AD8309 500MHZ 100dB Dynamic Amplifier with Limiting Output for FSK PSK Demodulation

Description AD8309 is a 500 MHz detection logarithmic amplifier based on continuous detection technology suitable for received signal strength indicator RSSI and phase detection in cellular base stations and other radio transceiver applications The device provides a dynamic range of 100 dB an accuracy of ±0 4 dB in the middle 80 dB range and an operating frequency of up to 500 MHz The logarithmic output is proportional to the logarithm of the input signal and can provide a 0 4 V to 2 5 V DC signal within a 100 dB input range The device also provides a limiter output that can amplify the input signal by 100 dB and provides a stable limiter output with a maximum phase deviation of ±100 ps This limiter output is useful for demodulating FSK and PSK modulated signals Specification Power supply voltage 55V DC within a typical current value of 20mA Complete multistage logarithmic limiting IF amplifierDynamic range 100 dB 78 dBm to 22 dBm Re 50 O Programmable limiter gain and output currentDifferential output to 10 mA 2 4 V peak to peakTotal gain 100 dB bandwidth 500 MHzFrequency range 5MHZ 500MHZ Constant phase typical delay deviation 680 ps Power on time 500 ns sleep current 1 mARSSI scaling does not change with temperature and power supply voltage slope 20 mV dB intercept 95 dBmRSSI linearity ±0 4 dB to 200 MHz Single power supply 2 7 V to 6 5 VCurrent 16 mA typical value Input and output interface SMA outer screw inner holeProduct size 50 x