LTC2637IDE-HZ12#TRPBF

Overview

The LTC2637IDE-HZ12#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 error of ±2.5 LSB, a settling time of 5µs at ±1LSB, and ultralow DAC-to-DAC crosstalk below 3nV•s. It is housed in a 14-lead DFN package and includes double-buffered data latches.

Feature Summary

• Octal architecture with 12-bit resolution and rail-to-rail buffered outputs
• Integrated 4.096V precision reference with 10ppm/°C temperature coefficient
• I2C-compatible serial interface with selectable internal or external reference
• Power-on reset to zero-scale in internal reference mode

Applications

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

Procurement Notes

Verify the specific ordering suffix #TRPBF indicates tape and reel packaging containing 2500 pieces. Confirm the 'I' grade corresponds to the industrial temperature range of –40°C to 85°C. Ensure the 'H' suffix denotes the 4.096V full-scale output variant requiring a 4.5V to 5.5V supply voltage. Cross-reference the 'Z' power-on reset setting for zero-scale initialization upon power-up.

Selection Notes

Select this part when eight independent 12-bit voltage outputs are required within a compact footprint. The H-grade version is suitable for applications needing a 4.096V full-scale range powered by a 5V supply. The Z suffix ensures outputs initialize to zero volts after power-up, which is critical for safety in certain industrial or automotive contexts. Verify that the I2C bus speed requirements do not exceed 400kHz.

Part Context

This component belongs to the LTC2637 family of octal DACs, available in 12-, 10-, and 8-bit resolutions. The family shares identical pinouts and functional blocks, differing primarily in resolution, full-scale voltage options (L for 2.5V, H for 4.096V), and temperature grades (C, I, H). The DFN package offers a small 4mm × 3mm form factor with an exposed ground pad for thermal management.

Replacement Considerations

Publicly confirmed substitute part numbers are not provided in the source documentation. Designers should verify compatibility with other members of the LTC2637 family, such as the LTC2637IMS-HZ12#TRPBF, noting differences in package type (MSOP vs. DFN) while maintaining electrical equivalence.