LTC2640ITS8-HM12#TRMPBF

Overview

The LTC2640ITS8-HM12#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 on a single supply voltage ranging from 4.5V to 5.5V. The device utilizes a SPI/MICROWIRE compatible 3-wire serial interface with clock rates up to 50MHz. Key electrical characteristics include a maximum integral nonlinearity (INL) error of ±2.5 LSB, a typical settling time of 4.2µs at ±1LSB, and a supply current of 200µA at 5V. It incorporates a power-on reset circuit that defaults the output to mid-scale.

Feature Summary

• Integrated 10ppm/°C precision reference yielding a 4.096V full-scale output
• SPI/MICROWIRE compatible 3-wire serial interface supporting up to 50MHz clock rates
• Power-on reset to mid-scale for consistent system initialization
• Rail-to-rail output buffer guaranteed monotonic over temperature

Applications

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

Procurement Notes

Verify the specific suffix #TRMPBF indicates a 500-unit tape and reel packaging configuration as defined in the manufacturer's ordering guide. Confirm the H-grade designation corresponds to the automotive temperature range of –40°C to 125°C. Ensure the HM12 code aligns with the required mid-scale power-on reset and 12-bit resolution specifications.

Selection Notes

Select this part when a 4.096V internal reference is required within a 4.5V to 5.5V supply range. The H-grade variant is necessary for applications operating between –40°C and 125°C. Choose the 'M' suffix if a mid-scale power-on reset is preferred over zero-scale. Verify that the 50MHz serial interface speed meets the system timing requirements.

Part Context

This component belongs to the LTC2640 family of single-channel DACs available in 8-, 10-, and 12-bit resolutions. The family shares a common 8-lead TSOT-23 package and low-power architecture. Variations exist based on full-scale voltage (2.5V or 4.096V), temperature grade (C, I, or H), and power-on reset behavior (Zero or Mid-Scale).

Replacement Considerations

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