LTC2640HTS8-LM8#TRMPBF

Overview

The LTC2640HTS8-LM8#TRMPBF is a single-channel, 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features an integrated precision reference providing a 2.5V full-scale output and operates on a single 2.7V to 5.5V supply. The device utilizes a 3-wire SPI/MICROWIRE compatible interface with clock rates up to 50MHz. Key electrical characteristics include a typical settling time of 3.2µs, ±0.5LSB differential nonlinearity, and ±0.05LSB integral nonlinearity. It incorporates a power-on reset circuit that defaults the output to mid-scale and offers low power consumption of 180µA at 3V.

Feature Summary

• Integrated 10ppm/°C precision reference with 2.5V full-scale output
• Rail-to-rail output buffer guaranteed monotonic over temperature
• 3-wire serial interface supporting clock rates up to 50MHz
• Power-on reset to mid-scale with double-buffered data latches

Applications

• Mobile communications
• Process control and industrial automation
• Automatic test equipment
• Portable equipment
• Optical networking

Procurement Notes

Verify the specific ordering suffix #TRMPBF indicates a 500-piece tape and reel packaging configuration. Confirm the H-grade temperature rating (-40°C to 125°C) matches the application requirements. Ensure the LM suffix for mid-scale power-on reset is appropriate for the system initialization sequence.

Selection Notes

Select this component when an 8-bit resolution is sufficient for the application. The LM suffix provides a mid-scale reset upon power-up, whereas the LZ suffix resets to zero-scale. The H-grade variant supports automotive temperature ranges up to 125°C. Verify that the 2.5V internal reference range meets the required output span or consider external reference mode if higher voltages are needed.

Part Context

This part belongs to the LTC2640 family of single-channel DACs available in 8-, 10-, and 12-bit resolutions. The HTS8 designation identifies the high-temperature grade housed in an 8-lead TSOT-23 package. Other variants in the series differ by resolution, power-on reset behavior, and operating temperature ranges.

Replacement Considerations

Publicly confirmed substitute part numbers are not provided in the source documentation.