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AD8363:  50 Hz to 6 GHz 50 dB TruPwr™ Detector

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 communication ...More

AD8363:  50 Hz to 6 GHz 50 dB TruPwr™ Detector

Product 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 communication 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 dBm to at least 0 dBm, with large crest factors exceeding the requirements for accurate measurement of WiMAX, CDMA, W-CDMA, TD-SCDMA, multicarrier GSM, and LTE signals.

The AD8363 can determine the true power of a high frequency signal having a complex low frequency modulation envelope, or it can be used as a simple low frequency rms voltmeter. The high-pass corner generated by its internal offset-nulling loop can be lowered by a capacitor added on the CHPF pin.

Used as a power measurement device, VOUT is connected to VSET. The output is then proportional to the logarithm of the rms value of the input. The reading is presented directly in decibels and is conveniently scaled to 52 mV/dB, or approximately 1 V per decade; however, other slopes are easily arranged. In controller mode, the voltage applied to VSET determines the power level required at the input to null the deviation from the setpoint. The output buffer can provide high load currents.

The AD8363 has 1.5 mW power consumption when powered down by a logic high applied to the TCM2/PWDN pin. It powers up within about 30 μs to its nominal operating current of 60 mA at 25°C. The AD8363 is available in a 4 mm × 4 mm 16-lead LFCSP for operation over the −40°C to +125°C temperature range.

A fully populated RoHS-compliant evaluation board is also available.

Applications:
  • Power amplifier linearization/control loops
  • Transmitter power controls
  • Transmitter signal strength indication (TSSI)
  • RF instrumentation

    • Data Sheet, Rev 0, 05/2009

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    • Accurate rms-to-dc conversion from 50 Hz to 6 GHz
    • Single-ended input dynamic range of >50 dB
    • No balun or external input tuning required
    • Waveform and modulation independent, such as GSM/CDMA/W-CDMA/TD-SCDMA/WiMAX/LTE
    • Linear-in-decibels output, scaled: 52 mV/dB
    • Log conformance error: <±0.15 dB
    • Temperature stability: <±0.5 dB
    • Voltage supply range: 4.5 V to 5.5 V
    • Operating temperature range: −40°C to +125°C
    • Power-down capability to 1.5 mW
    • Small footprint, 4 mm × 4 mm, LFCSP
    • Voltage Supply (V): 4.5 to 5.5
    • Supply Current : 60mA
    • RF Freq (MHz): 6000MHz
    • Dynamic Range (dB): 50dB
    • Temp Stability (dB): ±0.5dB
    • Output Response: Linear in dB
    • Response Time (ns): 3000ns
    • Package: 4 x 4 mm CSP

    AD8363 Functional Block Diagram

    Similar Products

    arrow View Full Interactive Product Selection Table
    Part# Voltage Supply (V) Supply Current RF Freq (MHz) Dynamic Range (dB) Temp Stability (dB) Output Response Response Time (ns) Package Price* (1000-4999)
    AD8361 2.7 to 5.5 1.1 2500 30 ±0.25 Linear in Voltage 5000 6-Lead SOT-23, 8-Lead uSOIC $3.80
    AD8362 4.5 to 5.5 20 3800 60 ±1 Linear in dB 45 16-Lead SOP $6.33
    AD8363 4.5 to 5.5 60 6000 50 ±0.5 Linear in dB 3000 4 x 4 mm CSP $5.31
    AD8364 4.5 to 5.5 70 2700 60 ±0.5 Linear in dB 45 5 x 5 mm CSP $7.94
    ADL5500 2.7 to 5.5 1.1 6000 30 ±0.25 Linear in Voltage 10000 WLCSP $2.78
    ADL5501 2.7 to 5.5 1.1 6000 30 ±0.25 Linear in Voltage 6000 6-Lead SC-70 $2.42
    ADL5502 2.5 to 3.3 3 6000 30 ±0.25 Linear in Voltage 15000 WLCSP $5.97
    ADL5902 4.5 to 5.5 65 9000 60 ±0.3 Linear in dB - 4 x 4 mm CSP -
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    * The pricing listed here is provided only for budgetary purposes as recommended list price in U.S. Dollars in the United States ex factor per unit for the stated volume. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
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    Temperature Range
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    • Military : -55 to +125 degrees Celsius
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    • Automotive: -40 to +125 degrees Celsius
    Price
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    View PCN
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    *The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
    **Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.