Part # AD8314 datasheet

Part Manufacturer: Analog Devices

Analog Devices

Part Description: AD8314 100 MHz to 2.7 GHz 45 dB RF Detector/Controller Data Sheet (Rev. B)

Part Details:

100 MHz to 2.7 GHz, 45 dB RF Detector/Controller AD8314 FEATURES For convenience, the signal is internally ac-coupled, using a Complete RF detector/controller function 5 pF capacitor to a load of 3 k 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 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 A 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 at about 2.25 V (provided the supply voltage is 3.3 V) for the GENERAL DESCRIPTION minimum input and falls to a value close to ground at the The AD8314 is a complete low cost subsystem for the maximum input. This output is intended for analog control measurement and control of RF signals in the frequency range loop applications. A setpoint voltage is applied to VSET, and of 100 MHz to 2.7 GHz, with a typical dynamic range of 45 dB, V_DN is then used to control a VGA or power amplifier. Here intended for use in a wide variety of cellular handsets and other again, an external filter capacitor can be added to extend the wireless devices. It provides a wider dynamic range and better averaging time. Consult the Applications section for accuracy than possible using discrete diode detectors. In information on this mode. particular, its temperature stability is excellent over the full The AD8314 is available in 8-lead MSOP and 8-lead LFCSP operating range of -40°C to +85°C. packages and consumes 4.5 mA from a 2.7 V to 5.5 V supply. Its high sensitivity allows control at low power levels, thus When powered down, the typical sleep current is 20 A.

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AD8314.pdf Datasheet