LTC2640HTS8-HM8#TRPBF

Overview

The LTC2640HTS8-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 includes a rail-to-rail output buffer guaranteed monotonic over temperature. It utilizes a 3-wire SPI/MICROWIRE compatible serial interface with clock rates up to 50MHz. Power-on reset options allow the output to initialize to mid-scale. The component is housed in an 8-lead TSOT-23 package and supports operation across an extended temperature range of –40°C to 125°C.

Feature Summary

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

Applications

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

Procurement Notes

Verify the specific ordering suffix #TRPBF corresponds to the required tape and reel packaging quantity as defined by the manufacturer's standard specifications. Confirm that the H-grade temperature rating aligns with the thermal requirements of the target application environment. Ensure the 4.5V minimum supply voltage constraint is met by the system power rails.

Selection Notes

Select this part when a 4.096V full-scale output is required with an internal reference source. The H-grade variant is necessary for applications operating between –40°C and 125°C. Compare settling time specifications against system speed requirements, noting that 8-bit accuracy allows for faster conversion cycles compared to higher-resolution variants within the same family.

Part Context

This component belongs to the LTC2640 family of single-channel DACs available in 8-, 10-, and 12-bit resolutions. The 'H' designation indicates the automotive temperature grade, while 'M' specifies the mid-scale power-on reset behavior. The 'TS8' denotes the 8-lead ThinSOT package type. Other variants in the series include L-grade parts with lower supply voltage requirements and Z-grade parts with zero-scale reset capabilities.

Replacement Considerations

Direct replacements within the same family include the LTC2640ITS8-HM8#TRPBF if industrial temperature range suffices, or the LTC2640CTS8-HM8#TRPBF for commercial applications. Verify pin compatibility and software command set alignment when substituting with other members of the LTC2640 series.