LTC2636IDE-LMX8#TRPBF

Overview

The LTC2636IDE-LMX8#TRPBF is an octal 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features a 10ppm/°C integrated reference and operates on a single 2.7V to 5.5V supply. The device utilizes a 3-wire SPI/MICROWIRE-compatible interface with clock rates up to 50MHz. It includes double-buffered data latches, power-on reset to mid-scale in external reference mode, and rail-to-rail output buffers guaranteed monotonic over the temperature range. The part is housed in a 14-lead DFN package.

Feature Summary

• Octal 8-Bit Resolution: Provides eight independent DAC channels with 8-bit resolution.
• Integrated Reference: Features a high-accuracy 10ppm/°C internal reference for stable operation.
• SPI Interface: Communicates via a 3-wire serial interface supporting clock rates up to 50MHz.
• Power-On Reset: Resets outputs to mid-scale in external reference mode upon power-up.

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 IDE suffix aligns with the required industrial temperature grade (-40°C to 85°C) and LMX configuration for external reference mid-scale reset.

Selection Notes

Select this component when eight independent 8-bit voltage outputs are required within a compact footprint. The LMX variant is appropriate for systems requiring mid-scale initialization during external reference operation. Verify that the 2.7V to 5.5V supply range meets system power constraints and that the 50MHz SPI speed is compatible with the host controller.

Part Context

This part belongs to the LTC2636 family of octal DACs, which offers various resolutions (8, 10, 12-bit) and full-scale voltages (2.5V or 4.096V). The 'I' denotes the industrial temperature grade, while 'DE' specifies the 14-lead DFN package. The 'LMX' code indicates mid-scale reset behavior in external reference mode.

Replacement Considerations

Direct replacements within the same family include LTC2636IDE-LMI8#TRPBF (internal reference mid-scale reset) or LTC2636IDE-LZ8#TRPBF (zero-scale reset). For different resolutions, consider LTC2636IDE-LMX10#TRPBF or LTC2636IDE-LMX12#TRPBF, ensuring pin compatibility and performance requirements are met.

FAQ

What is the power-on reset behavior for the LTC2636IDE-LMX8?

In external reference mode, the LTC2636IDE-LMX8 resets all DAC outputs to mid-scale upon power-up.

What is the maximum serial clock frequency?

The device supports a serial clock (SCK) frequency of up to 50MHz.

Is the output buffer rail-to-rail?

Yes, the LTC2636 incorporates rail-to-rail output buffers for all eight channels.