LTC2640AHTS8-HM12#TRMPBF

Overview

The LTC2640AHTS8-HM12#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 on a single supply voltage ranging from 4.5V to 5.5V. The device utilizes a 3-wire SPI/MICROWIRE compatible serial interface with clock rates up to 50MHz. Key electrical specifications include a maximum integral nonlinearity (INL) error of ±1LSB for the A-grade variant, a settling time of 4.6µs at ±1LSB, and a typical supply current of 200µA. It incorporates a power-on reset circuit that initializes the output to mid-scale.

Feature Summary

• 12-bit resolution with ±1LSB maximum INL error
• Integrated 4.096V full-scale reference with 10ppm/°C drift
• Power-on reset to mid-scale via REF_SEL pin
• Rail-to-rail output buffer guaranteed monotonic

Applications

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

Procurement Notes

Verify the specific ordering suffix #TRMPBF indicates a 500-piece tape and reel packaging quantity. Confirm the H-grade temperature rating (-40°C to 125°C) matches the application requirements. Ensure the 4.5V minimum supply voltage constraint is compatible with the system power architecture before procurement.

Selection Notes

Select this part when a high-accuracy 12-bit DAC with a fixed 4.096V internal reference is required in a compact TSOT-23 package. The H-grade variant is necessary for automotive or extended industrial temperature ranges. Compare against the LZ suffix variants if a zero-scale power-on reset is preferred over the mid-scale reset provided by the HM suffix.

Part Context

This component belongs to the LTC2640 family of single-channel DACs available in 8-, 10-, and 12-bit resolutions. The 'A' designation specifies the highest accuracy grade with ±1LSB INL. The 'H' suffix denotes the automotive temperature range, while 'TS8' identifies the 8-lead ThinSOT package. This specific part number combines the high-accuracy grade with the extended temperature range and mid-scale reset configuration.

Replacement Considerations

Direct replacements within the same family include LTC2640AHZ12#TRMPBF for zero-scale reset or LTC2640AHTS8-LM12#TRMPBF for 2.5V full-scale output. Cross-family replacements require verification of pin compatibility and reference voltage constraints.