LTC2640ITS8-HM12#TRPBF

Overview

The LTC2640ITS8-HM12#TRPBF is a single-channel, 12-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 incorporates 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 serial 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
• 12-bit resolution with ±1 LSB maximum INL and guaranteed monotonicity
• SPI/MICROWIRE compatible 3-wire serial interface with 50MHz clock capability
• Power-on reset to mid-scale and double-buffered data latches

Applications

• Process control and industrial automation systems
• Portable equipment requiring low power operation
• Automatic test equipment
• Optical networking applications

Procurement Notes

Verify the specific suffix #TRPBF indicates a 2,500-piece tape and reel packaging configuration. Confirm that the H-grade designation aligns with the required automotive temperature range of –40°C to 125°C for the intended deployment environment.

Selection Notes

Select this part when a 4.096V internal reference is required, necessitating a minimum supply voltage of 4.5V. Ensure the system design accommodates the 180µA typical supply current at 3V or higher consumption at 5V. Verify compatibility with the 3-wire serial protocol and confirm that mid-scale power-on reset behavior meets system safety requirements.

Part Context

This component belongs to the LTC2640 family of single-channel DACs available in 8-, 10-, and 12-bit resolutions. The 'H' grade specifies the extended temperature range suitable for automotive environments, while the 'M' suffix denotes the mid-scale power-on reset function. The TSOT-23 package provides a compact footprint for space-constrained designs.

Replacement Considerations

Direct substitutes within the same family include the LTC2640ITS8-LM12#TRPBF for a 2.5V full-scale output or the LTC2640ITS8-HZ12#TRPBF if zero-scale power-on reset is preferred instead of mid-scale.