LTC2640AITS8-LM12#TRMPBF

Overview

The LTC2640AITS8-LM12#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 2.5V and operates on a single supply voltage ranging from 2.7V to 5.5V. The device utilizes a SPI/MICROWIRE compatible 3-wire serial interface with clock rates up to 50MHz. Key electrical specifications include a maximum integral nonlinearity (INL) error of ±1 LSB, a typical settling time of 4.1µs at 3V, and a supply current of 180µA at 3V. It incorporates a power-on reset circuit that defaults the output to mid-scale.

Feature Summary

• Integrated Precision Reference: Provides a stable 2.5V full-scale output with a temperature coefficient of 10ppm/°C.
• High Accuracy: Achieves a maximum Integral Nonlinearity (INL) error of ±1 LSB for the A-grade device.
• Low Power Consumption: Draws 180µA at 3V in normal operation and reduces to 1.8µA maximum in power-down mode.
• Flexible Reset Options: Includes a power-on reset function that sets the DAC output to mid-scale upon initialization.

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 'I' temperature grade corresponds to the industrial range of –40°C to 85°C. Ensure the 'TS8' package designation matches the required 8-lead ThinSOT form factor for the target PCB layout.

Selection Notes

Select this part when a single-channel 12-bit DAC with high accuracy (±1 LSB INL) is required in a compact TSOT-23 package. Choose the LM suffix if a mid-scale power-on reset state is preferred over zero-scale. Verify that the system supply voltage remains within the 2.7V to 5.5V range suitable for the L-series full-scale output.

Part Context

This component belongs to the LTC2640 family of single-channel DACs available in 12-, 10-, and 8-bit resolutions. The family shares a common architecture featuring an integrated low-drift reference and SPI interface. Variants differ by resolution, power-on reset behavior (Mid-Scale vs. Zero), and full-scale voltage options (2.5V or 4.096V).

Replacement Considerations

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