AD8307 DC to 500 MHz, 92 dB Logarithmic Amplifier

The AD8307 is the first logarithmic amplifier made available in an 8-lead SOIC_N package. It is a complete 500 MHz monolithic demodulating logarithmic amplifier based on the progressive compression (successive detection) technique, providing a dynamic range of 92 dB to ±3 dB law conformance and 88 dB to a tight ±1 dB error bound at all frequencies up to 100 MHz. The AD8307 is extremely stable and easy to use, requiring no significant external components. A single-supply voltage of 2.7 V to 5.5 V at 7.5 mA is needed. A fast acting CMOS-compatible control pin can disable the AD8307 to a standby current of 150 μA.

The AD8307 operates over the industrial temperature range of −40°C to +85°C and is available in an 8-lead SOIC package and an 8-lead PDIP.

Applications
  • Conversion of signal level to decibel form
  • Transmitter antenna power measurement
  • Receiver signal strength indication (RSSI)
  • Low cost radar and sonar signal processing
  • Network and spectrum analyzers (to 120 dB)
  • Signal level determination down to 20 Hz
  • True decibel ac mode for multimeters

Features and Benefits
  • Complete multistage logarithmic amplifier
  • 92 dB dynamic range: –75 dBm to +17 dBm to –90 dBm using matching network
  • Single supply of 2.7 V minimum at 7.5 mA typical
  • DC to 500 MHz operation, ±1 dB linearity
  • Slope of 25 mV/dB, intercept of –84 dBm
  • Highly stable scaling over temperature
  • Fully differential dc-coupled signal path
  • 100 ns power-up time, 150 µA sleep current
    • RF & Microwave
    Data Sheets
    Documentnote
    AD8307: Low Cost DC-500 MHz, 92 dB Logarithmic Amplifier Data Sheet (Rev. E)PDF 501 kB
    Application Notes
    Documentnote
    AN-1040: RF Power Calibration Improves Performance of Wireless Transmitters (Rev. 0)PDF 152 kB
    AN-691: Operation of RF Detector Products at Low Frequency (Rev. 0)PDF 778 kB
    Frequently Asked Questions
    Documentnote
    Order Information
    Part NumberPackagePacking QtyTemp RangePrice 100-499Price 1000+RoHS
    AD8307ANZ Production8 ld PDIPOTH 50-40 to 85C7.196.07Y
    AD8307AR Production8 ld SOICOTH 98-40 to 85C8.37.01N
    AD8307AR-REEL Production8 ld SOICREEL 2500-40 to 85C07.01N
    AD8307AR-REEL7 Production8 ld SOICREEL 750-40 to 85C8.37.01N
    AD8307ARZ Production8 ld SOICOTH 98-40 to 85C7.196.07Y
    AD8307ARZ-REEL Production8 ld SOICREEL 2500-40 to 85C06.07Y
    AD8307ARZ-RL7 Production8 ld SOICREEL 750-40 to 85C7.196.07Y
    Reference Materials
    AD8307: Low Cost DC-500 MHz, 92 dB Logarithmic Amplifier Data Sheet (Rev. E) ad8307
    AN-1040: RF Power Calibration Improves Performance of Wireless Transmitters (Rev. 0) ad8307
    AN-691: RF检波器的低频工作特性 (Rev. 0) ad8307
    AN-1040: RF功率校准提高无线发射机的性能 (Rev. 0) ad8307
    AN-691: Operation of RF Detector Products at Low Frequency (Rev. 0) ad8307
    Design and Operation of Automatic Gain Control Loops for Receivers in Modern... ad8369
    RF Source Booklet adf9010
    Measurement and Control of RF Power, Part I ad640
    Measurement and Control of RF Power, Part II ad640
    Measurement and Control of RF Power, Part III ad640
    Log Amps and Directional Couplers Enable VSWR Detection ad640
    Measuring VSWR and Gain in Wireless Systems ad640
    Measuring the RF Power in CDMA2000 and W-CDMA High Power Amplifiers (HPAs) ad640
    Detecting Fast RF Bursts using Log Amps ad640
    Make Precise Base-Station Power Measurements ad640
    Design a Logamp RF Pulse Detector ad640
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