ADS8688AIDBT

Analog To Digital Converters (ADC) Overview

The ADS8688AIDBT is an eight-channel, 16-bit successive approximation register (SAR) analog-to-digital converter (ADC) from Texas Instruments. It operates at a throughput of 500 kSPS and integrates an analog front end with over-voltage protection up to ±20 V. The device supports single-ended inputs with software-programmable bipolar ranges of ±10.24 V, ±5.12 V, ±2.56 V, ±1.28 V, and ±0.64 V, as well as unipolar ranges of 0 V to 10.24 V, 0 V to 5.12 V, 0 V to 2.56 V, 0 V to 1.28 V, and 0 V to 0.64 V. It features a constant 1 MΩ input impedance, an internal 4.096 V reference, and a SPI-compatible interface. Powered by a 5 V analog supply and 1.65 V to 5.25 V digital supply, it achieves a signal-to-noise ratio of 92 dB, DNL of ±0.5 LSB, INL of ±0.75 LSB, and gain error of 0.02% FSR within the -55°C to +125°C temperature range in a 38-TSSOP package.

Analog To Digital Converters (ADC) Feature Summary

• Integrated analog front end with high-precision programmable gain amplifiers and multiplexers supporting independent channel configuration.
• Robust input protection featuring a constant 1 MΩ resistive input impedance and tolerance for over-voltage conditions up to ±20 V.
• Flexible power architecture allowing direct connection to various host controllers via a wide-range digital supply voltage.
• High linearity performance with low differential and integral nonlinearity errors ensuring accurate data acquisition.

Analog To Digital Converters (ADC) Applications

• Industrial process control systems requiring multi-channel analog input modules
• Programmable logic controller (PLC) analog input cards
• Protection relays and power monitoring equipment
• Data acquisition systems for factory automation

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix 'AIDBT' corresponds to the industrial temperature grade (-55°C to +125°C) and tube packaging format. Confirm RoHS compliance status and moisture sensitivity level requirements for your assembly process. Ensure the ordering part number matches the exact pinout and electrical specifications required for your schematic design.

Analog To Digital Converters (ADC) Selection Notes

Select this component when eight channels of 16-bit resolution are required with integrated signal conditioning. It is suitable for applications needing wide input voltage ranges without external op-amps. Consider the 38-TSSOP package dimensions and thermal characteristics during PCB layout. Verify that the SPI interface timing meets the host microcontroller's maximum clock speed requirements.

Analog To Digital Converters (ADC) Part Context

This part belongs to the ADS868x family of 16-bit SAR ADCs, which includes variants like the ADS8684 (4-channel) and ADS8689. The ADS8688AIDBT specifically provides eight channels in a TSSOP-38 package. It shares core architectural features with other members of the series but differs in channel count and specific package options.

Analog To Digital Converters (ADC) Replacement Considerations

The ADS8688AT serves as a functional equivalent within the same product family. Other compatible parts include the ADS8688AIDBTR for tape-and-reel packaging or the ADS8688IDBT for standard industrial grade. Verify pin compatibility and parameter alignment before substitution.