ADS8681IRUMR

Analog To Digital Converters (ADC) Overview

The ADS8681IRUMR is a 16-bit successive approximation register (SAR) analog-to-digital converter (ADC) from Texas Instruments, packaged in a 16-WQFN (4x4 mm) with an exposed pad. It operates as a single-channel data acquisition system with a maximum sampling rate of 1 MSPS. The device supports a 5V analog supply and a digital I/O voltage range of 1.65V to 5.25V. It features a pseudo-differential or single-ended input type, an integrated programmable gain amplifier (PGA), and an on-chip 4.096V reference. The component functions within an industrial temperature range of -40°C to +125°C and utilizes a standard SPI interface for communication.

Analog To Digital Converters (ADC) Feature Summary

• Integrated analog front-end with overvoltage protection up to ±20 V
• Software-programmable bipolar and unipolar input ranges
• Low-drift internal 4.096 V reference voltage source
• High DC accuracy with precise gain and offset error adjustment

Analog To Digital Converters (ADC) Applications

• Industrial process control systems
• Analog input modules
• Semiconductor test equipment
• Servo drive control modules

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix 'IRUMR' against the manufacturer's official datasheet to confirm package dimensions, tape-and-reel specifications, and moisture sensitivity level. Ensure the ordering part number matches the required temperature grade and packaging format for your production line. Cross-reference the DigiKey or Mouser part numbers with the TI master list to validate current availability status and RoHS compliance details before finalizing procurement orders.

Analog To Digital Converters (ADC) Selection Notes

Select this component when a high-speed 1 MSPS sampling rate is required alongside 16-bit resolution in a compact surface-mount package. It is suitable for applications needing direct connection to signals up to ±20 V without external clamping circuits. Consider the integrated PGA and reference if board space for external precision components is limited. Verify that the SPI interface timing requirements align with the host microcontroller capabilities.

Analog To Digital Converters (ADC) Part Context

The ADS8681 belongs to the ADS868x family of integrated data acquisition systems, which also includes the ADS8685 and ADS8689. These devices share similar architectures but differ primarily in their maximum sampling rates, with the ADS8681 offering the highest speed at 1 MSPS. The family is designed for industrial applications requiring high accuracy and robust input protection in a single-supply environment.

Analog To Digital Converters (ADC) Replacement Considerations

The ADS8685WRUMR and ADS8689WRUMR are pin-compatible alternatives within the same series, offering lower sampling rates of 500 kSPS and 100 kSPS respectively. These may be used if higher speed is not required. Other SAR ADCs from different manufacturers require careful evaluation of pinout compatibility, interface protocols, and performance specifications.