ADS7841ES

Analog To Digital Converters (ADC) Overview

The ADS7841ES is a 12-bit, four-channel serial output sampling Analog-to-Digital Converter (ADC) manufactured by Texas Instruments. It operates on a single supply voltage ranging from 2.7V to 5.25V and supports a maximum throughput rate of 200kHz. The device features an internal multiplexer allowing for four single-ended or two differential input channels. It utilizes a Successive Approximation Register (SAR) architecture with a synchronous serial interface compatible with standard SPI protocols. The ADS7841ES is specifically designated for operation across an extended temperature range of –40°C to +125°C.

Analog To Digital Converters (ADC) Feature Summary

• Extended industrial temperature rating up to +125°C
• Integrated four-channel analog multiplexer supporting single-ended and differential configurations
• Low power consumption with dedicated shutdown mode reducing dissipation below 15µW
• Programmable resolution between 8-bit and 12-bit via digital control

Analog To Digital Converters (ADC) Applications

• Battery-powered portable measurement equipment
• Industrial process control systems requiring high-temperature stability
• Personal digital assistants and handheld data loggers
• Remote data acquisition nodes utilizing serial isolation

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific ES suffix indicates the +125°C operating grade during procurement. Confirm package availability in SSOP-16 format. Ensure ordering codes match the required tape and reel quantities if automated assembly is planned. Cross-reference datasheet revision dates to confirm parameter consistency.

Analog To Digital Converters (ADC) Selection Notes

Select the ADS7841ES when application environments exceed standard commercial temperature limits. Consider the external reference requirement as the input span is VREF dependent. Evaluate system clock constraints against the 16-clock cycle minimum per conversion for standard microcontrollers. Verify that the CMOS logic levels are compatible with the host processor I/O voltages.

Analog To Digital Converters (ADC) Part Context

The ADS7841ES belongs to the broader ADS7841 family of low-power, high-speed ADCs. While other variants like the E and EB grades are limited to +85°C, the ES grade provides the same electrical performance but extends the specified operating junction temperature to +125°C. This makes it suitable for harsh industrial environments where standard commercial parts would fail thermal specifications.

Analog To Digital Converters (ADC) Replacement Considerations

The datasheet identifies the MAX1247 as an alternate source offering equivalent functionality. When substituting, verify pin compatibility and ensure the replacement component supports the required +125°C temperature range if the ES grade specification is critical.