LTC2636HMS-LMI12#PBF

Overview

The LTC2636HMS-LMI12#PBF is an octal 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices, housed in a 16-lead MSOP package. It features an integrated precision reference providing a 4.096V full-scale output and operates on a single 4.5V to 5.5V supply. The device includes rail-to-rail output buffers, double-buffered data latches, and an SPI/MICROWIRE-compatible 3-wire serial interface with clock rates up to 50MHz. It guarantees monotonicity over the –40°C to 125°C temperature range and incorporates a power-on reset circuit that sets outputs to mid-scale upon initialization.

Feature Summary

• Octal 12-Bit Resolution: Provides eight independent 12-bit DAC channels with maximum integral nonlinearity (INL) error of ±2.5 LSB.
• Integrated Precision Reference: Features an internal 10ppm/°C reference yielding a 4.096V full-scale output for H-grade parts.
• Rail-to-Rail Output Buffers: Ensures wide dynamic range operation with low output impedance and short-circuit protection.
• Power-On Reset to Mid-Scale: Automatically initializes all DAC outputs to mid-scale (2.048V) upon power-up in internal reference mode.

Applications

• Process Control and Industrial Automation
• Automatic Test Equipment
• Portable Equipment

Procurement Notes

Verify the specific suffix 'HMS' confirms the Automotive temperature grade (-40°C to 125°C), 16-lead MSOP package, and 12-bit resolution. Confirm the 'LMI' sub-suffix indicates the Power-On Reset behavior is set to Mid-Scale in Internal Reference mode. Ensure the '#PBF' designation matches lead-free RoHS compliance requirements for the target assembly process.

Selection Notes

Select this part when eight independent 12-bit channels are required with high accuracy and automotive temperature stability. The H-grade variant necessitates a supply voltage between 4.5V and 5.5V due to its 4.096V internal reference. Choose this over L-grade variants if the application requires higher output swing and operates within the specified higher voltage range. Verify that the MSOP package footprint fits the PCB design constraints.

Part Context

This component belongs to the LTC2636 family of octal DACs, which also offers 10-bit and 8-bit resolutions, as well as DFN packaging options. The 'H' designation distinguishes it from commercial (C) and industrial (I) grades by extending the operating temperature range to 125°C. The 'M' indicates the MSOP package, while 'S' denotes the specific pinout and feature set including CLR and LDAC pins available in this package type.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the source material. For equivalent functionality, consider other members of the LTC2636 family such as LTC2636HMS-LMX12#PBF (External Reference Mode) or LTC2636HMS-HZ12#PBF (Zero-Scale Reset), ensuring package and electrical specifications match.