LTC2640ACTS8-HZ12#TRMPBF

Overview

The LTC2640ACTS8-HZ12#TRMPBF is a single-channel, 12-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 incorporates a rail-to-rail output buffer guaranteed monotonic over temperature. It utilizes a 3-wire SPI/MICROWIRE compatible serial interface with clock rates up to 50MHz. Key specifications include a maximum integral nonlinearity (INL) error of ±1 LSB for the A-grade variant, a settling time of 4.6µs at 5V, and power-on reset functionality that clears the output to zero-scale upon initialization.

Feature Summary

• Integrated 10ppm/°C precision reference with 4.096V full-scale output
• Rail-to-rail output buffer guaranteed monotonic over temperature
• Maximum INL error of ±1 LSB (A-Grade) with 12-bit resolution
• Power-on reset circuit clears DAC output to zero-scale

Applications

• Process control and industrial automation systems
• Automatic test equipment requiring precise voltage generation
• Portable battery-powered instrumentation
• Optical networking signal conditioning

Procurement Notes

Verify the specific ordering suffix #TRMPBF indicates a 500-piece tape and reel packaging quantity as defined in the manufacturer's documentation. Confirm the H-grade temperature rating (-40°C to 125°C) matches the operational environment requirements. Ensure the C-grade or I-grade alternatives are not required if lower thermal limits suffice, as these may offer different power-down current characteristics.

Selection Notes

Select this part when a 4.096V internal reference is preferred over external components to save board space. The H-grade temperature range is suitable for automotive or harsh industrial environments. For applications requiring mid-scale power-on reset instead of zero-scale, substitute the Z suffix with M. Verify that the system supply voltage remains between 4.5V and 5.5V to ensure specified performance levels.

Part Context

This component belongs to the LTC2640 family of single-channel DACs available in 8-, 10-, and 12-bit resolutions. The ACTS8 designation specifies the A-grade accuracy, TSOT-23 package, and commercial/industrial/automotive temperature grading depending on the middle letter. The LZ12 suffix defines the 12-bit resolution, zero-scale power-on reset, and 4.096V full-scale voltage configuration.

Replacement Considerations

Publicly confirmed substitutes within the same family include LTC2640MCTS8-HZ12#TRMPBF for mid-scale reset behavior and LTC2640IPTS8-HZ12#TRMPBF for industrial temperature range operation. Cross-family replacements like the LTC2641 require evaluation of pin compatibility and package differences.