Features and Benefits
- Optimized for Fiber Optic Photodiode Interfacing
- Eight Full Decades of Range
- Single-Supply Operation
(3.0 V– 5.5 V)
- Complete and Temperature Stable
- 1-, 2-, or 3-Pole Low-Pass Filtering at Output
- Miniature 14-Lead Package (TSSOP)
- Accurate Laser-Trimmed Scaling:
Logarithmic Slope of 10 mV/dB (at VLOG Pin)
Basic Logarithmic Intercept at 100 pA
Easy Adjustment of Slope and Intercept
- Output Bandwidth of 10 MHz, 15 V/µs Slew Rate
- Low Power: ~4.5 mA Quiescent Current (Enabled)
The AD8304 is a monolithic logarithmic detector optimized for the measurement of low frequency signal power in fiber optic systems. It uses an advanced translinear technique to provide an exceptionally large dynamic range in a versatile and easily used form. Its wide measurement range and accuracy are achieved using proprietary design techniques and precise laser trimming. In most applications only a single positive supply, VP, of 5 V will be required, but 3.0 V to 5.5 V can be used, and certain applications benefit from the added use of a negative supply, VN. When using low supply voltages, the log slope is readily altered to fit the available span. The low quiescent current and chip disable features facilitate use in battery-operated applications.
The AD8304 is available in a 14-lead TSSOP package and specified for operation from -40°C to +85°C.
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
Documentation & Resources
Noise Figure and Logarithmic Amplifiers [The Wit and Wisdom of Dr. Leif—6]6/1/2008 Analog Dialogue
Closed-Loop Control of Variable Optical Attenuators with Logarithmic Analog Processing12/1/2003 Analog Dialogue
Mixed Signal ICs Lend Flexibility to EDFA Control Applications4/1/2002
Logarithmic Processing Applied to Network Power Monitoring1/1/2002
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 Number||Material Declaration||Reliability Data||Pin/Package Drawing||CAD Symbols, Footprints & 3D Models|
|AD8304ARUZ||Material Declaration||Reliability Data||14-Lead TSSOP|
|AD8304ARUZ-RL7||Material Declaration||Reliability Data||14-Lead TSSOP|
|Wafer Fabrication Data|
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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.