LTC2672IUH-12#PBF

Overview

The LTC2672IUH-12#PBF is a five-channel, 12-bit digital-to-analog converter (DAC) featuring current source outputs. It operates with an analog supply voltage range of 2.85 V to 5.5 V and a digital I/O supply of 1.71 V to VCC. The device provides eight programmable output current ranges per channel, from 3.125 mA to 300 mA, with a guaranteed maximum dropout voltage of 0.6 V at 200 mA. Key performance metrics include a differential nonlinearity (DNL) of ±0.5 LSB and an integral nonlinearity (INL) of ±4 LSB. The unit utilizes a 32-lead LFCSP package and supports SPI-compatible serial interfaces.

Feature Summary

• Five independent channels with per-channel programmable current ranges: 300 mA, 200 mA, 100 mA, 50 mA, 25 mA, 12.5 mA, 6.25 mA, and 3.125 mA.
• Guaranteed low dropout voltage of 0.6 V at 200 mA output current.
• Integrated precision internal reference with a maximum temperature coefficient of 10 ppm/°C for the LFCSP package.
• Supports flexible single or dual-supply operation with separate voltage supplies provided for each output channel.

Applications

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

Procurement Notes

Verify the specific suffix #PBF indicates lead-free compliance and RoHS adherence as per manufacturer standards. Confirm the IUH designation corresponds to the industrial temperature grade (-40°C to +125°C) and the LFCSP-32 package type. Ensure compatibility with the required 3-wire SPI interface logic levels before integration.

Selection Notes

Select this component when multiple high-compliance current sources are required in a compact form factor. The 12-bit resolution is suitable for applications requiring moderate linearity, while the wide current range options allow for flexibility in load termination. Consider the internal reference stability if external references cannot be accommodated in the design.

Part Context

This part belongs to the LTC2672 family of SoftSpan DACs, which also includes 16-bit variants and different package options such as WLCSP. The 'I' suffix denotes the industrial temperature range, while 'UH' specifies the 32-lead lead frame chip scale package. The '#PBF' suffix typically indicates a lead-free and RoHS-compliant manufacturing variant.

Replacement Considerations

Direct pin-compatible replacements within the same family include other LTC2672 variants with different resolutions or packages, such as the LTC2672HUJ-16#PBF for 16-bit resolution in an LFCSP-40 package. Verify that any substitute maintains the required current output capabilities and thermal characteristics.