LTC2634CMSE-HMI12#TRPBF

Overview

The LTC2634CMSE-HMI12#TRPBF is a quad 12-bit voltage output digital-to-analog converter (DAC) in a 10-lead MSOP package. It features an integrated precision reference providing a 4.096V full-scale output, requiring a 4.5V to 5.5V supply. The device includes rail-to-rail output buffers and guarantees monotonicity over the –40°C to 85°C temperature range. Communication occurs via a 50MHz SPI/MICROWIRE compatible 3-wire serial interface. Upon power-up, the outputs reset to mid-scale (2.048V). Key specifications include ±2.5 LSB maximum integral nonlinearity, 4.2µs settling time, and low crosstalk of 2.4nV•s between channels.

Feature Summary

• Quad 12-bit resolution with integrated 4.096V precision reference
• Rail-to-rail output buffers guaranteed monotonic from –40°C to 85°C
• 50MHz SPI-compatible 3-wire serial interface
• Power-on reset to mid-scale (2.048V) in internal reference mode

Applications

• Mobile communications
• Process control and industrial automation
• Automatic test equipment
• Portable equipment
• Automotive systems

Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging containing 2,500 pieces. Confirm the MSE designation corresponds to the 10-lead MSOP package type. Ensure the H grade matches the required 4.5V to 5.5V supply range and 4.096V full-scale output for the design.

Selection Notes

Select this part when four independent 12-bit DACs are required in a compact surface-mount package. The H-grade variant is necessary for 4.096V full-scale applications, unlike the L-grade which provides 2.5V. The MI suffix ensures a safe mid-scale power-on state. Verify that the system supply voltage remains within the 4.5V to 5.5V window for specified performance.

Part Context

This component belongs to the LTC2634 family, which offers 12-, 10-, and 8-bit resolutions in both 16-lead QFN and 10-lead MSOP packages. The CMSE-HMI12 configuration specifically utilizes the commercial temperature grade (C), MSOP package (MSE), high full-scale voltage (H), and mid-scale internal reset (MI). Other variants exist with different reset behaviors or external reference modes.

Replacement Considerations

Direct replacements within the same family include LTC2634IMSE-HMI12#TRPBF for industrial temperature range (-40°C to 85°C) or LTC2634HUD-HMI12#TRPBF for automotive temperature range (-40°C to 125°C) in a QFN package. Cross-family substitutes like the LTC2654 offer higher resolution but differ in pinout and package.