LTC2672IUH-12#TRPBF

Overview

The LTC2672IUH-12#TRPBF is a five-channel, 12-bit digital-to-analog converter (DAC) featuring current source outputs with a maximum full-scale range of 300 mA per channel. It operates on an analog supply voltage (VCC) from 2.85 V to 5.5 V and a digital supply (IOVCC) from 1.71 V to VCC. The device guarantees a maximum dropout voltage of 0.6 V at 200 mA. Key specifications include a differential nonlinearity (DNL) of ±0.5 LSB, an integral nonlinearity (INL) of ±4 LSB, and a settling time of 3.8 μs for the 12-bit resolution. It utilizes a 3-wire SPI-compatible interface with clock rates up to 50 MHz.

Feature Summary

• Five independent channels with programmable output current ranges: 300 mA, 200 mA, 100 mA, 50 mA, 25 mA, 12.5 mA, 6.25 mA, and 3.125 mA.
• Integrated precision internal reference with a maximum temperature coefficient of 10 ppm/°C for the LFCSP package.
• Flexible power architecture allowing separate voltage supplies per output channel (VDDx) ranging from 2.1 V to VCC.
• Internal switches enable pulling any output to an optional negative supply (V−).
• Analog multiplexer provides monitoring capabilities for voltages and currents across all channels.

Applications

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

Procurement Notes

Verify that the ordering suffix #TRPBF corresponds to the tape and reel packaging format rather than tube packaging. Confirm the specific grade (e.g., H-grade for extended temperature operation) matches the application requirements. Ensure the component is sourced from authorized distributors to guarantee authenticity and traceability. Check for any recent product change notifications regarding pinout or electrical parameter updates.

Selection Notes

Select this component when multiple high-compliance current sources are required in a compact footprint. The 12-bit resolution is suitable for applications not requiring the higher precision of the 16-bit variant. Consider the separate VDDx pins for optimizing power dissipation and dropout voltage per channel. Verify that the system logic levels are compatible with the 1.71 V minimum IOVCC requirement.

Part Context

This part belongs to the LTC2672 family, which includes both 12-bit and 16-bit resolution variants. The 'UH' designation indicates the 32-lead lead frame chip scale package (LFCSP). The '#PBF' suffix denotes lead-free composition compliant with RoHS standards. The 'I' grade specifies an operating temperature range of -40°C to +125°C.

Replacement Considerations

Direct replacements within the same family include the LTC2672-16 variants for higher resolution needs, provided the pinout remains compatible. Other Analog Devices multi-channel DACs may serve as alternatives if current sourcing capability or channel count differs. Verify thermal resistance values and PCB layout requirements when substituting packages.