LTC2662IUH-12#TRPBF

Overview

The LTC2662IUH-12#TRPBF is a five-channel, 12-bit current-source digital-to-analog converter (DAC) from Analog Devices. It provides high-compliance outputs with guaranteed 1V dropout at 200mA and supports load voltages up to 32V. Each channel features independent supply pins (2.85V to 33V) and programmable output ranges including 300mA, 200mA, 100mA, 50mA, 25mA, 12.5mA, 6.25mA, and 3.125mA. The device includes an internal 1.25V precision reference (10ppm/°C max), an analog multiplexer for monitoring, and a 50MHz SPI-compatible serial interface. It operates within a temperature range of -40°C to +85°C in a 5mm × 5mm 32-lead QFN package.

Feature Summary

• Five independent channels with 12-bit resolution and full-scale currents up to 300mA
• Per-channel programmable SoftSpan output ranges from 3.125mA to 300mA
• Flexible power supply architecture supporting 2.85V to 33V per channel
• Internal 1.25V reference with 10ppm/°C maximum temperature coefficient
• Analog multiplexer for voltage and current monitoring capabilities

Applications

• Tunable Lasers
• Semi-conductor Optical Amplifiers
• Resistive Heaters
• Current Mode Biasing
• Proportional Solenoid Drive

Procurement Notes

Verify the #TRPBF suffix indicates tape-and-reel packaging when sourcing components. Confirm that the 'I' grade designation aligns with the required operating temperature range of -40°C to +85°C for the specific application environment. Ensure the order quantity matches the reel specifications provided by the distributor.

Selection Notes

Select this model over the 16-bit variant if 12-bit resolution meets system accuracy requirements while potentially optimizing cost. Consider the external resistor option on the FSADJ pin if precise gain adjustment beyond nominal ranges is necessary. Verify that the 3-wire SPI interface timing parameters are compatible with the host controller's clock speeds.

Part Context

This component belongs to the LTC2662 family of SoftSpan DACs. The 'I' suffix denotes the industrial temperature grade (-40°C to +85°C). The 'UH' indicates the 32-lead LFCSP/QFN package type. The '#PBF' signifies lead-free construction, while '#TRPBF' specifically identifies the tape-and-reel packaging format for automated assembly.

Replacement Considerations

Direct substitutes include other members of the LTC2662 family such as the LTC2662IUH-16#PBF for higher resolution or the LTC2662CUH-12#PBF for commercial temperature range applications. Ensure pin compatibility and software register mapping remain consistent when migrating between variants.