ADS8691IPWR

Analog To Digital Converters (ADC) Overview

The ADS8691IPWR is an 18-bit, single-channel successive approximation register (SAR) analog-to-digital converter (ADC) manufactured by Texas Instruments. It operates with a sampling rate of 1 MSPS and features a serial peripheral interface (SPI). The device accepts single-ended inputs and includes an internal programmable gain amplifier (PGA), oscillator, and over-voltage protection. It requires an analog supply voltage between 4.75 V and 5.25 V and a digital supply voltage ranging from 1.65 V to 5.25 V. Key performance metrics include a signal-to-noise ratio (SNR) of 92.5 dB, differential nonlinearity (DNL) of 0.6 LSB, integral nonlinearity (INL) of 2.25 LSB, and a gain error of 0.01% FSR. The component consumes 42 mW of power and functions within a temperature range of -40°C to +125°C.

Analog To Digital Converters (ADC) Feature Summary

• Integrated 18-bit SAR architecture with 1 MSPS throughput
• Built-in PGA, internal oscillator, and over-voltage protection
• Single-ended input capability with SPI digital interface

Analog To Digital Converters (ADC) Applications

• High-precision data acquisition systems
• Industrial process control instrumentation
• Medical equipment requiring high-resolution signal conversion

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix 'IPWR' corresponds to the TSSOP-16 package and reel packaging configuration when sourcing. Confirm that the analog and digital supply voltages match the required 5V and 3.3V/5V rails respectively. Ensure ESD handling procedures are followed due to humidity sensitivity classification. Cross-reference the manufacturer part number with authorized distributors to guarantee authenticity and traceability for industrial or medical applications.

Analog To Digital Converters (ADC) Selection Notes

Select this component when an 18-bit resolution and 1 MSPS speed are required for single-ended signals. It is suitable for designs needing integrated PGA and over-voltage protection to simplify front-end circuitry. Consider the dual-supply requirement (analog vs. digital) during PCB layout. The wide operating temperature range supports harsh industrial environments. Verify SPI compatibility with the host microcontroller before finalizing the design.

Analog To Digital Converters (ADC) Part Context

The ADS8691 belongs to the ADS8691 series of high-speed, high-resolution ADCs from Texas Instruments. This series targets applications demanding precise analog-to-digital conversion with minimal external components. The IPWR variant specifically denotes the plastic small-outline package with thermal pad, optimized for surface-mount assembly in compact electronic devices.

Analog To Digital Converters (ADC) Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult official Texas Instruments resources for cross-references or pin-compatible alternatives within the same product family.