LTC2662IUH-16#TRPBF

Overview

The LTC2662IUH-16#TRPBF is a five-channel, 16-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 (VDDx) ranging from 2.85V to 33V and internal switches for connection to an optional negative supply (V–). The device offers eight programmable current ranges per channel, from 3.125mA to 300mA, maintaining full 16-bit resolution across all spans. It integrates a precision 1.25V reference with a maximum temperature coefficient of 10ppm/°C and accepts external references. Communication is handled via a 50MHz SPI-compatible 3-wire serial interface operating on logic levels as low as 1.71V.

Feature Summary

• Five independent channels with 16-bit resolution and programmable output ranges (3.125mA to 300mA)
• Flexible supply architecture: VCC 2.85V–5.5V, IOVCC 1.71V–5.5V, V+ up to 33V, and V– down to -15.75V
• Integrated 1.25V precision reference (10ppm/°C max) with external reference input capability
• Internal analog multiplexer for monitoring channel voltages and currents

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 this component. Confirm that the 'I' grade designation meets the required operating temperature range of -40°C to +85°C for the specific application environment. Ensure the ordering documentation matches the exact part number to avoid confusion with the 12-bit variant or different package options.

Selection Notes

Select the LTC2662IUH-16#TRPBF for applications requiring five independent high-current outputs with precise control. The device supports paralleling channels to achieve combined outputs up to 1.5A. Designers must account for the separate supply requirement per channel (VDD0-VDD4) and ensure the positive supply (V+) exceeds the highest VDDx voltage. The internal switch allows connecting any output to the negative supply rail if bidirectional sourcing/sinking is not required but pull-down functionality is needed.

Part Context

This component belongs to the SoftSpan DAC family, characterized by its ability to maintain full resolution across widely varying current spans. The IUH-16 variant specifically denotes the industrial temperature grade (-40°C to +85°C), 16-bit resolution, and QFN-32 package. It serves as a high-performance alternative to lower-resolution DACs in multi-channel current control systems.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.