LTC2636CMS-LMI12#PBF

Overview

The LTC2636CMS-LMI12#PBF is an octal 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features an integrated high-accuracy reference with a temperature coefficient of 10ppm/°C, providing a full-scale output of 2.5V. The device operates on a single supply voltage ranging from 2.7V to 5.5V and utilizes a 3-wire SPI/MICROWIRE-compatible serial interface with clock rates up to 50MHz. Packaged in a 16-lead MSOP, it includes double-buffered data latches and power-on reset functionality that sets outputs to mid-scale upon initialization.

Feature Summary

• Octal 12-Bit Resolution: Provides eight independent 12-bit DAC channels with guaranteed monotonicity over the operating temperature range.
• Integrated Reference: Features an internal 10ppm/°C reference yielding a 2.5V full-scale output; supports external reference selection.
• Rail-to-Rail Output: Equipped with rail-to-rail output buffers capable of driving capacitive loads up to 500pF.
• Power-On Reset: Configured for mid-scale reset in internal reference mode upon power-up to ensure predictable system initialization.

Applications

• Mobile Communications
• Process Control and Industrial Automation
• Automatic Test Equipment

Procurement Notes

Verify the specific ordering suffix #PBF indicates lead-free design and tube packaging. Confirm the MS package designation corresponds to the 16-lead MSOP form factor. Ensure the CMS prefix aligns with the required commercial temperature grade (0°C to 70°C). Cross-reference the LMI12 code to confirm mid-scale reset behavior and 12-bit resolution specifications.

Selection Notes

Select this part when eight independent 12-bit channels are required within a compact footprint. The internal 2.5V reference simplifies design by eliminating external components, though an external reference can be used if different full-scale voltages are needed. The MSOP package provides hardware clear and LDAC pins not available in DFN variants. Verify supply voltage constraints, as the -L variant requires 2.7V to 5.5V.

Part Context

This component belongs to the LTC2636 family of octal DACs, which also includes 8-bit and 10-bit resolutions. Variants differ by package type (DFN or MSOP), temperature grade (C, I, H), and power-on reset behavior (Zero-Scale, Mid-Scale Internal, Mid-Scale External). The LTC2636CMS-LMI12#PBF specifically denotes the commercial grade, MSOP package, mid-scale internal reset, and 12-bit resolution configuration.

Replacement Considerations

Direct substitutes include other LTC2636 variants with matching resolution and package, such as LTC2636CMS-LMX12#PBF (external reference reset) or LTC2636CMS-LZ12#PBF (zero-scale reset). For pin-compatible alternatives with different reset behaviors, verify register configurations and power-on states carefully.