DS3920

NOT RECOMMENDED FOR NEW DESIGNS

Fast Current Mirror

Provides Optimized APD Bias and Mirror for PON Applications

Data Sheet (Rev. 2) Product Selection Table

Part Models: 4
1ku List Price: Starting From $0.79

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Overview

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)

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.

Applications

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

Part Models: 4
1ku List Price: Starting From $0.79

Documentation

Data Sheet 1

DS3920: Fast Current Mirror Data Sheet (Rev.2) 12/19/2011

Reliability Data 1

DS3920 Reliability Data 01/12/2023

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
DS3920T-001+	Small-Outline Transistor Package	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
DS3920T-001+T	Small-Outline Transistor Package	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
DS3920T-002+	N/A	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
DS3920T-002+T	N/A	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Jun 29, 2018 - 1703N ASSEMBLY
		pcn_1703n
DS3920T-001+
DS3920T-001+T
DS3920T-002+
DS3920T-002+T
Feb 5, 2015 - 1370_CANCELLATION ASSEMBLY
		pcn_1370_cancellation
DS3920T-001+
DS3920T-001+T
DS3920T-002+
Feb 6, 2025 - 2455N ASSEMBLY
		pcn_2455n
DS3920T-002+
DS3920T-002+T

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Hardware Ecosystem

Parts	Product Life Cycle	Description
Current Sense Amplifiers 1
DS1842A	LAST TIME BUY	76V, APD, Dual Output Current Monitor
Digital to Analog Converters (DACs) 1
DS1875	LAST TIME BUY	PON Triplexer and SFP Controller
Interface Transceivers & Isolators 1
DS1865	LAST TIME BUY	PON Triplexer Control and Monitoring Circuit
Matched Resistors & Transistors 2
DS1842	NOT RECOMMENDED FOR NEW DESIGNS	76V, APD, Bias Output Stage with Current Monitoring

DS1843

NOT RECOMMENDED FOR NEW DESIGNS

Fast Sample-and-Hold Circuit

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