LTC2664IUH-16#PBF

Overview

The LTC2664IUH-16#PBF is a quad-channel, 16-bit digital-to-analog converter (DAC) from Analog Devices. It features independently programmable SoftSpan output ranges up to ±10V, including 0V to 5V, 0V to 10V, ±2.5V, ±5V, and ±10V. The device integrates a precision reference with a maximum temperature coefficient of 10ppm/°C and built-in rail-to-rail output buffers capable of driving ±10mA. It operates on analog supplies of V+ (4.5V to 15.75V), V– (-15.75V to 0V), and VCC (4.5V to 5.5V), with a digital I/O supply (IOVCC) ranging from 1.71V to VCC + 0.3V. The component utilizes a 3-wire SPI/Microwire interface with clock rates up to 50MHz and is housed in a 32-lead QFN package.

Feature Summary

• Quad 16-bit resolution with five independently programmable output ranges up to ±10V
• Integrated precision reference with 10ppm/°C maximum temperature coefficient
• Rail-to-rail output buffers guaranteeing monotonicity and ±10mA drive capability
• A/B toggle capability via dedicated pin or software command for fast updates

Applications

• Optical networking systems
• Precision instrumentation
• Data acquisition equipment
• Automatic test equipment
• Process control and industrial automation

Procurement Notes

Verify the specific suffix #PBF indicates lead-free packaging. Confirm the 'I' grade designation corresponds to the -40°C to 85°C operating temperature range required for the application. Ensure the 32-lead QFN footprint matches the PCB layout specifications.

Selection Notes

Select this model for applications requiring four independent channels with high linearity and flexible voltage ranges. The 'I' suffix denotes industrial temperature performance. Consider the external reference mode if higher precision than the internal 10ppm/°C reference is needed, or if the input voltage range allows for expanded output spans.

Part Context

This part belongs to the LTC2664 family, which includes 12-bit variants and commercial/automotive temperature grades. The IUH-16 variant specifically provides 16-bit resolution within the industrial temperature range (-40°C to 85°C). Other family members include the LTC2664CUH-16 and LTC2664HUH-16 for commercial and automotive grades respectively.

Replacement Considerations

Direct replacements within the same package and pinout include the LTC2664CUH-16#PBF for commercial temperature ranges and the LTC2664HUH-16#PBF for automotive/high-temperature applications. Verify that the temperature rating of the substitute meets the environmental requirements.