ADS8638SRGER

Analog To Digital Converters (ADC) Overview

The ADS8638SRGER is a Texas Instruments 12-bit, 8-channel bipolar successive approximation register (SAR) analog-to-digital converter. It features a sampling rate of 1 MSPS and supports single-ended inputs with software-selectable ranges including ±10V, ±5V, ±2.5V, 0V to 10V, and 0V to 5V. The device operates on an analog supply voltage of 2.7 V to 5.25 V and a digital supply voltage of 1.65 V to 5.25 V. Key performance metrics include a signal-to-noise ratio (SNR) of 71.8 dB and a power consumption of 14.45 mW at full speed. It utilizes a standard SPI interface for communication and is housed in a 24-pin VQFN package.

Analog To Digital Converters (ADC) Feature Summary

• Integrated input multiplexer supporting up to eight single-ended channels with flexible range selection
• Built-in internal temperature sensor and programmable comparator for alarm threshold monitoring
• Flexible power management with low consumption modes and independent analog/digital supply domains
• High integration level reducing external component count through internal voltage reference and SAR architecture

Analog To Digital Converters (ADC) Applications

• Industrial process control systems requiring multi-channel data acquisition
• Programmable logic controllers (PLCs) for sensor interfacing
• Data acquisition systems demanding high channel density and moderate speed
• Closed-loop control systems utilizing fast conversion rates

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix 'GER' indicates reel packaging when ordering. Confirm RoHS compliance status through official manufacturer documentation prior to procurement. Ensure compatibility with existing PCB footprint requirements for the VQFN-24 package. Validate that the supplier provides genuine Texas Instruments components to avoid counterfeit risks in industrial applications.

Analog To Digital Converters (ADC) Selection Notes

Select this model over the ADS8634 variant when eight input channels are required instead of four. Consider the dual-supply requirement for AVDD and DVDD during system design. Evaluate the need for external versus internal voltage references based on precision requirements. Verify that the operating temperature range of -40°C to +125°C meets environmental specifications.

Analog To Digital Converters (ADC) Part Context

This component belongs to the ADS8634/ADS8638 family of 12-bit SAR ADCs from Texas Instruments. The ADS8638 specifically offers eight channels, whereas the ADS8634 provides four. Both share identical core architectures, performance characteristics, and pinouts, differing only in channel count. They are designed for robust industrial environments requiring high accuracy and flexibility.

Analog To Digital Converters (ADC) Replacement Considerations

The ADS8634 serves as a functional substitute if only four channels are needed, maintaining identical electrical specifications and pinout compatibility. No other direct cross-model replacements are documented in public sources for this specific part number.