LTC2635HMSE-HMI8#PBF

Overview

The LTC2635HMSE-HMI8#PBF is a quad 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices, housed in a 10-lead MSOP package. 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 utilizes 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 –40°C to 125°C automotive temperature range, and a power-on reset function that defaults outputs to mid-scale.

Feature Summary

• Quad 8-Bit Architecture: Four independent DAC channels with double-buffered data latches for simultaneous or individual updates.
• Integrated Precision Reference: Internal 4.096V full-scale reference with a low drift of ±10ppm/°C; supports external reference input via the REF pin.
• I²C Interface: Communicates via SCL and SDA pins with configurable slave addresses using CA0–CA2 pins; supports 100kHz and 400kHz clock rates.
• Automotive Grade Reliability: Guaranteed monotonic operation across the extended –40°C to 125°C temperature range with ultralow crosstalk (3nV•s).

Applications

• Process Control and Industrial Automation Systems
• Portable Battery-Powered Equipment
• Power Supply Margining and Regulation

Procurement Notes

Verify the specific suffix HMI8 against the manufacturer's current ordering guide to confirm the power-on reset behavior (Mid-Scale in Internal Reference Mode) and resolution (8-Bit). Ensure the 10-lead MSOP package variant matches the PCB footprint requirements. Confirm RoHS compliance status as indicated by the PBF suffix.

Selection Notes

Select this component when four independent 8-bit voltage outputs are required within a compact MSOP footprint. The H-grade designation ensures operation in automotive environments up to 125°C. Choose this part over the L-grade if a higher 4.096V full-scale output is necessary, noting the stricter 4.5V minimum supply voltage requirement compared to the 2.7V minimum of the L-series.

Part Context

This part belongs to the LTC2635 family of quad DACs, which also includes 10-bit and 12-bit variants (LTC2635-10, LTC2635-12). The family shares identical pinouts and interface protocols but differs in resolution, linearity accuracy, and internal reference voltage options (2.5V for L-series, 4.096V for H-series). The MSE package distinguishes it from the QFN-based UD variants.

Replacement Considerations

Direct functional replacements within the same family include LTC2635HMSE-HMI10#PBF (10-bit) and LTC2635HMSE-HMI12#PBF (12-bit), provided higher resolution is acceptable. For different reset behaviors, consider LTC2635HMSE-HZ8#PBF (Zero-Scale reset) or LTC2635HMSE-LMI8#PBF (2.5V Full-Scale). Verify pin compatibility as all share the 10-lead MSOP form factor.