LTC2637CDE-HZ12#PBF

Overview

The LTC2637CDE-HZ12#PBF is an octal 12-bit voltage-output DAC from Analog Devices, housed in a 14-lead DFN package. It features an integrated precision reference with a full-scale output of 2.5V and operates on a single 2.7V 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, low noise of 0.75mVP-P (0.1Hz to 200kHz), and rail-to-rail output buffering guaranteed monotonic over the commercial temperature range of 0°C to 70°C.

Feature Summary

• Octal architecture providing eight independent 12-bit voltage outputs in a compact 14-lead DFN package
• Integrated 10ppm/°C precision reference yielding a 2.5V full-scale output for the C-grade device
• I2C-compatible serial interface with selectable power-on reset to zero-scale or mid-scale
• Ultralow crosstalk between DAC channels (<3nV•s) and double-buffered data latches

Applications

• Mobile communications systems
• Process control and industrial automation
• Automatic test equipment
• Portable battery-powered equipment
• Automotive electronics
• Optical networking devices

Procurement Notes

Verify the specific ordering suffix #PBF indicates tube packaging rather than tape and reel. Confirm the 'C' grade designation aligns with the required 0°C to 70°C commercial operating temperature range. Ensure the DE package code corresponds to the 14-lead DFN footprint required by the PCB layout. Cross-reference the HZ suffix to confirm the internal reference mode resets to zero-scale upon power-up.

Selection Notes

Select this part when eight isolated voltage outputs are required within a small form factor. The 2.5V full-scale range suits applications where the signal swing does not require the 4.096V provided by the H-grade variant. Verify that the I2C bus speed requirements do not exceed 400kHz. Consider the H-grade version if operation below 0°C or above 70°C is necessary, or if a higher 4.096V output span is needed.

Part Context

This component belongs to the LTC2637 family of octal DACs, which also includes variants with different resolutions (8-bit, 10-bit), temperature grades (Industrial I, Automotive H), and package types (16-lead MSOP). The CDE-HZ12 configuration specifically targets cost-sensitive commercial applications requiring high channel density and precise internal referencing without external components.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should verify pin compatibility and electrical parameter equivalence before substituting with other octal DAC families.