LTC2637HDE-HMI12#PBF

Overview

The LTC2637HDE-HMI12#PBF is an octal 12-bit voltage-output digital-to-analog converter from Analog Devices. It features an integrated precision reference providing a 4.096V full-scale output and operates on a 4.5V to 5.5V supply. The device communicates via 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 ±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.

Feature Summary

• Octal architecture with 12-bit resolution and rail-to-rail buffered outputs
• Integrated 4.096V reference with 10ppm/°C temperature coefficient
• I2C interface with selectable internal or external reference input
• 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 HDE against official documentation to confirm package type and lead finish. Confirm that the H-grade designation aligns with the required -40°C to 125°C automotive operating range for the target application environment.

Selection Notes

Select this part when eight independent 12-bit channels are required within a compact footprint. The H-grade variant is necessary for high-temperature environments up to 125°C. Ensure the system supply voltage remains between 4.5V and 5.5V to support the 4.096V internal reference configuration.

Part Context

This component belongs to the LTC2637 family of octal DACs available in 14-lead DFN and 16-lead MSOP packages. The HDE suffix indicates the H-temperature grade, DE package type (14-lead DFN), and HMI12 resolution/reset configuration. Other variants exist with different resolutions (8-bit, 10-bit) and reset behaviors.

Replacement Considerations

Direct pin-compatible substitutes within the same family include other LTC2637 variants with matching channel counts and resolutions, such as LTC2637HDE-HZ12#PBF or LTC2637HDE-LMI12#PBF, provided the power-on reset behavior and reference voltage requirements are compatible.