True Root Mean Square Response Power Detector Ad8362-50m-3.8ghz

Description

True Root Mean Square Response Power Detector Ad8362-50m-3.8ghz
1、 Product application:
1. wide working frequency: working frequency can be from 50Hz to 3 . 8GHz, suitable for wide band power detection, with flat input and output response.
2. high dynamic range: the input dynamic range is 60dB, and it is 50 Ω In a system, its input signal can be - 52 DBM to + 8dBm。
3. high precision and linearity provide a precise linear output voltage in decibel (DB), 50mV / dB。
4. true effective value power detection ad8362 is a true effective value response power detector. Its measurement results are independent of signal waveform, and can detect the RF power of complex modulation signals ( Including CDMA, w - CDMA, 8PSK, QAM and OFDM signals ) , suitable for is95, CDMA2000, 3GPP, GSM / Edge, MMDS and other broadband access devices.
5. there are two working modes
Ad8362 has two working modes: power measurement and controller. In Figure 1, in power measurement mode, Vout and Vset
The pin is directly connected, and the output voltage is proportional to the logarithm of the effective value of the input power. Every 1dB of input signal is added, the output voltage Voit increases by 50 MV, and the maximum can be reached ( Vs - 0 . one ) 5. The voltage reading directly reflects the power size, which is suitable for power meter or power detection in equipment. Another mode is controller mode. As shown in Figure 2, a reference voltage value is set at Vset end. When the power voltage detected by ad8362 is greater than the reference voltage value, voltage Vout outputs a high level. When the power voltage value detected by ad8362 is less than the reference voltage value, the typical linear slope is 0 when the voltage of voltage is less than the reference voltage value . 025 V / DB, measuring range is - 75 dBm ~+ 16 dBm。。 It has shield shell and anti reverse connection protection diode.
2、 Physical drawing of products:
3、 Technical index
1. Supply voltage: 5V DC (typical current 20mA)
2. Dynamic range of input signal: - 52 DBM to + 8 dBm
3. The module supports changing detection slope, power measurement and controller.
4. Bandwidth: 50MHz to 3.8ghz
5. Shielding with aluminum alloy tube metal shell
6. Input impedance: 50 ohm (input signal matched with balun)
4、 Detection slope and power measurement and controller (refer to circuit description)
5、 Measurement parameters
The dynamic range of the module's default mode is 60dB, equivalent to the power range (- 52dbm to + 8dbm), that is, the slope of the 4-pin output is 50mV / DB. The measurement parameters are shown in Table 5-1
6、 Notes / debugging experience:
In many applications, in order not to affect the detection slope of ad8362, it is better to add a voltage follower to the detection output