نیمه‌هادی‌ گسسته دیود و ترانزیستور تنظیم جریان

Product Attributes

Introduction

The DS3920 precision current mirror is designed for avalanche photodiode (APD) and PIN photodiode biasing and monitoring applications. The device offers a current clamp to limit current through the APD and a current mirror output that produces a signal proportional (5:1) to the APD current. A diode is also provided to limit the voltage at the current mirror output. The device accepts a +2.97V to +76V current mirror supply voltage. Internal current limiting (4.4mA or 20mA, typ) protects the monitored device from a short circuit to ground. The provided internal clamp diode protects the current mirror output from overvoltage. Additionally, the device features thermal shutdown if the die temperature reaches +150°C. The device is available in a 6-pin SOT23 package, and operates over the -40°C to +85°C extended temperature range. The DS3920 provides a fast, precision current mirror for photodiode-monitoring applications. The current mirror is accurate across a large dynamic range. The mirror response time is fast enough to comply with GPON Rx burst-mode monitoring requirements. The device has a built-in current limiting feature to protect photodiodes from large signal inputs, and an included thermal shutdown. A diode is provided to limit the voltage at the MIR output.

Features

• Wide Voltage Input Range: 2.97V to 76V
• Current Monitor
  • Wide 250nA to 2mA Range
  • 5:1 Mirror Ratio
  • Fast 50ns Time Constant
• Current Clamp (4.4mA or 20mA, typ)
• Voltage Clamp Protects Subsequent Output Circuitry
• 6-Pin SOT23 (MAX4007 Compatible)

Applications

• Avalanche Photodiode (APD) Biasing
• PIN Photodiode Monitoring
• GEPON, GPON, 10GEPON, XGPON: ONU and OLT