LTC2662IUH-16#PBF

Overview

The LTC2662IUH-16#PBF is a five-channel, 16-bit current-source digital-to-analog converter manufactured by Analog Devices Inc. It provides high-compliance outputs with guaranteed 1 V dropout at 200 mA and supports load voltages up to 32 V. Each channel features independent supply pins (VDDx) operating from 2.85 V to 33 V. The device includes an internal 1.25 V reference with a maximum temperature coefficient of 10 ppm/°C and accepts external references. It utilizes a 3-wire SPI/Microwire-compatible serial interface with clock rates up to 50 MHz and operates within a junction temperature range of -40°C to +85°C.

Feature Summary

• Five channels with per-channel programmable output ranges: 300 mA, 200 mA, 100 mA, 50 mA, 25 mA, 12.5 mA, 6.25 mA, and 3.125 mA.
• Full 16-bit resolution across all current ranges with guaranteed monotonicity.
• Internal precision 1.25 V reference (10 ppm/°C max) or external reference input option.
• Separate voltage supply per output channel (VDD0–VDD4) supporting 2.85 V to 33 V.

Applications

• Tunable Lasers
• Semiconductor Optical Amplifiers
• Resistive Heaters
• Current Mode Biasing
• Proportional Solenoid Drive

Procurement Notes

Verify the suffix 'I' indicates the industrial temperature grade (-40°C to +85°C). Confirm the package type is 32-Lead QFN (5 mm × 5 mm). Ensure the specific revision matches the required datasheet specifications for DC performance parameters such as DNL and INL.

Selection Notes

Select this part when five independent high-current channels are required in a single package. The SoftSpan feature allows flexible full-scale adjustment via the FSADJ pin. For applications requiring higher temperatures, consider the H-grade variant. Ensure the load voltage does not exceed 32 V and that the power supply sequencing adheres to the specified limits to prevent latch-up.

Part Context

This component belongs to the LTC2662 family of SoftSpan DACs. The 'I' suffix denotes the industrial temperature range (-40°C to +85°C), while the 'H' suffix denotes the extended range (-40°C to +125°C). The '16' indicates 16-bit resolution, whereas '12' would indicate 12-bit resolution. All variants share the same 32-lead QFN package and functional architecture.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Designers should verify compatibility with existing PCB layouts and thermal requirements if substituting with other members of the LTC2662 family, such as the LTC2662HUH-16#PBF for extended temperature operation.