ADL5309 Overview
The ADL5309 contains dual monolithic logarithmic transimpedance amplifiers that are optimized for measuring low-frequency and wide dynamic range optical signal power in fiber optic systems. The device produces highly accurate, temperature pensated output voltages that are proportional to the logarithm of the ratio between the input current at the INP1 and INP2 pins and the internally generated reference currents....
ADL5309 Key Features
- 188 dB electrical dynamic range and 94 dB optical dynamic range
- Dual-channel current inputs for direct optical gain measurements
- Accurately trimmed logarithmic response
- Logarithmic slope 200 mV/decade
- Logarithmic conformance error ±0.4 dB over temperature
- Offset trimmed at 70°C to reduce dark current
- Integrated LDO: 26 dB PSRR at 60 Hz and 100 pA input current (VCC = 3.0 V)
- I2C adjustable
- Photodiode bias voltage
- Trade-off between noise and response time at low input cur