LTC2637IMS-HZ8#PBF

Overview

The LTC2637IMS-HZ8#PBF is an octal 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features an integrated precision 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 communicates via a 2-wire I2C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. It includes rail-to-rail output buffers, double-buffered data latches, and a power-on reset circuit configured to reset to zero-scale in internal reference mode. The component is housed in a 16-lead MSOP package.

Feature Summary

• Octal 8-bit resolution with rail-to-rail buffered outputs
• Integrated 4.096V precision reference (10ppm/°C)
• I2C interface with selectable slave addresses via CA0-CA2 pins
• Power-on reset to zero-scale in internal reference mode

Applications

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

Procurement Notes

Verify the specific ordering suffix HZ8 corresponds to the 16-lead MSOP package, Industrial temperature grade (-40°C to 85°C), 8-bit resolution, 4.096V full-scale output, and zero-scale power-on reset configuration as defined in the manufacturer's selection guide. Confirm RoHS compliance and lead-free status for procurement requirements.

Selection Notes

Select this part when eight independent 8-bit voltage outputs are required with high accuracy and low drift. Ensure the system supply voltage is within the 4.5V to 5.5V range required for the H-grade internal reference. Verify that the I2C bus speed supports up to 400kHz and that the zero-scale power-on reset behavior aligns with system startup requirements.

Part Context

This component belongs to the LTC2637 family of octal DACs, which also offers 10-bit and 12-bit resolutions. Variants exist with 2.5V full-scale outputs (LTC2637-L) or different power-on reset behaviors (Mid-Scale). The IMS designation indicates the Industrial temperature grade and MSOP package, distinguishing it from Commercial (C) or Automotive (H) grades and DFN packages.

Replacement Considerations

Direct functional equivalents within the same family include LTC2637IMS-HZ10#PBF (10-bit) and LTC2637IMS-HZ12#PBF (12-bit), provided higher resolution is acceptable. For different reset behaviors, consider LTC2637IMS-HMI8#PBF (Mid-Scale reset). Package and pinout remain consistent across these variants.