LTC2631ITS8-HM12#TRPBF

Overview

The LTC2631ITS8-HM12#TRPBF is a single-channel, 12-bit voltage-output digital-to-analog converter (DAC) manufactured by Analog Devices Inc. It features an integrated precision reference with a full-scale output of 4.096V and operates within a supply voltage range of 4.5V to 5.5V. The device utilizes a 2-wire I²C-compatible serial interface supporting clock rates up to 400kHz. Key electrical specifications include a maximum Integral Nonlinearity (INL) error of ±1 LSB, a typical settling time of 4.6µs at ±1LSB accuracy, and a power-on reset function that defaults the output to mid-scale. It is housed in an 8-lead TSOT-23 package and supports operation from –40°C to 125°C.

Feature Summary

• Integrated 10ppm/°C precision reference providing a 4.096V full-scale output
• Bidirectional REF pin allows for internal reference output or external reference input
• Power-on reset circuit configured to initialize DAC output to mid-scale
• Guaranteed monotonic performance over the full operating temperature range

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 indicates a standard tape and reel packaging configuration containing 2,500 units. Confirm the 'H' grade designation matches the required automotive temperature range of –40°C to 125°C. Ensure the 'M' suffix aligns with system requirements for mid-scale power-on reset behavior rather than zero-scale initialization.

Selection Notes

Select this part when a 12-bit resolution and high accuracy (±1LSB INL) are required in a compact 8-lead TSOT-23 footprint. The H-grade variant is necessary for applications exceeding 85°C. Verify that the minimum 4.5V supply requirement fits the system design, as the L-grade variant supports lower voltages down to 2.7V but offers only 2.5V full-scale output.

Part Context

This component belongs to the LTC2631 family of single-channel I²C DACs. Variants within the family differ by resolution (8, 10, or 12 bits), full-scale voltage (2.5V or 4.096V), and power-on reset state (zero or mid-scale). The ITS8-HM12 designation specifically identifies the Industrial/Automotive temperature grade, 12-bit resolution, and mid-scale reset configuration.

Replacement Considerations

Direct functional substitutes within the same package and specification profile include other LTC2631 variants such as the LTC2631ITS8-LM12#TRPBF for lower voltage applications or the LTC2631ITS8-HZ12#TRPBF if zero-scale reset is preferred. Cross-family replacements require verification of pin compatibility and interface protocols.