LTC2641IMS8-14#PBF

Overview

The Analog Devices LTC2641IMS8-14#PBF is a 14-bit unbuffered voltage output digital-to-analog converter (DAC) housed in an 8-lead MSOP package. It operates from a single 2.7V to 5.5V supply with a typical quiescent current of 120µA. The device features a fast 1µs settling time and a low glitch impulse of 0.5nV•sec. It utilizes a 3-wire SPI/MICROWIRE compatible serial interface supporting clock rates up to 50MHz. Key static performance metrics include ±0.5LSB DNL, ±0.5LSB INL, and a gain error of ±1LSB. The part includes power-on reset functionality that clears the DAC output to zero scale.

Feature Summary

• 14-bit resolution with guaranteed monotonicity over temperature
• Low power consumption of 120µA at 2.7V to 5.5V
• Fast 1µs settling time and 0.5nV•sec glitch impulse
• 3-wire serial interface with 50MHz clock capability

Applications

• Process control and industrial automation
• Automatic test equipment
• Data acquisition systems

Procurement Notes

Verify the specific ordering suffix IMS8 corresponds to the 8-lead MSOP package and #PBF indicates lead-free finish. Confirm the -14 designation matches the required 14-bit resolution variant. Check for RoHS compliance documentation as indicated by the PBF suffix. Ensure the industrial temperature grade (-40°C to +85°C) aligns with system requirements.

Selection Notes

Select this component for applications requiring low power and high precision in a compact footprint. The unbuffered output requires loads greater than 60kΩ to maintain linearity specifications. Consider the LTC2641-16 or LTC2641-12 if higher or lower resolution is needed. Verify interface compatibility with the host microcontroller's SPI mode.

Part Context

This part belongs to the LTC2641/LTC2642 family of 16-, 14-, and 12-bit voltage output DACs. The LTC2641 series provides unipolar output, while the LTC2642 supports bipolar configurations with external amplifiers. Both families share similar electrical characteristics and packaging options, including DFN and MSOP packages.

Replacement Considerations

Direct replacements within the same family include LTC2641IMS8-16#PBF for 16-bit resolution or LTC2641IMS8-12#PBF for 12-bit resolution. Cross-family alternatives like the LTC2634 offer integrated references but differ in channel count and package size.