AD8363 Datasheet | Analog Devices

FEATURES Accurate rms-to-dc conversion from 50 Hz to 6 GHz Single-ended input dynamic range of >50 d B No balun or external input tuning required Waveform and modulation independent RF power detection Linear-in-decibels output, scaled: 52 m V/d B Log conformance error: <±0.15 d B Temperature stability: <±0.5 d B Voltage supply range: 4.5 V to 5.5 V Operating temperature range: - 40°C to +125°C Power-down capability to 1.5 m W Small footprint, 4 mm × 4 mm, LFCSP APPLICATIONS Power amplifier linearization/control loops Multi-Standard, Multi-Carrier Wireless Infrastructure (MCGSM, CDMA, WCDMA, TD-SCDMA, Wi MAX, LTE) Transmitter power control Transmitter signal strength indication (TSSI) RF instrumentation GENERAL DESCRIPTION The AD8363 is a true rms responding power detector that can be directly driven with a single-ended 50 Ω source. This feature makes the AD8363 frequency versatile by eliminating the need for a balun or any other form of external input tuning for operation up to 6 GHz. The AD8363 provides an accurate power measurement, independent of waveform, for a variety of high frequency munication and instrumentation systems. Requiring only a single supply of 5 V and a few capacitors, it is easy to use and provides high measurement accuracy. The AD8363 can operate from arbitrarily low frequencies to 6 GHz and can accept inputs that have rms values from less than - 50 d Bm to at least 0 d Bm, with large crest factors exceeding the requirements for accurate measurement of Wi MAX, CDMA, W-CDMA, TD-SCDMA, multicarrier GSM, and LTE signals. The AD8363 can determine the true power of a high frequency signal having a plex low frequency modulation envelope, or it can be used as a simple low frequency rms voltmeter. The highpass corner generated by its internal offset-nulling loop can be lowered by a capacitor added on the CHPF pin. 50 Hz to 6 GHz, 50 d B Tru Pwr™ Detector FUNCTIONAL BLOCK DIAGRAM VTGT 12 VREF 11 VPOS 10 M 9 NC 13 8 TEMP INHI 14 INLO 15 X2 7...