LTC2636HDE-LMI12#PBF

Overview

The LTC2636HDE-LMI12#PBF is an octal 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features an integrated 4.096V full-scale reference with a 10ppm/°C temperature coefficient. The device operates on a single 4.5V to 5.5V supply and includes rail-to-rail output buffers guaranteed monotonic over the –40°C to 125°C automotive temperature range. Communication is handled via a 50MHz SPI/MICROWIRE-compatible 3-wire serial interface. Power-on reset defaults to mid-scale in internal reference mode.

Feature Summary

• Octal 12-Bit Resolution: Provides eight independent 12-bit DAC channels with ±2.5 LSB maximum integral nonlinearity (INL).
• Integrated High-Accuracy Reference: Includes a 4.096V full-scale internal reference with low drift of 10ppm/°C.
• Automotive Temperature Grade: Operates reliably from –40°C to 125°C, suitable for harsh environments.
• Low Power Consumption: Draws 1.1mA at 5V with internal reference; power-down current is 30µA.

Applications

• Automotive systems requiring high channel count and reliability.
• Process control and industrial automation equipment.
• Automatic test equipment (ATE).
• Portable battery-powered instrumentation.

Procurement Notes

Verify the specific suffix #PBF indicates lead-free tube packaging. Confirm the H-grade designation matches the required 4.5V–5.5V supply range and 4.096V output span. Ensure the DE package (14-lead DFN) fits the PCB footprint constraints. Check for availability of development kits like DC1466A series if hardware evaluation is needed.

Selection Notes

Select this part when eight channels are required with 12-bit precision and automotive temperature tolerance. Choose the H-grade variant specifically for 4.096V full-scale outputs; the L-grade is limited to 2.5V. The MI suffix ensures mid-scale power-up, which may be necessary to prevent downstream circuit errors during initialization compared to zero-scale options.

Part Context

This component belongs to the LTC2636 family of octal DACs. Variants differ by resolution (8/10/12-bit), temperature grade (C/I/H), and power-on reset behavior (Z/MI/MX). The HDE-LMI12 configuration combines the highest accuracy (12-bit), automotive grade (H), DFN package (DE), and mid-scale reset (MI) with the higher voltage internal reference (H).

Replacement Considerations

Direct pin-compatible replacements within the same family include LTC2636IDE-LMI12#PBF (Industrial grade, –40°C to 85°C) or LTC2636CDE-LMI12#PBF (Commercial grade, 0°C to 70°C). For lower resolution needs, LTC2636HDE-LMX10#PBF offers 10-bit performance. External reference designs may use LTC2636HDE-HMX12#PBF.