LTC2636CDE-LMX8#PBF

Overview

The LTC2636CDE-LMX8#PBF is an octal 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features a 14-lead DFN package and operates on a single supply of 2.7V to 5.5V. The device includes double-buffered data latches and communicates via a 3-wire SPI/MICROWIRE-compatible interface with clock rates up to 50MHz. It utilizes an external reference input, resetting to mid-scale upon power-up in this mode. Key electrical parameters include a settling time of 3.4µs, a maximum integral nonlinearity (INL) of ±0.5 LSB, and a typical supply current of 0.9mA at 3V.

Feature Summary

• Octal architecture with 8 independent 8-bit DAC channels
• SPI/MICROWIRE compatible 3-wire serial interface supporting up to 50MHz clock
• Double-buffered data latches for glitch-free updates
• Power-on reset configured to mid-scale when using external reference

Applications

• Mobile communications systems
• Process control and industrial automation
• Automatic test equipment
• Portable battery-powered equipment
• Optical networking devices

Procurement Notes

Verify the specific suffix #PBF indicates lead-free construction and standard tube packaging. Confirm the DE package designation corresponds to the 14-lead DFN form factor. Ensure the LMX8 variant matches the required external reference operation and mid-scale power-on reset behavior for the target application design.

Selection Notes

Select this part for applications requiring multiple low-resolution outputs with minimal crosstalk. The LMX8 suffix specifies external reference usage and mid-scale initialization. Compare against LZ8 or LMI8 variants if zero-scale or internal reference mid-scale resets are preferred instead. Verify that the 8-bit resolution meets the system accuracy requirements.

Part Context

This component belongs to the LTC2636 family of octal DACs available in 12-, 10-, and 8-bit resolutions. The C grade denotes commercial temperature range operation (0°C to 70°C). The DE suffix identifies the 14-lead plastic DFN package. Other family members include the I-grade industrial version and H-grade automotive version with wider temperature ranges.

Replacement Considerations

Public confirmed substitute part numbers: None identified in verified documentation.