LTC2635CUD-LMX12#PBF

Overview

The LTC2635CUD-LMX12#PBF is a quad 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features an integrated precision reference with a full-scale output of 2.5V and a temperature coefficient of 10ppm/°C. The device operates on a single supply ranging from 2.7V to 5.5V and utilizes a 2-wire I²C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. Key electrical specifications include a maximum integral nonlinearity error of ±2.5 LSB, low noise of 0.75mV peak-to-peak (0.1Hz to 200kHz), and guaranteed monotonicity over the operating temperature range. The part incorporates rail-to-rail output buffers and double-buffered data latches.

Feature Summary

• Quad 12-bit resolution with integrated 2.5V precision reference (10ppm/°C drift)
• Power-on reset configured for mid-scale output in external reference mode
• Ultralow DAC-to-DAC crosstalk of 3nV•s and low power consumption (0.6mA at 3V)
• Available in a compact 16-pin 3mm × 3mm QFN package

Applications

• Mobile communications systems
• Process control and industrial automation
• Power supply margining
• Portable equipment
• Automotive applications

Procurement Notes

Verify that the ordering suffix #PBF confirms lead-free construction. Confirm the UD package designation corresponds to the 16-pin QFN form factor. Ensure the LMX12 code matches the required mid-scale power-on reset behavior for external reference configurations. Cross-check the C temperature grade against specific thermal requirements.

Selection Notes

Select this component when four independent 12-bit channels are required within a small footprint. The LMX12 variant is appropriate if the system design mandates a mid-scale output state upon power-up while utilizing an external reference voltage. Verify that the 2.7V to 5.5V supply range aligns with the target application's power architecture.

Part Context

This part belongs to the LTC2635 family, which includes 8-bit, 10-bit, and 12-bit variants. The 'L' suffix indicates a 2.5V full-scale internal reference, distinguishing it from the 'H' series which provides 4.096V. The 'UD' suffix specifies the 16-pin QFN package, whereas 'MSE' denotes the 10-lead MSOP option.

Replacement Considerations

Public confirmed substitute part numbers: None.