LTC2662IUH-12#PBF

Overview

The LTC2662IUH-12#PBF is a five-channel, 12-bit current-source digital-to-analog converter (DAC) from Analog Devices. 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 between 2.85 V and 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 logic levels as low as 1.71 V. The component is housed in a 5 mm × 5 mm 32-lead QFN package.

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 12-bit resolution across all current ranges with guaranteed monotonicity.
• Flexible power supply architecture allowing separate voltage supplies per output channel (2.85 V to 33 V).
• Integrated analog multiplexer for monitoring channel voltages and currents.

Applications

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

Procurement Notes

Verify the specific suffix 'IUH-12' corresponds to the industrial temperature range (-40°C to +85°C) and 12-bit resolution variant. Confirm the package type is the 32-lead QFN (5mm x 5mm). Ensure the ordering code matches the exact manufacturer designation for compatibility with design files.

Selection Notes

Select this component when five independent current sources are required with high compliance voltage up to 32 V. The 12-bit resolution is suitable for applications not requiring the 16-bit precision of the LTC2662-16 variant. Consider the separate VDDx pins if independent supply rails or different voltage levels per channel are necessary for the load requirements.

Part Context

This part belongs to the SoftSpan DAC family, characterized by programmable full-scale current ranges. The 'I' suffix indicates the industrial temperature grade, while 'UH' denotes the 32-lead QFN package. The '-12' specifies the 12-bit resolution version, distinguishing it from the 16-bit LTC2662-16 models within the same series.

Replacement Considerations

Direct functional replacements within the same series include the LTC2662CUH-12#PBF (commercial temp) and LTC2662HUH-12#PBF (high temp). For higher resolution needs, the LTC2662IUH-16#PBF is available. Verify that the replacement maintains the 32-QFN package and 12-bit specification if bit-depth is critical.