AD8312ACBZ-P7

AD8312 is a complete, low cost subsystem for the measurement of radio frequency (RF) signals in the frequency range of 50MHz to 3.5GHz. It has a typical dynamic range of 45dB and is intended for use in a wide variety of cellular handsets and other wireless devices. It provides a wider dynamic range and better accuracy than possible using discrete diode detectors. Its high sensitivity allows measurement at low power levels, thus reducing the amount of power that needs to be coupled to the detector. For convenience, the signal is internally ac-coupled, using a 5pF capacitor to a load of 3kohm in shunt with 1.3pF. This high pass coupling, with a corner at approximately 16MHz, determines the lowest operating frequency. Therefore, the source may be dc grounded. Application includes cellular handsets (GSM, CDMA, WCDMA), RSSI and TSSI for wireless terminal devices, transmitter power measurement.

• Complete RF detector function
• DC resistance to COMM is 100kohm (typ, VS = 3V, TA = 25°C)
• Equivalent power range from -45 to 0dBm (52.3ohm external termination)
• Input impedance is 3050 / 1.4ohm / pF (typ, VS = 3V, TA = 25°C, f = 50MHz)
• Slope is 20.25mV/dB (typ, VS = 3V, TA = 25°C)
• Intercept is -51.5dBm (typ, VS = 3V, TA = 25°C, f = 50MHz)
• Temperature sensitivity is 0.0010dB/°C (typ, 25°C ≤ TA ≤ +85°C, f = 50MHz)
• ±1dB dynamic range is 48dB (typ, TA = 25°C, VS = 3V, f = 50MHz)
• Temperature sensitivity is 0.0002dB/°C (typ, 25°C ≤ TA ≤ +85°C, f = 50MHz)
• 6 ball WLCSP package, operating temperature range from -40°C to +85°C

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ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party