The AD8318 is a wideband detector/controller with a frequency range of 1 MHz to 8 GHz. It features high accuracy, good stability, low noise, and an integrated temperature sensor.
The AD8318 is a demodulating logarithmic amplifier covering 1 MHz to 8 GHz with a 70 dB dynamic range and low‑noise output. It offers single‑supply operation at 5 V, a power‑down mode under 1.5 mW, and an integrated temperature sensor for system monitoring.
The handbook includes functional block diagrams, pin configuration, absolute maximum ratings, typical performance curves, and an ordering guide for the 16‑lead LFCSP package. It also details controller mode operation, measurement mode settings, and temperature compensation features.
| Frequency Range | 0.001 – 8 GHz |
|---|---|
| +3 dB Dynamic Range (typ) | 70 dB |
| Logarithmic Slope | ≈ –24 mV/dB |
| Quiescent Current (ENBL=5 V) | 68 mA typical |
| Input Impedance (typ) | 957 Ω || 0.71 pF |
| Temperature Sensor Slope | 2 mV/°C |
The slope is approximately –24 mV per dB.
It provides a 2 mV per °C slope.