LTC2640AITS8-HM12#TRMPBF

Overview

The LTC2640AITS8-HM12#TRMPBF is a single-channel, 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features an integrated precision reference yielding 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, a typical settling time of 4.2µs at 5V, and a power-on reset function that initializes the output to mid-scale. It is housed in an 8-lead TSOT-23 package.

Feature Summary

• Integrated 4.096V precision reference with 10ppm/°C temperature coefficient
• High accuracy: Maximum INL error of ±1LSB for the A-grade device
• Power-on reset to mid-scale via REF_SEL pin configuration
• Low power consumption: 200µA operating current at 5V

Applications

• Mobile communications systems
• Process control and industrial automation
• Automatic test equipment
• Portable battery-powered equipment
• Automotive applications

Procurement Notes

Verify the specific suffix #TRMPBF indicates a 500-unit tape and reel packaging quantity as defined in the datasheet ordering information. Confirm the H-grade designation corresponds to the automotive temperature range of –40°C to 125°C. Ensure the HM12 suffix correctly identifies the 12-bit resolution and mid-scale power-on reset behavior before procurement.

Selection Notes

Select this part when a 4.096V full-scale output is required with high linearity accuracy (±1LSB). The H-grade temperature range is necessary for automotive or harsh environment applications requiring operation up to 125°C. Choose this over the L-grade if the system supply voltage is strictly between 4.5V and 5.5V, as the L-grade supports lower voltages down to 2.7V but offers only 2.5V full scale.

Part Context

This component belongs to the LTC2640 family of single-channel DACs. The 'A' denotes the electrical grade with ±1LSB maximum INL. The 'I' specifies the industrial temperature range (-40°C to 85°C), while 'H' in the full-scale section typically denotes the higher voltage range; however, the datasheet lists H-grade as -40°C to 125°C. The 'TS8' indicates the 8-lead TSOT-23 package. This specific variant combines the high-accuracy A-grade with the mid-scale reset option.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.