LTC2640ITS8-HZ8#TRMPBF

Overview

The LTC2640ITS8-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 specifications include a maximum integral nonlinearity (INL) error of ±2.5 LSBs, a typical settling time of 4.2µs at 5V, and low power consumption of 200µA at 3V. The part includes a power-on reset circuit that defaults the output to zero-scale and is housed in an 8-lead TSOT-23 package.

Feature Summary

• Integrated 10ppm/°C precision reference with 4.096V full-scale output
• SPI/MICROWIRE compatible 3-wire serial interface supporting up to 50MHz clock
• Power-on reset to zero-scale for consistent system initialization
• Asynchronous DAC clear pin (CLR) for immediate output reset

Applications

• Process control and industrial automation systems
• Portable battery-powered equipment
• Automatic test equipment
• Mobile communications 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 temperature rating (-40°C to 125°C) matches the application environment requirements. Ensure the 4.5V minimum supply voltage aligns with the system power rails, as this variant differs from the L-grade which supports lower voltages.

Selection Notes

Select this model for applications requiring a guaranteed zero-scale power-on state and an external asynchronous clear function. The H-grade designation ensures operation across the automotive temperature range of -40°C to 125°C. Choose this 8-bit resolution variant if system accuracy requirements are met by ±2.5 LSB INL, offering a cost-effective solution compared to the 10-bit or 12-bit versions.

Part Context

This component belongs to the LTC2640 family of single-channel DACs available in 8-, 10-, and 12-bit resolutions. The 'H' suffix denotes the high-temperature grade suitable for automotive and harsh industrial environments, while 'Z' specifies the power-on reset behavior. The 'TS8' package identifies the compact 8-lead ThinSOT form factor designed for space-constrained PCB layouts.

Replacement Considerations

Direct functional replacements within the same family include LTC2640ITS8-LZ8#TRMPBF for lower voltage operation (2.7V–5.5V) or LTC2640ITS8-HM8#TRMPBF for mid-scale power-on reset. Cross-family alternatives require verification of pin compatibility and reference architecture.