LTC2636HMS-HZ12#PBF

Overview

The LTC2636HMS-HZ12#PBF is an octal 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 includes rail-to-rail output buffers, guaranteed monotonicity over the –40°C to 125°C automotive temperature range, and a 3-wire SPI/MICROWIRE-compatible serial interface. Power-on reset defaults to zero-scale in internal reference mode.

Feature Summary

• Octal architecture with 12-bit resolution and 4.096V full-scale output
• Integrated 10ppm/°C precision reference
• Automotive grade operating temperature range (–40°C to 125°C)
• Rail-to-rail output buffers with guaranteed monotonicity

Applications

• Process control and industrial automation
• Automatic test equipment
• Portable equipment
• Automotive systems

Procurement Notes

Verify the specific ordering suffix #PBF indicates lead-free design. Confirm package type MSOP matches the 16-lead requirement. Ensure supply voltage constraints (4.5V to 5.5V) align with system power rails. Check for availability status as distribution may vary.

Selection Notes

Select this part for applications requiring eight independent DAC channels with high accuracy. The H-grade ensures performance at elevated temperatures up to 125°C. The Z suffix configures power-on reset to zero-scale, suitable for safety-critical systems requiring safe startup states. Compare against L-grade variants if lower voltage operation (2.7V–5.5V) is needed.

Part Context

This component belongs to the LTC2636 family of octal DACs. Variants differ by resolution (8/10/12-bit), full-scale voltage (2.5V or 4.096V), temperature grade (C/I/H), and power-on reset behavior (MI/MX/Z). The MSOP package provides additional CLR and LDAC pins compared to the DFN variant.

Replacement Considerations

Direct pin-compatible replacements within the same family include LTC2636IMS-HZ12#PBF (Industrial grade, –40°C to 85°C) or LTC2636CDE-HZ12#PBF (Commercial grade, 0°C to 70°C). Verify temperature range requirements before substitution.

FAQ

What is the power-on reset state for the LTC2636HMS-HZ12?

In internal reference mode, the outputs reset to zero-scale upon power-up.

What is the maximum clock rate for the serial interface?

The SPI/MICROWIRE compatible 3-wire serial interface supports clock rates up to 50MHz.

Does the device support external references?

Yes, the REF pin can accept an external voltage to set the full-scale output, overriding the internal reference.