LTC2672HUH-12#TRPBF

Overview

The LTC2672HUH-12#TRPBF is a five-channel, 12-bit current source digital-to-analog converter (DAC) from Analog Devices Inc. It features per-channel programmable output current ranges of 300 mA, 200 mA, 100 mA, 50 mA, 25 mA, 12.5 mA, 6.25 mA, and 3.125 mA. The device guarantees a maximum dropout voltage of 0.6 V at 200 mA and supports flexible single- or dual-supply operation with separate voltage supplies for each output channel. Internal switches allow outputs to be pulled to an optional negative supply. The part includes a precision integrated 1.25 V reference with a maximum temperature coefficient of 10 ppm/°C in the LFCSP package. It operates over a temperature range of -40°C to +125°C and utilizes a 3-wire SPI-compatible serial interface.

Feature Summary

• Five independent channels with 12-bit resolution and eight selectable full-scale current ranges up to 300 mA.
• Guaranteed low dropout voltage of 0.6 V at 200 mA with dedicated analog supply pins per channel.
• Integrated precision 1.25 V reference with 10 ppm/°C maximum temperature coefficient (LFCSP).
• Internal analog multiplexer for monitoring channel voltages and currents via a MUX pin.

Applications

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

Procurement Notes

Verify that the specific ordering suffix #TRPBF corresponds to the tape and reel packaging variant as indicated by standard manufacturer conventions. Confirm the H-grade designation ensures operation within the specified -40°C to +125°C temperature range. Ensure the LFCSP package thermal characteristics are accounted for in the system design, particularly regarding junction-to-ambient resistance values provided in the datasheet.

Selection Notes

Select this component when high compliance current sources with low dropout are required for multi-channel applications. The LTC2672 allows channels to be paralleled for combined outputs up to 1.5 A or ultrafine adjustments. Consider the internal reference specifications if external references are not desired. Verify that the digital interface voltage levels (IOVCC) are compatible with the host controller logic levels, supporting inputs as low as 1.71 V.

Part Context

The LTC2672 belongs to Analog Devices' SoftSpan DAC family, designed for applications requiring precise current control. The HUJ suffix typically denotes the LFCSP package, while the TRPBF suffix indicates tape and reel packaging with lead-free finish. This model specifically offers 12-bit resolution, distinguishing it from the 16-bit LTC2672-16 variant which shares similar electrical characteristics but offers higher resolution.

Replacement Considerations

Direct replacements include other variants within the LTC2672 family such as the LTC2672-16 for increased resolution or different package options like the WLCSP if board space is critical. Ensure any substitute maintains the 300 mA current capability and low dropout requirements. Verify compatibility with existing SPI firmware and power supply configurations.