LTC2636CDE-LZ10#PBF

Overview

The LTC2636CDE-LZ10#PBF is an octal, 10-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features an integrated precision reference with a full-scale output of 2.5V and a temperature coefficient of 10ppm/°C. The device operates on a single supply ranging from 2.7V to 5.5V and utilizes a 3-wire SPI/MICROWIRE-compatible serial interface with clock rates up to 50MHz. It includes rail-to-rail output buffers guaranteed monotonic over the operating range. This specific variant incorporates a power-on reset circuit that initializes all outputs to zero-scale upon power-up.

Feature Summary

• Octal architecture providing eight independent 10-bit DAC channels in a compact 14-lead DFN package.
• Integrated 2.5V full-scale reference with low drift of ±10ppm/°C for high accuracy applications.
• Power-on reset functionality ensures outputs initialize to zero-scale for consistent system startup.
• Ultralow crosstalk between DACs (<2.4nV•s) and double-buffered data latches for signal integrity.

Applications

• Process control and industrial automation systems requiring multi-channel signal generation.
• Portable equipment where low power consumption and small form factor are critical.
• Automatic test equipment needing precise, isolated analog voltage outputs.
• Mobile communications infrastructure utilizing multiple calibration or bias voltages.

Procurement Notes

Verify the ordering suffix #PBF confirms lead-free construction and RoHS compliance as per manufacturer standards. Confirm the DE package designation corresponds to the 14-lead plastic DFN footprint. Ensure the LZ suffix matches the required zero-scale power-on reset behavior for the target application design.

Selection Notes

Select this part when eight independent 10-bit channels are required with a fixed 2.5V internal reference. Choose the C grade for commercial temperature ranges (0°C to 70°C). Consider the H grade if a 4.096V full-scale output is needed, or the MI/MX variants if mid-scale initialization is preferred over zero-scale.

Part Context

This component belongs to the LTC2636 family of octal DACs, which also offers 8-bit and 12-bit resolutions. The family shares identical pinouts and interface protocols across resolution variants. The DE package distinguishes it from the MSOP option, offering a smaller thermal pad ground connection suitable for dense PCB layouts.

Replacement Considerations

Direct substitutes within the same family include LTC2636CDE-LZ8 (8-bit) and LTC2636CDE-LZ12 (12-bit), provided resolution differences are acceptable. Other LTC2636 variants with different reset behaviors (MI/MX) or reference voltages (H-grade) require software or hardware adjustments.