LTC2634CUD-LMI12#TRPBF

Overview

The LTC2634CUD-LMI12#TRPBF is a quad 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices Inc. It features an integrated precision reference with a full-scale output of 2.5V and operates on a single 2.7V to 5.5V supply. The device utilizes a 3-wire SPI/MICROWIRE compatible serial interface with clock rates up to 50MHz. Key electrical specifications include a maximum integral nonlinearity error of ±2.5 LSB, a settling time of 4.2µs at 12 bits, and low power consumption of 0.6mA at 3V. It is housed in a 16-lead 3mm × 3mm QFN package and guarantees monotonicity over the operating temperature range.

Feature Summary

• Quad 12-bit DACs with integrated 10ppm/°C precision reference
• Rail-to-rail output buffers with selectable internal or external reference modes
• Power-on reset to mid-scale in internal reference mode
• SPI/MICROWIRE compatible 3-wire serial interface

Applications

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

Procurement Notes

Verify the specific ordering suffix #TRPBF indicates a tape and reel quantity of 2,500 pieces. Confirm the C grade corresponds to the commercial temperature range of 0°C to 70°C. Ensure the LMI12 designation matches the required 2.5V full-scale output and mid-scale power-on reset behavior for the target application design.

Selection Notes

Select this part when a quad 12-bit DAC with high accuracy and low drift is required. The LMI12 variant is appropriate for systems needing a 2.5V full-scale range powered by a single 2.7V to 5.5V supply. Consider the H-grade variants if automotive temperature ranges (-40°C to 125°C) are necessary, or the H-series parts if a 4.096V full-scale output is preferred.

Part Context

This component belongs to the LTC2634 family, which includes 8-, 10-, and 12-bit resolutions in both QFN and MSOP packages. The CUD suffix denotes the commercial temperature grade and 16-lead QFN package. The LMI12 code specifies the 2.5V full-scale voltage and mid-scale reset configuration in internal reference mode.

Replacement Considerations

Direct pin-compatible replacements within the same package include other LTC2634 variants such as LTC2634CUD-LZ12#PBF (zero-scale reset) or LTC2634CUD-HMI12#PBF (automotive grade). Verify that the replacement matches the required resolution, full-scale voltage, and power-on reset state.