LTC2637IDE-HZ12#PBF

Overview

The LTC2637IDE-HZ12#PBF is an octal 12-bit voltage-output digital-to-analog converter featuring an integrated precision reference with a 10ppm/°C temperature coefficient. It provides a full-scale output of 4.096V and operates from a single 4.5V to 5.5V supply. The device includes rail-to-rail output buffers, double-buffered data latches, and a power-on reset circuit configured to zero-scale in internal reference mode. Communication is handled via a 2-wire I2C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes.

Feature Summary

• Octal 12-bit resolution with maximum INL error of ±2.5LSB
• Integrated 4.096V full-scale reference with ±10ppm/°C drift
• Rail-to-rail output buffers guaranteed monotonic over –40°C to 125°C
• Ultralow DAC-to-DAC crosstalk (<3nV•s) and low noise (0.75mVP-P)

Applications

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

Procurement Notes

Verify the specific ordering suffix 'HZ12' corresponds to the Industrial temperature grade, Zero-Scale power-on reset, and 12-bit resolution configuration. Confirm the package type matches the required PCB footprint, as this part number indicates a specific pinout variant within the LTC2637 family. Ensure supply voltage constraints are met for the H-grade specification.

Selection Notes

Select this component when eight independent 12-bit channels are required with high accuracy and low crosstalk. The H-grade designation supports a wider operating temperature range up to 125°C compared to C or I grades. Choose the Z suffix if a zero-scale reset state is preferred upon power-up in internal reference mode, rather than mid-scale.

Part Context

This part belongs to the LTC2637 family of octal DACs available in 12-, 10-, and 8-bit resolutions. The 'H' suffix denotes the Automotive temperature grade (-40°C to 125°C), while 'Z' specifies the power-on reset behavior. The 'IDE' indicates the Industrial temperature grade (-40°C to 85°C) and MSOP package, creating a specific combination of thermal and packaging attributes within the product line.

Replacement Considerations

Direct substitutes include other LTC2637 variants with matching resolution and package, such as LTC2637IMS-HZ12#PBF or LTC2637CMS-HZ12#PBF, depending on the required temperature grade. Cross-model replacements like the LTC2638 may be considered if fewer channels are acceptable.