Logarithmic power detector (AD8307)

AD8307 is applied to the 500 MHz frequency within the dynamic range of 92 dB (-75 dBm- + 17 dBm) multistage logarithmic amplifier. It uses an 8-pin SOIC-N package, as shown in FIG. Use 2.7 ~ 5.5 V, 7.5 mA from a single supply, low-power, 3 V power consumption of only 22.5 mW. It can be widely applied to the signal power need accurate measurement of high frequency communication and instrumentation systems. When measuring power use AD8307, typical linear slope of 0.025 V / dB, a measurement range of -75 dBm ~ + 16 dBm. . Shielding shell and anti-reverse protection diode.

1, power supply voltage: 5V DC (typical current 6mA)

2, programmable gain attenuation range: 0 to 31.5DB stepping 0.5DB Input Output Impedance: 50 Ohm

3, module support change detection slope and zero setting.

4, Bandwidth: 1MHz to 500MHz (power detection at different frequencies as shown in Table 5-1)

5, shielded with a metal shell

6, to provide a PDF schematic

1, the detector can be adjusted according to the supply voltage zero, select the appropriate R4 level regulator R3 potentiometer zero point adjustment.

2, the detector can choose the appropriate slope adjustment R5 and R6 potentiometer to adjust the slope adjustment.

Module default mode of dynamic range 92DB, equivalent to the power range is (-75dbm to + 17dbm), that is to say the slope is 4 feet output 25mV / DB. Measurement parameters as follows: