LTC2640CTS8-HM8#TRPBF

Overview

The LTC2640CTS8-HM8#TRPBF is a single-channel, 8-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 specifications include a maximum integral nonlinearity (INL) error of ±0.5 LSB, a settling time of 4.2µs at 5V, and a typical supply current of 200µA. The part is housed in an 8-lead TSOT-23 package and includes power-on reset functionality to mid-scale.

Feature Summary

• Integrated 10ppm/°C precision reference with 4.096V full-scale output
• SPI/MICROWIRE compatible 3-wire serial interface supporting up to 50MHz clock
• Power-on reset to mid-scale via REF_SEL pin configuration
• Rail-to-rail output buffer guaranteed monotonic over temperature

Applications

• Mobile Communications
• Process Control and Industrial Automation
• Automatic Test Equipment
• Portable Equipment
• Optical Networking

Procurement Notes

Verify the specific ordering suffix #TRPBF indicates a 2,500-piece tape and reel packaging format as defined in the datasheet. Confirm that the HM designation corresponds to the H-grade automotive temperature range (-40°C to 125°C) and the M designation for mid-scale power-on reset. Ensure compatibility with the required 4.5V to 5.5V supply voltage constraints for the H-series devices.

Selection Notes

Select this component when a compact 8-bit DAC with high accuracy (±0.5 LSB INL) and low power consumption is required. The H-grade variant is suitable for automotive or high-temperature industrial environments requiring operation up to 125°C. The mid-scale reset option (HM) is preferred if downstream circuits must remain inactive during power-up, whereas the LZ variant resets to zero-scale.

Part Context

This part 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 SPI interface architecture. Variations within the family are distinguished by resolution codes (8, 10, 12), full-scale voltage options (L for 2.5V, H for 4.096V), and power-on reset behaviors (Z for zero, M for mid-scale).

Replacement Considerations

Publicly confirmed substitute part numbers are not provided in the source documentation. Designers should consult Analog Devices marketing for information on non-standard lead-based finish parts or alternative packages.