LTC2640HTS8-HM8#TRMPBF

Overview

The LTC2640HTS8-HM8#TRMPBF 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. Key specifications include a typical settling time of 4.2µs at ±1LSB, a maximum integral nonlinearity error of ±0.5LSB, and low power consumption of 200µA at 3V equivalent operation. The part is housed in an 8-lead TSOT-23 package.

Feature Summary

• Integrated 10ppm/°C precision reference yielding 4.096V full-scale output
• 8-bit resolution with ±0.5LSB maximum INL and ±0.5LSB DNL
• SPI/MICROWIRE compatible 3-wire serial interface supporting 50MHz clock
• Power-on reset to mid-scale code with double-buffered data latches

Applications

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

Procurement Notes

Verify the specific suffix #TRMPBF indicates a 500-piece tape and reel packaging configuration as defined in the manufacturer's ordering guide. Confirm that the H-grade designation aligns with the required automotive temperature range of –40°C to 125°C for the target application environment.

Selection Notes

Select this component when a 4.096V internal reference is required within a compact TSOT-23 footprint. Ensure the system supply voltage remains between 4.5V and 5.5V to meet electrical specifications. Consider the HM suffix if a mid-scale power-on reset state is preferred over zero-scale initialization for downstream circuit protection.

Part Context

This part belongs to the LTC2640 family of single-channel DACs available in 8-, 10-, and 12-bit resolutions. The 'H' grade denotes extended temperature capability suitable for automotive applications, while the 'M' suffix specifies the power-on reset behavior. The device shares the same pinout and interface protocol with other variants in the series, differing primarily in resolution, accuracy grade, and reset vector.

Replacement Considerations

Direct functional substitutes within the same package and specification profile include the LTC2640ITS8-HM8#TRMPBF for industrial temperature ranges or the LTC2640CTS8-HM8#TRMPBF for commercial ranges. Verify that the replacement part maintains the 4.096V full-scale output and mid-scale reset characteristics.