The AD8306 is a complete IF limiting amplifier, providing both an accurate and stable RSSI scaling over temperature and supplies. It has a dynamic range of 100 dB and is suitable for applications such as receivers for frequency and phase modulation, very wide range IF and RF power measurement, and receiver signal strength indication (RSSI).
The AD8306 is a high‑precision limiting‑logarithmic amplifier covering 5 MHz to 400 MHz with a 100 dB dynamic range (‑91 dBV to +9 dBV). It offers a fully differential input, programmable limiter gain, and differential outputs up to 10 mA. The device operates from a single supply of 2.7 V to 6.5 V and includes ten full‑wave detectors for extended dynamic range.
The datasheet provides detailed specifications, absolute maximum ratings, ordering information, pin descriptions, and interface diagrams for enable, input, and limiter output. It also outlines typical performance characteristics, such as rise/fall times, small‑signal bandwidth, and power consumption, useful for designers of receivers, radar, sonar, and measurement equipment.
| Usable Frequency Range | 5 MHz – 400 MHz |
|---|---|
| Dynamic Range | 100 dB (‑91 dBV to +9 dBV) |
| Supply Voltage (Vs) | 2.7 V – 6.5 V |
| Input Resistance (INHI‑INLO) | ≈1 kΩ |
| Input Capacitance | 2.5 pF |
| Limiter Output Current | 0 mA – 10 mA |
| Small‑Signal Bandwidth | 3.5 MHz |
The AD8306 operates from a single supply voltage between 2.7 V and 6.5 V.
It provides a 100 dB dynamic range from –91 dBV to +9 dBV.
The enable interface requires about 300 ns to turn on the device.