LTC2636CMS-HZ8#TRPBF

Overview

The LTC2636CMS-HZ8#TRPBF is an octal, 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features an integrated internal reference with a temperature coefficient of 10ppm/°C and a full-scale output of 4.096V. The device operates on a single 4.5V 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, ultralow crosstalk between DACs (<2.4nV•s), and guaranteed monotonicity over the operating temperature range. The part is housed in a 16-lead MSOP package.

Feature Summary

• Octal 8-Bit Resolution: Provides eight independent 8-bit DAC channels with rail-to-rail output buffers.
• Integrated Reference: Features a high-accuracy internal reference with 10ppm/°C drift, setting full-scale output to 4.096V.
• Power-On Reset: Configured for 'HZ' suffix to reset outputs to zero-scale upon power-up in internal reference mode.
• Low Power Consumption: Draws typical supply current of 1.1mA at 5V with internal reference enabled.

Applications

• Mobile Communications
• Process Control and Industrial Automation
• Automatic Test Equipment
• Portable Equipment
• Automotive Systems

Procurement Notes

Verify the specific ordering suffix HZ8#TRPBF against official Analog Devices documentation to confirm the 16-lead MSOP package, 8-bit resolution, zero-scale power-on reset behavior, and tape-and-reel packaging quantity. Ensure compatibility with 4.5V to 5.5V supply requirements for the H-grade variant.

Selection Notes

Select this component when eight independent voltage outputs are required with moderate precision (8-bit). The HZ suffix indicates a zero-scale power-on reset, suitable for systems requiring safe initialization. Verify that the 4.5V minimum supply voltage aligns with system power rails, as the L-grade variant supports lower voltages down to 2.7V.

Part Context

This part belongs to the LTC2636 family of octal DACs available in 12-, 10-, and 8-bit resolutions. Variants differ by full-scale voltage (L-grade: 2.5V, H-grade: 4.096V), power-on reset behavior (MI/MX for mid-scale, Z for zero-scale), and package type (DFN or MSOP). The CMS designation indicates the commercial temperature grade (0°C to 70°C) and MSOP package.

Replacement Considerations

Direct substitutes within the same family include LTC2636CMS-LZ8#TRPBF (2.5V FS, 2.7V-5.5V supply) or LTC2636CMS-MI8#TRPBF (mid-scale reset). Cross-family replacements like LTC2637 offer I2C interfaces but require pinout and software adaptation.

FAQ

What is the power-on reset state for the LTC2636CMS-HZ8?

The 'HZ' suffix indicates that the DAC outputs reset to zero-scale when power is applied, provided the internal reference mode is selected.

What is the maximum serial clock frequency?

The SPI/Microwire compatible serial interface supports clock rates up to 50MHz.

Does the device support external references?

Yes, the REF pin can be used as an input for an external reference voltage, which sets the full-scale output. In this mode, the power-on reset defaults to mid-scale unless configured otherwise.