LTC2637IDE-HMI8#TRPBF

Overview

The LTC2637IDE-HMI8#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 temperature coefficient of 10ppm/°C, providing a full-scale output of 4.096V. The device operates on a single supply voltage ranging from 4.5V to 5.5V and includes rail-to-rail output buffers guaranteed monotonic over the industrial temperature range of –40°C to 85°C. Communication is handled via a 2-wire I2C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. The part incorporates double-buffered data latches and a power-on reset circuit configured to initialize outputs to mid-scale in internal reference mode.

Feature Summary

• Octal architecture with 8 independent 8-bit DAC channels
• Integrated 4.096V precision reference with ±10ppm/°C drift
• Rail-to-rail output buffers with ultralow crosstalk (<3nV•s)
• I2C interface with selectable slave addresses via CA0–CA2 pins

Applications

• Mobile communications systems
• Process control and industrial automation
• Automatic test equipment
• Portable battery-powered equipment
• Automotive electronics
• Optical networking devices

Procurement Notes

Verify that the ordering suffix #TRPBF confirms the tape and reel packaging format containing 2500 pieces per reel. Confirm the 'I' grade designation matches the required industrial operating temperature range of –40°C to 85°C for the specific application environment.

Selection Notes

Select this part when eight isolated voltage outputs are required within a compact footprint. The H-grade variant is necessary for applications demanding a 4.096V full-scale range, requiring a minimum supply voltage of 4.5V. Ensure the system design accommodates the 4.5V to 5.5V VCC requirement, as lower voltages will not support the specified performance levels.

Part Context

This component belongs to the LTC2637 family, which offers 8-bit, 10-bit, and 12-bit resolution options. The MSOP package variant provides 16 leads compared to the 14-lead DFN version, adding dedicated pins for chip address configuration (CA1, CA2). The 'H' suffix indicates the 4.096V internal reference specification, distinguishing it from the 2.5V 'L' grade parts.

Replacement Considerations

Direct substitutes include other members of the LTC2637 family such as the LTC2637IMS-HZ8#TRPBF or LTC2637IMS-HMX8#TRPBF, depending on the desired power-on reset behavior. Verify pin compatibility between the 16-lead MSOP packages before substitution.