LTC2662HUH-16#TRPBF

Overview

The LTC2662HUH-16#TRPBF is a five-channel, 16-bit digital-to-analog converter featuring high-compliance current-source outputs. It supports eight programmable output ranges per channel, from 3.125 mA to 300 mA, with full resolution maintained across all spans. The device guarantees a maximum dropout voltage of 1 V at 200 mA and accommodates load voltages up to 32 V. Each channel has an independent supply pin (VDDx) operating between 2.85 V and 33 V. It includes a precision internal 1.25 V reference or external reference input, a monitor multiplexer, and a 50 MHz SPI-compatible serial interface.

Feature Summary

• Five independent 16-bit current-source DAC channels with programmable spans (3.125 mA to 300 mA).
• Guaranteed 1 V dropout voltage at 200 mA; supports load voltages up to 32 V.
• Independent analog supply pins (VDD0–VDD4) for each channel.
• Integrated 1.25 V precision reference (10 ppm/°C max) or external reference capability.
• 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 H suffix indicates the extended temperature range (-40°C to +125°C) as specified in the ordering guide. Confirm the #TRPBF suffix denotes tape-and-reel packaging containing 2500 units. Ensure the specific grade matches the application's thermal requirements.

Selection Notes

Select this component when multiple independent high-compliance current sources are required in a single package. The 16-bit resolution ensures fine control for sensitive applications like laser biasing. Verify that the external resistor on the FSADJ pin correctly sets the desired full-scale current if non-standard ranges are needed.

Part Context

This part belongs to the LTC2662 family of SoftSpan DACs. The 'H' designation specifies the industrial temperature range extension compared to standard variants. The '#TRPBF' suffix confirms it is lead-free and supplied in a reel format suitable for automated surface-mount assembly.

Replacement Considerations

Direct replacements within the same family include the LTC2662IUH-16#TRPBF for lower temperature ranges or the LTC2662CUH-16#TRPBF for commercial grades. Cross-family alternatives require matching the five-channel count, 16-bit resolution, and current source topology.

FAQ

How is the full-scale current adjusted?

The full-scale current is set by connecting a resistor between the FSADJ pin and GND. An internal 20 kΩ resistor is selected if FSADJ is tied to VCC, resulting in nominal ranges.

What is the maximum load voltage supported?

The device supports load voltages up to 32 V, provided the positive supply voltage (V+) does not exceed the negative supply (V-) plus 33 V.

Can the channels be paralleled?

Yes, the channels can be paralleled to allow for ultrafine adjustments of large currents or combined outputs of up to 1.5 A.