LTC2640ITS8-HM8#TRPBF

Overview

The LTC2640ITS8-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 4.5V to 5.5V supply. The device includes a rail-to-rail output buffer guaranteed monotonic over temperature, with a maximum integral nonlinearity error of ±1 LSB. It utilizes a 3-wire SPI/MICROWIRE compatible interface supporting clock rates up to 50MHz. Power-on reset options include mid-scale initialization, and the unit is housed in an 8-lead TSOT-23 package.

Feature Summary

• Integrated 10ppm/°C precision reference yielding 4.096V full-scale output
• Rail-to-rail output buffer guaranteed monotonic over temperature
• SPI/MICROWIRE compatible 3-wire serial interface with 50MHz clock rate
• Power-on reset to mid-scale with double-buffered data latches

Applications

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

Procurement Notes

Verify the specific suffix #TRPBF indicates a 2,500-piece tape and reel packaging configuration as defined in the datasheet ordering information. Confirm that the H-grade designation matches the required automotive temperature range of –40°C to 125°C for the intended application environment.

Selection Notes

Select this part when a 4.096V internal reference is required with an 8-bit resolution. Ensure the system supply voltage remains within the 4.5V to 5.5V range specified for the H-grade variant. Consider the HM suffix for mid-scale power-on reset behavior if downstream circuitry requires a non-zero initial state upon startup.

Part Context

This component belongs to the LTC2640 family of single-channel DACs available in 8-, 10-, and 12-bit resolutions. The 'H' grade denotes operation across the extended automotive temperature range, while the 'M' suffix specifies the mid-scale power-on reset function. The 'TS8' indicates the 8-lead ThinSOT plastic package format used for space-constrained designs.

Replacement Considerations

Direct replacements within the same family include LTC2640ITS8-HZ8#TRPBF for zero-scale reset or LTC2640ITS8-HM10#TRPBF for higher 10-bit resolution. Verify pin compatibility and thermal characteristics when substituting between different resolution grades or reset configurations.