LTC2640ACTS8-HM12#TRPBF

Overview

The LTC2640ACTS8-HM12#TRPBF 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 utilizes a 3-wire SPI/MICROWIRE compatible interface with clock rates up to 50MHz. Key electrical specifications include a maximum integral nonlinearity (INL) of ±1 LSB, a settling time of 4.6µs at 5V, and a typical supply current of 200µA. It incorporates a power-on reset circuit that sets the output to mid-scale upon initialization.

Feature Summary

• Integrated 10ppm/°C precision reference providing a 4.096V full-scale output
• 12-bit resolution with guaranteed monotonicity and ±1 LSB maximum INL
• 3-wire serial interface supporting clock frequencies up to 50MHz
• Power-on reset function configured to initialize output to mid-scale

Applications

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

Procurement Notes

Verify the specific ordering suffix #TRPBF indicates a 2,500-piece tape and reel packaging configuration. Confirm the H-grade temperature rating (-40°C to +125°C) aligns with system thermal requirements. Ensure the 4.5V minimum supply voltage constraint is met by the design power rails.

Selection Notes

Select this part for applications requiring high accuracy with a fixed 4.096V internal reference range. The H-grade variant is suitable for automotive or harsh industrial environments due to its extended temperature capability. Compare against the L-grade if a lower 2.7V operating voltage or 2.5V output span is required instead.

Part Context

This component belongs to the LTC2640 family of low-power DACs available in 8-, 10-, and 12-bit resolutions. The ACTS8 designation specifies the Automotive grade (H), TSOT-23 package, and 12-bit resolution. Other variants in the series offer different reset behaviors, reference options, and temperature grades to suit diverse design constraints.

Replacement Considerations

Direct pin-compatible substitutes within the same package include other LTC2640 variants such as the LTC2640HCTS8-LM12#TRPBF for 2.5V operation or the LTC2640HCTS8-HZ12#TRPBF for zero-scale reset. Verify that the replacement matches the required supply voltage range and reset state behavior.