LTC2635HMSE-HMI12#PBF

Overview

The LTC2635HMSE-HMI12#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 a temperature coefficient of 10ppm/°C. The device operates on a single supply ranging from 4.5V to 5.5V and communicates via a 2-wire I²C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. It includes rail-to-rail output buffers, guaranteed monotonicity over the –40°C to 125°C automotive temperature range, and a power-on reset circuit configured to reset outputs to mid-scale in internal reference mode.

Feature Summary

• Quad 12-bit resolution with maximum integral nonlinearity error of ±2.5 LSB
• Integrated 4.096V precision reference with 10ppm/°C drift
• I²C-compatible serial interface with selectable slave addresses
• Power-on reset to mid-scale with rail-to-rail buffered outputs

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 and RoHS compliance. Confirm the MSE package designation corresponds to the 10-lead MSOP form factor required for the specific PCB layout. Ensure the H-grade specification matches the intended operating environment requiring performance across the –40°C to 125°C temperature range.

Selection Notes

Select this part when a 4.096V full-scale output is required, as it necessitates a minimum supply voltage of 4.5V. Choose the HMI12 variant specifically if the design requires the DAC outputs to initialize at mid-scale upon power-up rather than zero-scale or high-impedance states. Verify that the system logic levels are compatible with the specified I²C input voltage thresholds.

Part Context

This component belongs to the LTC2635 family of quad DACs, which also includes variants with 10-bit and 8-bit resolutions. The family shares common architectural features such as low crosstalk and low power consumption but differs in supply voltage requirements based on the internal reference voltage. The HMSE suffix indicates the specific combination of automotive temperature grade, mid-scale reset configuration, and MSOP packaging.

Replacement Considerations

Direct substitutes within the same family include the LTC2635HMSE-LMI12#PBF, which offers the same package and temperature grade but resets to mid-scale using an external reference. Other options include the LTC2635HMSE-HZ12#PBF for zero-scale reset or the LTC2635HMSE-HMO12#PBF for high-impedance reset upon power-up.