LTC2637CMS-HMI8#TRPBF

Overview

The LTC2637CMS-HMI8#TRPBF is an octal 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features a rail-to-rail output buffer and a power-on reset to mid-scale in internal reference mode. The device operates on a single 2.7V to 5.5V supply with a maximum integral nonlinearity of ±0.5 LSB. It communicates via a 2-wire I2C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. The component is housed in a 16-lead MSOP package.

Feature Summary

• Octal 8-Bit Resolution: Provides eight independent DAC channels with guaranteed monotonicity over the operating temperature range.
• Integrated Precision Reference: Includes a 10ppm/°C reference for a 2.5V full-scale output, or supports external references.
• Low Power Consumption: Draws approximately 100µA per DAC at 3V supply voltage.
• Ultralow Crosstalk: Features less than 3nV•s crosstalk between DAC channels.

Applications

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

Procurement Notes

Verify the specific ordering suffix #TRPBF confirms the tape and reel packaging format containing 2500 pieces. Confirm the 'MS' designation matches the required 16-lead MSOP package type for the target PCB layout. Ensure the 'HMI8' configuration aligns with the need for mid-scale power-on reset behavior in internal reference mode.

Selection Notes

Select this part when eight low-cost, 8-bit voltage outputs are required within a compact footprint. The 2.7V to 5.5V supply range suits battery-powered applications. Verify that the ±0.5 LSB INL specification meets system accuracy requirements. Consider the 100µA per DAC current consumption for total power budget calculations in portable designs.

Part Context

This component belongs to the LTC2637 family, which offers 12-, 10-, and 8-bit resolutions. The CMS variant specifically denotes the commercial temperature grade (0°C to 70°C) and the MSOP package. Other variants include the H-grade for automotive temperatures (-40°C to 125°C) and DE packages for DFN form factors.

Replacement Considerations

Direct substitutes within the same family include LTC2637IMS-HMI8#TRPBF for industrial temperature range or LTC2637CMS-HZ8#TRPBF if zero-scale power-on reset is preferred. Cross-package equivalents like LTC2637CDE-LMI8#TRPBF require pinout adaptation due to the DFN package difference.

FAQ

What is the default output state upon power-up?

The LTC2637CMS-HMI8#TRPBF is configured to reset to mid-scale when using the internal reference mode after power-up.

How does the device handle DAC-to-DAC interference?

The device incorporates ultralow crosstalk between DACs, specified as less than 3nV•s, ensuring minimal signal coupling between adjacent channels during switching.

What is the maximum clock frequency supported?

The I2C-compatible serial interface supports both standard mode at 100kHz and fast mode at 400kHz clock rates.