ADS8688ATDBTR

Analog To Digital Converters (ADC) Overview

The ADS8688ATDBTR is an 8-channel, 16-bit successive approximation register (SAR) analog-to-digital converter (ADC) from Texas Instruments. It operates at a throughput of up to 500 kSPS and features integrated analog front-end circuitry with ±20-V overvoltage protection. The device supports bipolar input ranges of ±10.24 V down to ±0.64 V and unipolar ranges up to 10.24 V. It includes an internal 4.096-V reference with 6 ppm/°C drift, a programmable gain amplifier, and an 8-channel multiplexer with auto/manual scan modes. Powered by a single 5-V analog supply and 1.65-V to 5.25-V digital supply, it communicates via SPI and supports daisy-chaining in a TSSOP-38 package.

Analog To Digital Converters (ADC) Feature Summary

• Integrated analog front-end with channel-independent software-programmable input ranges and constant resistive input impedance.
• Built-in 8-channel multiplexer supporting both automatic and manual scanning modes for flexible data acquisition.
• High precision performance with low differential and integral nonlinearity errors and excellent signal-to-noise ratio.
• Robust input protection allowing direct connection of sensors with overvoltage tolerance up to ±20 V.

Analog To Digital Converters (ADC) Applications

• Power automation systems
• Protection relays
• PLC analog input modules

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific ordering suffix DBTR indicates tape-and-reel packaging when sourcing components. Confirm that the device meets RoHS compliance requirements for your region. Ensure the supplier provides valid traceability documentation, as export restrictions may apply depending on the destination country. Cross-reference the manufacturer part number with official distributor catalogs to ensure authenticity and correct revision level.

Analog To Digital Converters (ADC) Selection Notes

Select this component for applications requiring high channel count and precision in industrial environments. The integrated PGA and wide input range simplify sensor interface design. Verify that the host microcontroller supports the required SPI clock speeds and daisy-chain configuration. Consider thermal management if operating near the maximum temperature limit, as junction-to-ambient resistance impacts power dissipation.

Analog To Digital Converters (ADC) Part Context

This part belongs to the ADS8688A family of 16-bit SAR ADCs designed for multi-channel data acquisition. It shares architectural similarities with other TI devices but offers a unique combination of eight channels, integrated analog front-end, and robust overvoltage protection in a compact TSSOP-38 package.

Analog To Digital Converters (ADC) Replacement Considerations

Direct substitutes within the same family include the ADS8688ATDT. For evaluation purposes, the discontinued ADS8688AEVM-PDK was previously used, though alternative development tools should be sourced for current projects.