LTC2672CUH-16#TRPBF

Overview

The LTC2672CUH-16#TRPBF is a five-channel, 16-bit current source digital-to-analog converter (DAC) from Analog Devices. It features SoftSpan technology allowing 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. It includes a precision internal 1.25 V reference with a maximum temperature coefficient of 10 ppm/°C for the LFCSP package. The unit operates on analog supply voltages from 2.85 V to 5.5 V and digital supplies from 1.71 V to VCC. It utilizes a 3-wire SPI-compatible interface with clock rates up to 50 MHz and is housed in a 32-lead lead frame chip scale package (LFCSP).

Feature Summary

• Five independent channels with 16-bit resolution and eight programmable current ranges per channel (up to 300 mA full-scale).
• Guaranteed low dropout voltage of 0.6 V at 200 mA with flexible 2.1 V to VCC output supply voltages.
• Integrated precision 1.25 V reference with 10 ppm/°C maximum temperature coefficient (LFCSP) and external reference option.
• 3-wire serial interface supporting 50 MHz clock rates, daisy-chain operation, and echo readback capabilities.

Applications

• Tunable lasers
• Semi-conductor optical amplifier biasing
• Resistive heaters
• Current mode biasing

Procurement Notes

Verify that the ordering suffix #TRPBF corresponds to the tape and reel packaging format required for automated assembly processes. Confirm that the LFCSP package thermal characteristics align with the printed circuit board design and operating environment constraints. Ensure the selected current range settings do not exceed the safe operating area limits defined in the specifications table.

Selection Notes

Select this component when multiple high-compliance current sources are required within a single package footprint. The SoftSpan feature allows optimization of power dissipation by matching the current range to the application load. Consider the internal reference stability if external precision references cannot be accommodated. Verify that the digital logic levels compatible with the 1.71 V minimum IOVCC match the controlling microcontroller or FPGA outputs.

Part Context

This part belongs to the LTC2672 family of SoftSpan DACs, which also includes 12-bit variants and WLCSP package options. The CUH-16 designation indicates the commercial temperature grade variant within the LFCSP package. Other family members may share similar pinouts but differ in resolution, package type, or extended temperature ratings such as the H-grade.

Replacement Considerations

Direct substitutes include other LTC2672 variants with different resolutions or packages, such as LTC2672CUH-12#TRPBF for 12-bit applications. Cross-family replacements require verification of pin compatibility and current drive capabilities. Ensure any alternative device supports the specific SoftSpan current range configurations required by the design.