LTC2637HMS-HZ12#PBF

Overview

The LTC2637HMS-HZ12#PBF is an octal 12-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 supply voltage ranging from 4.5V to 5.5V. Communication is handled via a 2-wire I2C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. Key electrical specifications include a maximum integral nonlinearity (INL) error of ±2.5LSB, a settling time of 5µs at ±1LSB, and ultralow crosstalk between DAC channels of less than 3nV•s. The unit is housed in a 16-lead MSOP package.

Feature Summary

• Octal architecture providing eight independent 12-bit voltage outputs
• Integrated 4.096V precision reference with 10ppm/°C drift
• Rail-to-rail output buffers guaranteed monotonic over –40°C to 125°C
• I2C interface with selectable power-on reset to zero-scale or mid-scale

Applications

• Process control and industrial automation systems
• Automatic test equipment requiring multi-channel precision
• Portable battery-powered instrumentation
• Automotive electronic control units

Procurement Notes

Verify the specific ordering suffix #PBF indicates lead-free packaging compliant with RoHS standards. Confirm the H-grade designation matches the required automotive temperature range of –40°C to 125°C. Ensure the MS package type aligns with the PCB footprint design. Cross-reference the internal reference voltage requirement against system supply constraints.

Selection Notes

Select this part when eight synchronized 12-bit channels are required within a compact surface-mount footprint. The H-grade variant is necessary for applications operating above 85°C. Compare settling times and INL specifications against other family members like the LTC2637-L if lower supply voltages are preferred. Verify I2C address configuration capabilities using the CA pins for multi-device bus topologies.

Part Context

This component belongs to the LTC2637 family of octal DACs, which also includes variants with different resolutions (8-bit, 10-bit), reference voltages (2.5V L-grade), and package types (DFN). The HZ12 designation specifically identifies the 12-bit resolution, 4.096V internal reference, and zero-scale power-on reset behavior.

Replacement Considerations

Direct substitutes within the same family include LTC2637HMI12#PBF for mid-scale reset or LTC2637HZ12#PBF for commercial temperature grades. Alternative packages such as the 14-lead DFN version (LTC2637DE series) offer thermal advantages but require pinout adaptation.