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ADL5315:  Precision Wide-range (3 nA - 3 mA) High-Side Current Mirror

Product Details


The ADL5315 is a wide input current range precision high-side current mirror featuring a stable and user-adjustable input voltage. It is optimized for use with PIN photodiodes, but its flexibility and wide operating range make it suitable for a broad array of additional applications. The part provides a compact solution for the common and often challenging problem of interfacing an optical power monitoring device (such as a log amp) to the cathode-side of a PIN photodiode. The ADL5315 mirrors the current at the cathode at a 1:1 ratio over a six-decade range, producing an output exactly proportional to the reference current monitored. Competing optical current monitors have much higher mirror ratios over narrower dynamic ranges, rendering proportional outputs at very low input currents impossible, while discrete solutions are more tedious to implement and may require significantly more board space.

FEATURES and BENEFITS

  • Accurately mirrors input current (1:1 ratio) over 6 decades - enables monitoring at low signal levels
    Linearity 1% from 3 nA to 3 mA
  • Stable mirror input voltage
    Voltage held 1 V below supply using internal reference or may be set externally providing greater flexibility in design
  • Adjustable input current limit provides protection to the connected photodiode
  • 2.7 V to 8 V single-supply operation
  • Miniature 8-lead chip scale package (LFCSP 2 mm x 3 mm) saves valuable board space

Functional Block Diagram for ADL5315

Documentation

Title Content Type File Type
ADL5315: Precision Wide-Range (3 nA - 3 mA) High-Side Current Mirror Data Sheet (Rev 0, 11/2005) (pdf, 400 kB) Data Sheets PDF
CN-0056: Interfacing the ADL5315 High Side Current Mirror to a Translinear Logarithmic Amplifier in a Photodiode Power Detector Application  (pdf, 107 kB) Circuit Note PDF
Log Amps and Directional Couplers Enable VSWR Detection  (pdf, 2223 kB)
by Anil Rachakonda and Larry Hawkins, Analog Devices, Inc. (RF Design, 1/1/2007)
Technical Articles PDF
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

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Price, packaging, availability

ADL5315 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
ADL5315ACPZ-R2 Status: Production LFCSP:LEADFRM CHIP SCALE 8 Reel, 250 - $2.05 Y  Material Info Notify Me Purchase
ADL5315ACPZ-R7 Status: Production 8 ld LFCSP (3x2mm) 8 Ind Reel, 3000 - $1.95 Y  Material Info Notify Me Purchase Sample
ADL5315ACPZ-WP Status: Production 8 ld LFCSP (3x2mm) 8 Ind Tray, 50 $2.05 $1.95 Y  Material Info Notify Me Purchase
Price Table Help

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

ADL5315 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
ADL5315-EVALZ Status: Production Evaluation Board $100.19 Yes -

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.

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