AD8304

160 dB Logarithmic Amplifier with Photo-Diode Interface
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Product Details

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

checked 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.

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Product Details

This page provides ordering information for the AD8304 160 dB Logarithmic Amplifier with Photo-Diode Interface evaluation board.

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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.

AD8304 Material Declaration
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Overview

3 Reviews
3 out of 3 (100%) customers recommend this product.
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Most Helpful Review

by Anonymous
Is it possible to reduce minimum input current up to 1 pA?

Most Recent Review

by zzembower
I've gone through 3 of these chips so far. They say they have ESP but they are more sensitive then any chip I have used thus far. Make sure you are grounded all the time. However, after I got them working they were great. Absolutely amazing performance over the full 8 decades. Perfect for measuring current and the built in op amp is able to drive enough current for most uses.

All Reviews

by zzembower, 5 Aug 13
Easy to Break
I've gone through 3 of these chips so far. They say they have ESP but they are more sensitive then any chip I have used thus far. Make sure you are grounded all the time. However, after I got them working they were great. Absolutely amazing performance over the full 8 decades. Perfect for measuring current and the built in op amp is able to drive enough current for most uses.
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by rb, 2 Jul 13
use ad8403 adL8305 and log114
I use ad8304 adl8305 connect with a InGaAs PD to measure current. but i found some problems. 1. Ad8304 can only change to positive voltage , if my adc can measure +-5v, I must use external op. this point log114 is better. 2. the PD must one connect with Voltage bias, one connet with gnd, It can't one conncet with GND, one directly connect with AD8304. 3. the ADL8305 so small make me crazy. I can't put it on the PCB. 4. If I use a 16 bit SAR ADC, I want to measure current form100pa-1ma, that means form -70dBm to 0dBm, Can I get 0.01dBm,?
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by Anonymous, 10 Dec 12
This product has good features under recommended conditions.
Is it possible to reduce minimum input current up to 1 pA?
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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.


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Evaluation Boards Pricing displayed is based on 1-piece.
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.