LTC2637HMS-LMI12#TRPBF

Overview

The LTC2637HMS-LMI12#TRPBF is an octal 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices Inc. It features an integrated precision reference with a full-scale output of 4.096V and operates on a single 4.5V to 5.5V supply. The device utilizes a 2-wire I2C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. Key electrical specifications include a maximum integral nonlinearity (INL) error of ±2.5 LSB, a settling time of 5µs at ±1/2 LSB, and ultralow DAC-to-DAC crosstalk below 3nV•s. It 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 12-bit resolution and rail-to-rail buffered outputs
• Integrated 4.096V precision reference with ±10ppm/°C temperature coefficient
• Ultralow crosstalk between channels (<3nV•s typical)
• Power-on reset to mid-scale in internal reference mode

Applications

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

Procurement Notes

Verify the specific ordering suffix #TRPBF indicates tape and reel packaging containing 2500 pieces. Confirm the H-grade designation ensures operation within the –40°C to 125°C automotive temperature range. Ensure the MS package corresponds to the 16-lead MSOP form factor required for the target PCB layout.

Selection Notes

Select this part when eight independent 12-bit voltage outputs are required with high channel isolation. The H-grade variant is necessary for applications exceeding 85°C. Verify that the 4.5V minimum supply voltage aligns with system power rails, as the L-grade supports lower voltages down to 2.7V.

Part Context

This component belongs to the LTC2637 family, which includes variants with different resolutions (8-, 10-, and 12-bit), full-scale voltages (2.5V or 4.096V), and temperature grades (C, I, and H). The MS suffix denotes the 16-lead MSOP package, while the H suffix specifies the extended temperature range suitable for automotive environments.

Replacement Considerations

Direct substitutes within the same family include LTC2637IMS-LMI12#TRPBF for industrial temperature range or LTC2637IDE-HMI12#TRPBF for DFN packaging. Cross-family replacements like the LTC2635 offer quad-channel configurations instead of octal.