LTC2636HDE-LZ12#PBF

Overview

The LTC2636HDE-LZ12#PBF is an octal 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features an integrated precision reference with a full-scale output of 4.096V and a temperature coefficient of 10ppm/°C. The device operates on a single 4.5V to 5.5V supply and includes rail-to-rail output buffers. It communicates via a 3-wire SPI/MICROWIRE-compatible interface with clock rates up to 50MHz. The part is housed in a 14-lead DFN package and guarantees monotonicity over the automotive temperature range of –40°C to 125°C.

Feature Summary

• Octal 12-bit resolution with maximum integral nonlinearity error of ±2.5LSB
• Integrated 4.096V full-scale reference with 10ppm/°C drift
• Automotive grade operation from –40°C to 125°C
• Power-on reset to zero-scale for consistent initialization

Applications

• Process control and industrial automation
• Automatic test equipment
• Portable equipment
• Automotive systems

Procurement Notes

Verify the specific suffix #PBF indicates lead-free compliance and standard tube packaging for the DE package variant. Confirm the H-grade designation matches the required 4.5V to 5.5V supply range and 125°C operating temperature. Ensure the LZ12 configuration aligns with the zero-scale power-on reset requirement for the target application.

Selection Notes

Select this component when eight independent 12-bit channels are required in a compact footprint. The H-grade version is necessary for applications requiring a 4.096V internal reference span, which mandates a minimum supply voltage of 4.5V. The LZ12 suffix ensures the outputs initialize to zero upon power-up, preventing transient errors in downstream circuits during system startup.

Part Context

This part belongs to the LTC2636 family of octal DACs available in various resolutions and packages. The DE suffix denotes the 14-lead 4mm × 3mm plastic DFN package. The H temperature grade distinguishes it from commercial (C) and industrial (I) variants by supporting extended high-temperature operation up to 125°C.

Replacement Considerations

Direct pin-compatible replacements within the same package include other LTC2636 variants with different resolutions or reset configurations. For single-channel requirements, consider the LTC2640. For I2C interfaces, the LTC2637 offers similar performance characteristics.