LTC2636IMS-LMI8#PBF

Overview

The LTC2636IMS-LMI8#PBF is an octal, 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features a high-accuracy internal reference with a temperature coefficient of 10ppm/°C and a full-scale output of 2.5V. The device operates on a single supply ranging from 2.7V to 5.5V and utilizes a 3-wire SPI/MICROWIRE-compatible serial interface with clock rates up to 50MHz. It includes double-buffered data latches and power-on reset functionality that sets outputs to mid-scale in internal reference mode. The component is housed in a 16-lead MSOP package and supports industrial operating temperatures from –40°C to 85°C.

Feature Summary

• Octal 8-Bit Resolution: Provides eight independent DAC channels with guaranteed monotonicity over the full temperature range.
• Integrated Precision Reference: Features a 10ppm/°C internal reference setting a 2.5V full-scale output, or supports external references.
• High-Speed Serial Interface: Communicates via SPI/MICROWIRE at clock rates up to 50MHz with hardware clear and asynchronous update pins.
• Low Power Consumption: Draws typical supply current of 0.9mA at 3V with power-down modes reducing current to 20µA.

Applications

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

Procurement Notes

Verify the specific ordering suffix #PBF indicates lead-free design and tube packaging for the MSOP variant. Confirm the 'I' grade corresponds to the industrial temperature range of –40°C to 85°C. Ensure the 'MS' package designation matches the 16-lead MSOP form factor required for the application board layout.

Selection Notes

Select this part when eight low-cost, 8-bit DAC channels are required with integrated reference capabilities. Choose the L-grade variant for 2.7V to 5.5V supply operation if lower voltage systems are used. Consider the H-grade only if 4.5V to 5.5V supplies are available and a 4.096V full-scale output is needed. Verify pin compatibility between DFN and MSOP packages if swapping form factors.

Part Context

This component belongs to the LTC2636 family of octal DACs, which also offers 10-bit and 12-bit resolutions. Variants include the LTC2636DE series in 14-lead DFN packages and different power-on reset options such as zero-scale (Z) or mid-scale (MI/MX). The IMS-LMI8 designation specifically identifies the industrial grade, MSOP package, mid-scale reset, and 8-bit resolution configuration.

Replacement Considerations

Direct substitutes within the same family include other LTC2636 variants with different resolutions (LTC2636IMS-LMI10#PBF, LTC2636IMS-LMI12#PBF) or reset configurations (LTC2636IMS-LZ12#PBF). Cross-package equivalents like the LTC2636IDE-LMI8#TRPBF offer identical electrical performance in a 14-lead DFN format but require PCB footprint changes.