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.
Features and Benefits(3.0 V– 5.5 V) Logarithmic Slope of 10 mV/dB (at VLOG Pin) Basic Logarithmic Intercept at 100 pA Easy Adjustment of Slope and Intercept | OpticalAmplifiers |
| Document | note |
| AD8304: 160 dB Range (100 pA-10 mA) Logarithmic Converter Data Sheet (Rev. A) | PDF 573 kB |
| Document | note |
| AN-643: Closed-Loop Control Circuit Implementation of the ADuC832 MicroConverter®IC and the AD8305 Logarithmic Converter in a Digital Variable Optical Attenuator (Rev. 0) | PDF 395 kB |
| Part Number | Package | Packing Qty | Temp Range | Price 100-499 | Price 1000+ | RoHS |
|---|---|---|---|---|---|---|
| AD8304ARU Production | 14 ld TSSOP | OTH 96 | -40 to 85C | 16.08 | 14.62 | N |
| AD8304ARU-REEL7 Production | 14 ld TSSOP | REEL 1000 | -40 to 85C | 0 | 14.62 | N |
| AD8304ARUZ Production | 14 ld TSSOP | OTH 96 | -40 to 85C | 13.92 | 12.65 | Y |
| AD8304ARUZ-RL7 Production | 14 ld TSSOP | REEL 1000 | -40 to 85C | 0 | 12.65 | Y |
| Part Number | Description | Price | RoHS |
|---|---|---|---|
| AD8304-EVALZ | Evaluation Board | 100.19 | Y |
