LTC2637HDE-HZ12#PBF

Overview

The LTC2637HDE-HZ12#PBF is an octal 12-bit voltage-output DAC from Analog Devices, featuring an integrated precision reference with a full-scale output of 4.096V and a temperature coefficient of 10ppm/°C. It 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. The device includes rail-to-rail output buffers guaranteed monotonic over the –40°C to 125°C automotive temperature range. Key electrical specifications include a maximum INL error of ±2.5LSB, low noise of 0.75mVP-P (0.1Hz to 200kHz), and ultralow crosstalk between channels (<3nV•s).

Feature Summary

• Octal 12-bit resolution with integrated 4.096V, 10ppm/°C reference.
• Automotive grade operating temperature range: –40°C to 125°C.
• Rail-to-rail output buffers with guaranteed monotonicity.
• I2C interface with selectable power-on reset to zero-scale or mid-scale.

Applications

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

Procurement Notes

Verify the specific ordering suffix HZ12#PBF against official documentation to confirm the package type (14-lead DFN), temperature grade (Automotive), and power-on reset behavior (Zero-Scale in Internal Reference Mode). Ensure compatibility with system voltage requirements (4.5V to 5.5V) and I2C bus timing constraints before procurement.

Selection Notes

Select this part for applications requiring high channel count (8 channels) with precise voltage outputs in automotive environments. Compare against LTC2637L variants if lower supply voltages (2.7V–5.5V) or different full-scale outputs (2.5V) are needed. Consider the MSOP package option if DFN soldering constraints exist, noting that thermal resistance limits output current in MSOP packages.

Part Context

This component belongs to the LTC2637 family of octal DACs, which also includes 10-bit and 8-bit resolutions. Variants differ by full-scale voltage (LTC2637-L for 2.5V, LTC2637-H for 4.096V), temperature grade (C, I, H), and power-on reset configuration (Z, MI, MX). The H-grade designation specifically indicates suitability for automotive applications with extended temperature ranges.

Replacement Considerations

Direct substitutes within the same family include other LTC2637 variants with different resolutions (10-bit, 8-bit) or grades (Commercial C, Industrial I). Cross-family replacements like the LTC2636 offer SPI interfaces instead of I2C. Verify pinout compatibility and software register mapping when substituting.