datasheet
Functional Diagram
Functional Diagram
  • Texas Instruments
Publicado: 0001-01-01 | Actualizado: 0001-01-01