LTC2672HUH-16#PBF

Overview

The Analog Devices LTC2672HUH-16#PBF is a five-channel, 16-bit current source digital-to-analog converter (DAC) housed in a 32-lead LFCSP package. It features eight programmable output current ranges per channel, supporting full-scale outputs up to 300 mA. The device includes an integrated precision 1.25 V reference with a maximum temperature coefficient of 10 ppm/°C and an internal analog multiplexer for monitoring channel voltages and currents. It operates on a single or dual supply, with individual voltage supplies provided for each output channel.

Feature Summary

• Five-channel 16-bit resolution with selectable current ranges from 3.125 mA to 300 mA
• Integrated precision 1.25 V reference with 10 ppm/°C maximum temperature coefficient
• Internal analog multiplexer for monitoring channel output voltages and currents
• Separate voltage supply pin for each output channel with flexible 2.1 V to VCC operation

Applications

• Tunable lasers
• Semiconductor optical amplifier biasing
• Resistive heaters
• Current mode biasing

Procurement Notes

Verify the specific HUH-16 suffix against the manufacturer's ordering guide to confirm the package type and grade. Ensure the selected variant matches the required thermal performance and operating temperature range specifications for the intended application environment.

Selection Notes

Select this component when high DC accuracy and low dropout are required for multi-channel current control. Verify that the system can accommodate separate supply pins for each channel and that the SPI interface timing meets the design requirements for clock rates up to 50 MHz.

Part Context

This part belongs to the LTC2672 family of SoftSpan DACs, which also includes 12-bit variants and different package options such as WLCSP. The HU designation indicates a specific thermal and electrical grade within the broader product line designed for precision industrial and optical applications.

Replacement Considerations

Direct replacements include other parts within the LTC2672 family, such as the LTC2672-12 variants for lower resolution needs, or the LTC2662 series for similar functionality with different interface or packaging constraints. Verify pin compatibility and software register mapping before substitution.

FAQ

What is the maximum output current per channel?

The maximum full-scale output current per channel is 300 mA, with eight programmable ranges available.

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.

What is the typical settling time for the 16-bit resolution?

The typical settling time to ±0.0015% (±1 LSB at 16-bit) for a full-scale step in the 3.125 mA range is 21.1 μs.