LTC2635CUD-LMI12#PBF

Overview

The LTC2635CUD-LMI12#PBF is a quad 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices, housed in a 16-lead 3mm × 3mm QFN package. It features an integrated precision reference providing a 2.5V full-scale output with a temperature coefficient of 10ppm/°C. The device operates on a single supply ranging from 2.7V to 5.5V and includes rail-to-rail output buffers that are guaranteed monotonic over the commercial temperature range of 0°C to 70°C. Communication is handled via a 2-wire I²C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. A power-on reset circuit defaults outputs to mid-scale.

Feature Summary

• Quad 12-bit resolution with maximum Integral Nonlinearity (INL) error of ±2.5 LSB
• Integrated 2.5V precision reference with 10ppm/°C drift
• Rail-to-rail output buffers with ultralow crosstalk (3nV•s)
• Power-on reset configured for mid-scale output in internal reference mode

Applications

• Mobile communications systems
• Process control and industrial automation
• Portable equipment requiring low power consumption

Procurement Notes

Verify the specific suffix #PBF confirms lead-free construction and tape-and-reel packaging specifications. Confirm the C-grade designation aligns with the required 0°C to 70°C operating temperature range for the target application environment.

Selection Notes

Select this part when four independent 12-bit channels are required within a compact footprint. The L-series variant is appropriate for designs needing a 2.5V full-scale span with a wide 2.7V to 5.5V supply range. Ensure the system requires mid-scale initialization upon power-up rather than zero-scale or high-impedance states.

Part Context

This component belongs to the LTC2635 family, which also offers 10-bit and 8-bit resolutions, as well as H-grade automotive variants with 4.096V full-scale outputs. The 'UD' suffix identifies the 16-pin QFN package, while 'MSE' denotes the 10-lead MSOP option. The 'LMI12' code specifies the 12-bit resolution, 2.5V internal reference, and mid-scale power-on reset behavior.

Replacement Considerations

Direct replacements within the same family include LTC2635CUD-LZ12#PBF for zero-scale reset or LTC2635CUD-MI12#PBF if external reference operation is preferred. For different packages, the MSE equivalent is LTC2635CMSE-LMI12#PBF.