link to page 13 link to page 13 100 MHz to 2.7 GHz, 45 dBRF Detector/ControllerAD8314FEATURES For convenience, the signal is internally ac-coupled, using a Complete RF detector/controller function 5 pF capacitor to a load of 3 kΩ in shunt with 2 pF. This high- Typical range:−58 dBV to −13 dBV pass coupling, with a corner at approximately 16 MHz, −45 dBm to 0 dBm, re 50 Ω determines the lowest operating frequency. Therefore, the source can be dc grounded. Frequency response from 100 MHz to 2.7 GHz Temperature-stable linear-in-dB response The AD8314 provides two voltage outputs. The first, V_UP, Accurate to 2.7 GHz increases from close to ground to about 1.2 V as the input signal Rapid response: 70 ns to a 10 dB step level increases from 1.25 mV to 224 mV. This output is intended Low power: 12 mW at 2.7 V for use in measurement mode. Consult the Applications section Power down to 20 μA for information on this mode. A capacitor can be connected
between the V_UP and FLTR pins when it is desirable to APPLICATIONS increase the time interval over which averaging of the input Cellular handsets (TDMA, CDMA , GSM) waveform occurs. RSSI and TSSI for wireless terminal devices The second output, V_DN, is an inversion of V_UP but with Transmitter power measurement and control twice the slope and offset by a fixed amount. This output starts