LTC2640HTS8-LZ8#TRMPBF

Overview

The LTC2640HTS8-LZ8#TRMPBF is a single-channel, 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features an integrated precision reference with a full-scale output of 4.096V and operates on a 4.5V to 5.5V supply. The device includes a rail-to-rail output buffer guaranteed monotonic over temperature. It utilizes a 3-wire SPI/MICROWIRE compatible interface with clock rates up to 50MHz. Key specifications include a maximum integral nonlinearity (INL) of ±2.5 LSB, a typical settling time of 4.2µs at ±1LSB, and a power-down current of 4µA maximum. The part is housed in an 8-lead TSOT-23 package.

Feature Summary

• Integrated 10ppm/°C precision reference providing 4.096V full-scale output
• Rail-to-rail output buffer guaranteed monotonic over the operating temperature range
• Asynchronous DAC Clear pin (Pin 8) resets output to zero-scale
• Power-on reset circuit forces output to zero-scale upon initialization

Applications

• Process control and industrial automation systems
• Portable battery-powered equipment
• Automatic test equipment
• Mobile communications devices

Procurement Notes

Verify the H-grade designation confirms operation within the –40°C to 125°C automotive temperature range. Confirm the LZ suffix indicates the internal reference mode with zero-scale power-on reset behavior. Ensure the TRMPBF suffix corresponds to the 500-unit tape and reel packaging format specified for this variant.

Selection Notes

Select this model when a 4.096V output span is required with a minimum supply voltage of 4.5V. The H-grade is necessary for applications exceeding 85°C. The LZ suffix provides automatic zeroing at power-up, eliminating the need for external reset logic. Verify that the 8-bit resolution meets system accuracy requirements given the ±2.5 LSB INL specification.

Part Context

This component belongs to the LTC2640 family of single-channel DACs available in 8-, 10-, and 12-bit resolutions. The HTS8-LZ8 configuration specifically denotes the high-temperature grade, 8-bit resolution, and zero-reset functionality. Other variants in the series include L-grade parts for lower voltage operation and M-grade parts for mid-scale reset options.

Replacement Considerations

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