LTC2635CUD-HZ12#PBF

Overview

The LTC2635CUD-HZ12#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 4.096V and operates on a single 4.5V to 5.5V supply. The device communicates via a 2-wire I²C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. Key specifications include rail-to-rail output buffers, guaranteed monotonicity over the operating temperature range, and a maximum integral nonlinearity error of ±2.5 LSB. The unit is housed in a 16-lead 3mm × 3mm QFN package.

Feature Summary

• Quad 12-bit resolution with integrated 4.096V precision reference
• I²C-compatible serial interface with selectable internal or external reference
• Rail-to-rail output buffers and guaranteed monotonic operation
• Power-on reset to zero-scale with low power consumption

Applications

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

Procurement Notes

Verify that the component matches the specified commercial temperature grade (0°C to 70°C) and the 16-pin QFN package configuration. Confirm the presence of the lead-free designation (#PBF) and ensure the ordering suffix aligns with the required power-on reset behavior for zero-scale initialization upon startup.

Selection Notes

Select this part when four independent 12-bit voltage outputs are required within a compact footprint. The H-grade variant is necessary for applications requiring a 4.096V full-scale output, which mandates a minimum supply voltage of 4.5V. Ensure the system design accommodates the specific I²C address selection using the CA0, CA1, and CA2 pins if multiple devices share the bus.

Part Context

This component belongs to the LTC2635 family of DACs, which also includes variants with different resolutions (8-bit, 10-bit), full-scale voltages (2.5V), and package types (MSOP). The 'H' suffix indicates the automotive temperature range capability and higher full-scale voltage, while 'C' denotes the commercial temperature range. The 'UD' suffix specifies the 16-lead QFN package format.

Replacement Considerations

Direct replacements within the same family include the LTC2635CUD-LZ12#PBF for a 2.5V full-scale output or the LTC2635CUD-MI12#PBF for mid-scale power-on reset. For different packages, the LTC2635CMSE-HZ12#PBF offers the same electrical characteristics in a 10-lead MSOP form factor.