LTC2636CDE-LMX8#TRPBF

Overview

The LTC2636CDE-LMX8#TRPBF 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 an integrated 10ppm/°C reference with a full-scale output of 2.5V. It utilizes a 3-wire SPI/MICROWIRE-compatible interface with clock rates up to 50MHz. Power-on reset defaults to mid-scale in external reference mode. Key electrical parameters include a settling time of 3.4µs, ±0.5 LSB differential nonlinearity, and a supply current of 0.9mA at 3V.

Feature Summary

• Octal 8-Bit Architecture: Eight independent DAC channels with rail-to-rail output buffers in a compact 14-lead DFN package.
• Integrated Precision Reference: Includes a 10ppm/°C internal reference providing a 2.5V full-scale output range.
• High-Speed Interface: Communicates via a 3-wire serial interface supporting clock frequencies up to 50MHz.
• Power-On Reset Configuration: Resets outputs to mid-scale upon power-up when operating in external reference mode.

Applications

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

Procurement Notes

Verify the specific ordering suffix #TRPBF indicates tape and reel packaging containing 2500 pieces. Confirm the DE package designation corresponds to the 14-lead DFN form factor. Ensure the LM suffix requirement for external reference mid-scale reset aligns with system initialization needs before procurement.

Selection Notes

Select this part for applications requiring eight low-cost, 8-bit voltage outputs with moderate accuracy. The L suffix denotes a 2.5V full-scale range suitable for 2.7V to 5.5V single-supply systems. Choose between internal or external reference modes based on drift requirements; this specific suffix configures mid-scale reset for external reference usage.

Part Context

This component belongs to the LTC2636 family of octal DACs, which also offers 10-bit and 12-bit resolutions. Variants exist with different temperature grades (C, I, H) and package types (DFN, MSOP). The CDE-LMX8 configuration specifically targets commercial temperature ranges with 8-bit resolution and external reference reset behavior.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify pin compatibility and electrical specifications against alternative octal DACs if sourcing constraints require substitution.

FAQ

What is the default output state after power-up?

For the LTC2636-LMX variant, the outputs reset to mid-scale when power is applied in external reference mode.

What is the maximum serial clock frequency?

The 3-wire SPI/MICROWIRE compatible interface supports clock rates up to 50MHz.

How does the internal reference affect the output span?

In internal reference mode, the LTC2636-L provides a fixed full-scale output span of 2.5V determined by the integrated 1.25V reference multiplied by two.