LTC2662HUH-12#PBF

Overview

The LTC2662HUH-12#PBF is a five-channel, 12-bit current-source digital-to-analog converter (DAC) from Analog Devices. It provides high-compliance outputs with programmable ranges up to 300 mA and guaranteed 1 V dropout at 200 mA. The device supports flexible supply voltages from 2.85 V to 33 V per channel and includes an internal precision reference or external input option. It features a 3-wire SPI interface operating at clock rates up to 50 MHz and operates within a temperature range of -40°C to +125°C.

Feature Summary

• Five independent channels with programmable output ranges: 300 mA, 200 mA, 100 mA, 50 mA, 25 mA, 12.5 mA, 6.25 mA, and 3.125 mA
• High compliance voltage support up to 32 V load voltage with guaranteed 1 V dropout at 200 mA
• Integrated 1.25 V precision reference with 10 ppm/°C maximum temperature coefficient
• SPI/Microwire-compatible 3-wire serial interface with logic levels as low as 1.71 V

Applications

• Tunable Lasers
• Semiconductor Optical Amplifiers
• Resistive Heaters
• Current Mode Biasing
• Proportional Solenoid Drive

Procurement Notes

Verify the H suffix indicates the extended temperature range (-40°C to +125°C) compared to the I suffix (-40°C to +85°C). Confirm the 12-bit resolution variant matches system requirements against the 16-bit version. Ensure PCB layout accounts for thermal dissipation in the 32-lead QFN package.

Selection Notes

Select this part for applications requiring multiple independent current sources with high compliance voltage. The 12-bit resolution offers a balance between performance and data throughput. Consider the separate supply pins for each channel if noise isolation between outputs is critical. Verify that the 300 mA maximum output current meets the load requirements.

Part Context

This component belongs to the LTC2662 family of SoftSpan DACs. The HUH suffix denotes the industrial/high temperature grade and QFN package. Other variants include the LTC2662-16 for higher resolution and different temperature grades like C (commercial) and I (industrial).

Replacement Considerations

Direct substitutes within the same family include the LTC2662IUH-12#PBF for lower temperature operation or LTC2662HUH-16#PBF for higher resolution. Cross-family replacements require verification of pin compatibility and electrical specifications.