LTC2672IUH-16#PBF

Overview

The LTC2672IUH-16#PBF is a five-channel, 16-bit current source digital-to-analog converter (DAC) from Analog Devices. It provides high-compliance outputs with guaranteed 0.6 V dropout at 200 mA and supports eight programmable current ranges per channel, up to 300 mA. The device features an internal 1.25 V reference with a maximum temperature coefficient of 10 ppm/°C in the LFCSP package. It operates on analog supplies from 2.85 V to 5.5 V and digital I/O supplies from 1.71 V to VCC. Key specifications include ±0.45 LSB DNL, ±12 LSB INL, and a settling time of 21.1 μs for full-scale steps in the lowest range.

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
• Low dropout voltage guaranteed at 0.6 V at 200 mA output current
• Integrated precision 1.25 V reference with 10 ppm/°C maximum temperature coefficient (LFCSP)
• SPI-compatible 3-wire serial interface supporting clock rates up to 50 MHz

Applications

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

Procurement Notes

Verify the specific suffix IUH-16#PBF against the manufacturer's ordering guide to confirm the industrial temperature grade (-40°C to +125°C), 16-bit resolution, and 32-lead LFCSP package type. Ensure compatibility with system power supply rails and SPI logic levels before procurement.

Selection Notes

Select this component when multiple high-current, low-dropout current sources are required in a compact footprint. The ability to parallel channels allows for combined outputs up to 1.5 A or ultrafine adjustments. Consider the internal reference stability and the separate supply pins for each channel if independent output compliance voltages are needed.

Part Context

This part belongs to the LTC2672 family of five-channel SoftSpan DACs. The 'I' designation indicates the industrial temperature range, while 'UH' specifies the 32-lead lead frame chip scale package (LFCSP). The '#PBF' suffix denotes a lead-free and RoHS-compliant finish. Other variants exist with different resolutions (12-bit) and packages (WLCSP).

Replacement Considerations

Direct replacements within the same family include the LTC2672HUH-16#PBF for the commercial temperature range. For higher pin counts or different package types, consider the LTC2672 series WLCSP variants. Verify that any substitute maintains the 300 mA current capability and low dropout characteristics.