LTC2636HDE-LMI8#PBF

Overview

The LTC2636HDE-LMI8#PBF is an octal, 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features an integrated 10ppm/°C reference providing a 4.096V full-scale output and operates on a single 4.5V to 5.5V supply. The device includes rail-to-rail output buffers and guarantees monotonicity over the –40°C to 125°C automotive temperature range. Communication occurs via a 3-wire SPI/MICROWIRE-compatible interface with clock rates up to 50MHz. Power-on reset defaults to mid-scale in internal reference mode. It is housed in a 14-lead 4mm × 3mm DFN package.

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: Internal 10ppm/°C reference sets a 4.096V full-scale output; supports external reference input.
• Automotive Grade Reliability: Guaranteed monotonic operation across the –40°C to 125°C temperature range.
• Fast Serial Interface: Compatible with standard SPI and MICROWIRE protocols, supporting clock frequencies up to 50MHz.

Applications

• Automotive systems requiring high channel count and wide temperature tolerance
• Process control and industrial automation equipment
• Portable battery-powered instrumentation
• Optical networking signal generation

Procurement Notes

Verify the specific suffix #PBF indicates lead-free packaging compliant with RoHS standards. Confirm the DE package designation corresponds to the 14-lead DFN form factor. Ensure the H grade matches the required 4.5V to 5.5V supply voltage range for your application design.

Selection Notes

Select this part when eight isolated analog outputs are needed within strict space constraints. The H suffix mandates a minimum 4.5V supply, distinguishing it from the L-grade 2.7V variants. The MI suffix ensures a mid-scale power-on state, which may be necessary to prevent transient errors in downstream circuitry during system initialization.

Part Context

This component belongs to the LTC2636 family of octal DACs, which also offers 10-bit and 12-bit resolutions. Variants include the LTC2636LDE for lower voltage applications and the LTC2636IDE for industrial temperatures. The HDE-LMI8 configuration specifically targets automotive environments requiring 4.096V spans and mid-scale reset behavior.

Replacement Considerations

Direct pin-compatible substitutes within the same family include the LTC2636HDE-LMX8#PBF (external reference reset) or LTC2636HDE-LZ8#PBF (zero-scale reset). For different resolution needs, consider the LTC2636HDE-LMI10#PBF or LTC2636HDE-LMI12#PBF.