LTC2636CDE-HZ8#PBF

Overview

The LTC2636CDE-HZ8#PBF is an octal 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features an integrated high-accuracy reference with a full-scale output of 4.096V and operates on a single 4.5V to 5.5V supply. The device includes rail-to-rail output buffers, guaranteed monotonicity over the temperature range, and double-buffered data latches. Communication is handled via a 3-wire SPI/MICROWIRE-compatible interface supporting clock rates up to 50MHz. Power-on reset defaults to zero-scale in internal reference mode.

Feature Summary

• Octal 8-Bit Resolution: Eight independent DAC channels with 8-bit resolution.
• Integrated Reference: Internal 10ppm/°C reference providing 4.096V full-scale output.
• Rail-to-Rail Output: Rail-to-rail output buffers ensure maximum dynamic range.
• SPI Interface: 3-wire serial interface compatible with standard SPI protocols.

Applications

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

Procurement Notes

Verify the package type is 14-lead DFN and confirm the operating temperature range is commercial (0°C to 70°C). Ensure the power supply voltage is within the 4.5V to 5.5V range required for the H-grade variant.

Selection Notes

Select this part when eight independent 8-bit DACs are needed with a 4.096V full-scale range. The H suffix indicates the 4.096V internal reference option, while Z indicates power-on reset to zero-scale. Verify compatibility with the system's SPI clock speed and voltage levels.

Part Context

This component belongs to the LTC2636 family of octal DACs. Variants differ by resolution (8, 10, or 12 bits), reference voltage (L for 2.5V, H for 4.096V), and power-on reset behavior (MI/MX for mid-scale, Z for zero-scale). The DE suffix denotes the 14-lead DFN package.

Replacement Considerations

Direct replacements include other LTC2636 variants with matching resolution and reference voltage, such as LTC2636CDE-HZ10#PBF or LTC2636CDE-HZ12#PBF, provided pin compatibility and performance requirements are met.

FAQ

What is the power-on reset state for the LTC2636CDE-HZ8?

The 'Z' suffix indicates that the DAC outputs reset to zero-scale upon power-up when using the internal reference mode.

What is the minimum supply voltage for this device?

The LTC2636-H series requires a supply voltage between 4.5V and 5.5V for specified performance.

Does the device support external references?

Yes, the REF pin can be used as an input to set the full-scale output voltage to the external reference voltage.