LTC2662CUH-12#TRPBF

Overview

The LTC2662CUH-12#TRPBF is a five-channel, 12-bit current-source digital-to-analog converter (DAC) from Analog Devices Inc. It provides high-compliance outputs with guaranteed 1 V dropout at 200 mA and supports load voltages up to 32 V. Each channel features programmable output ranges of 300 mA, 200 mA, 100 mA, 50 mA, 25 mA, 12.5 mA, 6.25 mA, or 3.125 mA. The device includes a precision internal 1.25 V reference with a maximum temperature coefficient of 10 ppm/°C and accepts external references. It utilizes a 3-wire SPI/Microwire-compatible serial interface operating at clock rates up to 50 MHz with logic levels as low as 1.71 V.

Feature Summary

• Five independent channels with per-channel programmable current ranges from 3.125 mA to 300 mA
• High compliance voltage support up to 32 V with guaranteed 1 V dropout at 200 mA
• Integrated precision 1.25 V reference (10 ppm/°C max) with external reference input option
• 3-wire SPI serial interface compatible with Microwire, supporting clock rates up to 50 MHz

Applications

• Tunable Lasers
• Semiconductor 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 'C' grade designation corresponds to the commercial operating temperature range of 0°C to 70°C. Ensure the specific lot date code meets project requirements prior to procurement.

Selection Notes

Select this model for applications requiring five independent current sources with 12-bit resolution. The 12-bit variant offers faster settling times compared to the 16-bit version. Ensure the system design accommodates the separate supply pins (VDD0–VDD4) required for each output channel to maintain high compliance voltages.

Part Context

This component belongs to the SoftSpan DAC family, characterized by flexible power supply ranges and programmable output spans. The LTC2662 series integrates analog multiplexers for monitoring voltages and currents, providing diagnostic capabilities alongside standard conversion functions in a compact 32-lead QFN package.

Replacement Considerations

The LTC2662IUH-12#PBF serves as an industrial-grade alternative with an extended temperature range of -40°C to 85°C. For higher resolution needs, the LTC2662-16 variants provide 16-bit accuracy but exhibit longer settling times.