LTC2640HTS8-HZ8#TRMPBF

Overview

The LTC2640HTS8-HZ8#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 full-scale output of 4.096V and operates within a supply voltage range of 4.5V to 5.5V. The device utilizes a SPI/MICROWIRE compatible 3-wire serial interface with clock rates up to 50MHz. Key electrical specifications include a settling time of 4.2µs at ±1LSB, a maximum integral nonlinearity (INL) error of ±0.5LSB, and a differential nonlinearity (DNL) of ±0.5LSB. It incorporates a power-on reset circuit that defaults the output to zero-scale upon initialization.

Feature Summary

• Integrated 10ppm/°C precision reference yielding a 4.096V full-scale output
• Asynchronous DAC Clear pin (Pin 8) for immediate zero-scale reset
• SPI/MICROWIRE compatible 3-wire serial interface supporting up to 50MHz clock
• Rail-to-rail output buffer guaranteed monotonic over temperature

Applications

• Process control and industrial automation systems
• Portable battery-powered equipment
• Automatic test equipment
• Optical networking devices

Procurement Notes

Verify the specific suffix #TRMPBF indicates a 500-unit tape and reel packaging configuration as defined in the manufacturer's ordering guide. Confirm the H-grade designation corresponds to the automotive temperature range of –40°C to +125°C. Ensure the Z-power-on reset option aligns with system startup requirements for zero-scale initialization.

Selection Notes

Select this component when a compact 8-lead TSOT-23 package is required alongside high accuracy and low power consumption. The H-grade variant is suitable for environments requiring operation up to 125°C. The internal 4.096V reference eliminates the need for external reference components, simplifying board layout compared to external reference modes.

Part Context

This part belongs to the LTC2640 family of single-channel DACs available in 8-, 10-, and 12-bit resolutions. The HTS8-HZ8 designation specifies the 8-bit resolution, ThinSOT-23 package, H-temperature grade, and Zero-scale power-on reset feature. Other variants in the series offer different reset behaviors or full-scale voltages.

Replacement Considerations

Direct functional replacements within the same package and specification profile are limited due to the unique combination of the H-grade temperature rating and the asynchronous CLR pin. Verify compatibility with existing PCB footprints if substituting with other LTC2640 variants.