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
ADS8885 Datasheet
ADS8887 Datasheet

Functional Diagram

Texas Instruments

Inilathala: 0001-01-01 | Na-update: 0001-01-01

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

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