LTC2636CDE-LZ8#PBF

Overview

The LTC2636CDE-LZ8#PBF is an octal, 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features an integrated precision reference with a temperature coefficient of 10ppm/°C and a full-scale output of 2.5V. The device operates on a single 2.7V to 5.5V supply and utilizes a 3-wire SPI/MICROWIRE-compatible serial interface with clock rates up to 50MHz. It includes double-buffered data latches and guarantees monotonicity over the commercial temperature range of 0°C to 70°C. The part is housed in a 14-lead DFN package.

Feature Summary

• Octal configuration with 8 independent 8-bit DAC channels
• Integrated 10ppm/°C precision reference providing 2.5V full-scale output
• Rail-to-rail output buffers guaranteed monotonic over –40°C to 125°C
• Power-on reset to zero-scale in internal reference mode

Applications

• Mobile communications
• Process control and industrial automation
• Automatic test equipment
• Portable equipment
• Automotive systems
• Optical networking

Procurement Notes

Verify the specific ordering suffix #PBF indicates lead-free design compliance. Confirm the DE package designation corresponds to the 14-lead DFN form factor. Ensure the LZ suffix requirement for zero-scale power-on reset aligns with system initialization needs. Check that the C grade covers the required 0°C to 70°C operating environment.

Selection Notes

Select this component when eight low-cost, 8-bit voltage outputs are required with minimal external components. The LZ variant ensures outputs start at zero upon power-up, preventing transient errors in downstream circuits. Compare against LMI or LMX variants if mid-scale reset is preferred. Verify supply voltage compatibility within the 2.7V to 5.5V range for optimal performance.

Part Context

This part belongs to the LTC2636 family of octal DACs, which also offers 10-bit and 12-bit resolutions. Variants include the LTC2636-H series for 4.096V full-scale outputs requiring 4.5V to 5.5V supplies. Other packages like MSOP provide additional hardware control pins such as CLR and LDAC not present in the DFN version.

Replacement Considerations

Public confirmed substitute part numbers: None.