LTC2636HMS-LZ8#PBF

Overview

The LTC2636HMS-LZ8#PBF is an octal 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features an integrated 4.096V full-scale reference with a temperature coefficient of 10ppm/°C, operating within a 4.5V to 5.5V supply range. The device utilizes a 3-wire SPI/MICROWIRE-compatible interface with clock rates up to 50MHz. Key electrical characteristics include a settling time of 3.8µs at ±1LSB for 8-bit resolution and ultralow DAC-to-DAC crosstalk of less than 2.4nV•s. It incorporates double-buffered data latches and a power-on reset circuit that clears outputs to zero-scale upon initialization.

Feature Summary

• Octal 8-Bit Architecture: Eight independent DAC channels in a single package.
• Integrated Reference: Internal 4.096V reference with ±10ppm/°C drift.
• Zero-Scale Power-On Reset: Outputs initialize to zero-scale for consistent system startup.
• High-Speed Interface: 3-wire serial communication supporting up to 50MHz SCK frequency.

Applications

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

Procurement Notes

Verify the specific suffix 'LZ8' corresponds to the 8-bit resolution and zero-scale power-on reset configuration. Confirm the 'MS' designation indicates the 16-lead MSOP package type. Ensure the '#PBF' suffix aligns with lead-free manufacturing requirements for the target assembly process.

Selection Notes

Select this component when eight low-resolution channels are required with a fixed 4.096V output span. The H-grade ensures operation across the –40°C to 125°C automotive temperature range. Consider the external reference mode if a different full-scale voltage is needed, as the internal reference is fixed at 4.096V for this variant.

Part Context

This part belongs to the LTC2636 family of octal DACs, which also includes 10-bit and 12-bit variants. The 'H' grade distinguishes it from commercial (C) and industrial (I) grades by offering extended temperature capability. The 'LZ' coding specifies the zero-scale reset behavior, differentiating it from mid-scale reset options like 'MI' or 'MX'.

Replacement Considerations

Direct pin-compatible substitutes within the same family include LTC2636HMS-LZ10#PBF (10-bit) and LTC2636HMS-LZ12#PBF (12-bit). These share identical pinouts and interfaces but offer higher resolution. For external reference applications, LTC2636HMX variants provide mid-scale reset instead of zero-scale.