LTC2640AHTS8-LZ12#TRMPBF

Overview

The LTC2640AHTS8-LZ12#TRMPBF is a single-channel, 12-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 within a supply voltage range of 4.5V to 5.5V. The device incorporates a rail-to-rail output buffer guaranteed monotonic over temperature, with a maximum integral nonlinearity error of ±1LSB. It utilizes a SPI/MICROWIRE compatible 3-wire serial interface supporting clock rates up to 50MHz. Key specifications include a settling time of 4.6µs at ±1LSB, low power consumption of 200µA at 5V, and operation across the automotive temperature range of –40°C to 125°C.

Feature Summary

• Integrated 4.096V precision reference with 10ppm/°C temperature coefficient
• Maximum INL error of ±1LSB for 12-bit resolution
• SPI/MICROWIRE compatible 3-wire serial interface with 50MHz clock rate
• Power-on reset to zero-scale via asynchronous CLR pin

Applications

• Mobile Communications
• Process Control and Industrial Automation
• Automatic Test Equipment
• Portable Equipment
• Automotive Systems

Procurement Notes

Verify the H-grade designation confirms the –40°C to 125°C operating range and 4.5V minimum supply requirement. Confirm the LZ suffix indicates the Zero-Scale power-on reset option and the presence of the CLR pin on Pin 8. Ensure the #TRMPBF suffix corresponds to the 500-unit tape and reel packaging format specified in the ordering information.

Selection Notes

Select this part when a 4.096V full-scale output is required with high accuracy (±1LSB INL). The H-grade is necessary for automotive or high-temperature environments exceeding 85°C. The LZ variant is suitable for systems requiring a defined zero-state upon power-up. Verify that the system supply voltage remains above 4.5V to ensure specified performance.

Part Context

This component belongs to the LTC2640 family of single-channel DACs available in 8-, 10-, and 12-bit resolutions. The A grade denotes the highest linearity specification within the family. The TSOT-23 package provides a compact footprint for space-constrained designs. Other variants in the series offer different full-scale voltages (2.5V), reset behaviors (Mid-Scale), and temperature grades (C and I).

Replacement Considerations

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