LTC2637IDE-HZ8#TRPBF

Overview

The LTC2637IDE-HZ8#TRPBF is an octal 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features a high-accuracy internal 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 guaranteed monotonic over the –40°C to 125°C automotive temperature range. Communication is handled via a 2-wire I2C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. It incorporates double-buffered data latches, power-on reset to zero-scale in internal reference mode, and ultralow DAC-to-DAC crosstalk.

Feature Summary

• Octal 8-Bit Resolution: Provides eight independent 8-bit DAC channels with ±0.5 LSB maximum INL error.
• Integrated Precision Reference: Includes a 4.096V full-scale internal reference with ±10ppm/°C drift.
• Automotive Grade: Guaranteed monotonic operation across the –40°C to 125°C temperature range.
• Low Power Consumption: Draws 1mA typical supply current at 5V; supports power-down mode with 30µA max current.

Applications

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

Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging containing 2500 pieces. Confirm the 'I' grade corresponds to the industrial temperature range if extended range beyond automotive is not required, though this part is rated for H-grade automotive conditions. Ensure the DFN package type matches the PCB footprint requirements.

Selection Notes

Select this component when multiple low-cost, low-resolution voltage outputs are needed in a compact form factor. The H-grade designation ensures suitability for harsh environments up to 125°C. Use external reference mode by connecting a voltage to the REF pin if a different full-scale output than 4.096V is desired.

Part Context

This part belongs to the LTC2637 family, which offers 12-, 10-, and 8-bit resolutions in both 14-lead DFN and 16-lead MSOP packages. The 'H' suffix denotes the 4.096V full-scale version requiring a 4.5V–5.5V supply, while 'Z' indicates power-on reset to zero-scale. The 'IDE' prefix specifies the Industrial temperature grade and DFN package.

Replacement Considerations

Direct substitutes within the same family include LTC2637IMS-HZ8#TRPBF (MSOP package) or variants with different resolutions like LTC2637IDE-HZ10#TRPBF (10-bit). Verify pin compatibility and thermal resistance differences between DFN and MSOP packages when swapping.