LTC2640HTS8-HZ8#TRPBF

Overview

The LTC2640HTS8-HZ8#TRPBF 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 4.1µs at ±1LSB for the 8-bit resolution, a maximum integral nonlinearity (INL) error of ±0.5LSB, and a power-down current of 4µA maximum in the H-grade temperature variant. It is housed in an 8-lead TSOT-23 package.

Feature Summary

• Integrated 4.096V precision reference with 10ppm/°C temperature coefficient
• SPI/MICROWIRE compatible 3-wire serial interface supporting up to 50MHz clock
• Asynchronous DAC Clear pin (Pin 8) resets output to zero-scale
• Power-on reset circuitry defaults output to zero-scale

Applications

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

Procurement Notes

Verify the specific suffix #TRPBF indicates a 2,500-piece tape and reel packaging configuration as defined in the datasheet ordering information. Confirm that the H-grade designation corresponds to the automotive temperature range of –40°C to +125°C. Ensure the HTS8 package type matches the required 8-lead plastic TSOT-23 footprint for the target PCB layout.

Selection Notes

Select this component when a single-channel DAC with a fixed 4.096V internal reference is required. The H-grade is necessary for applications operating between –40°C and +125°C. The Z-suffix ensures the output initializes to zero upon power-up, which is critical for safety in systems where downstream circuits are active during startup. Verify that the 4.5V minimum supply voltage aligns with the system power rails.

Part Context

This part belongs to the LTC2640 family of single-channel DACs available in 8-, 10-, and 12-bit resolutions. The 'H' grade distinguishes it from Commercial (C) and Industrial (I) grades by offering extended temperature capability. The 'Z' suffix differentiates it from 'M' variants by specifying a Zero-Scale power-on reset rather than Mid-Scale. The 8-bit resolution offers a balance between cost, speed, and accuracy for less demanding analog control loops.

Replacement Considerations

Direct functional replacements within the same package and specification profile include other LTC2640 variants such as LTC2640HTS8-LZ8 or LTC2640ITS8-HZ8, provided the temperature grade and reset behavior match the design requirements. Cross-family replacements like the AD5060 series require verification of pin compatibility and reference architecture differences.