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POWER DETECTORS - SMT
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The HMC611LP4(E) Logarithmic Detector/Controller
converts RF signals at its input, to a proportional DC
voltage at its output. The HMC611LP4(E) employs
a successive compression topology which delivers
extremely high dynamic range and conversion accuracy
over a wide input frequency range. As the input power
is increased, successive ampli ers move into saturation
one by one creating an accurate approximation of the
logarithm function. The output of a series of square law
detectors is summed, converted into voltage domain
and buffered to drive the LOGOUT output. For detection
mode, the LOGOUT pin is shorted to the VSET input,
and will provide a nominal logarithmic slope of -25mV/
dB and an intercept of 18 dBm (22 dBm for ƒ ≥ 5.8 GHz).
The HMC611LP4(E) can also be used in the controller
mode where an external voltage is applied to the VSET
pin, to create an AGC or APC feedback loop.
General Description
HMC611LP4 / 611LP4E
Features
Functional Diagram
Wide Dynamic Range: Up to 63 dB
High Accuracy: ±1 dB with 54 dB Range Up to 8 GHz
Supply Voltage: +5V
Excellent Stability over Temperature
Buffered Temperature Sensor Output
24 Lead 4x4mm SMT Package: 16mm
Typical Applications
The HMC611LP4(E) is ideal for IF and RF applica-
tions in:
• Cellular/PCS/3G
• WiMAX, WiBro, WLAN, Fixed Wireless & Radar
• Power Monitoring & Control Circuitry
• Receiver Signal Strength Indication (RSSI)
• Automatic Gain & Power Control
Electrical Speci cations, TA = +25C[1]
Parameter Typ. Typ. Typ. Typ. Typ. Units
Input Frequency 1 - 3600 5800 7000 8000 10000 MHz
±3 dB Dynamic Range 70 66 62 59 50 dB
±3 dB Dynamic Range Center -25 -23 -21 -20 -15 dBm
±1 dB Dynamic Range 60 61 58 52 42 dB
Output Intercept 18 25 23 22 21 dBm
Output Slope -25 -24 -26 -28 -32 mV/dB
Temperature Sensitivity @ -10 dBm Input [2] 7582028mdB/°C
[1] Detector mode measurements; LOGOUT (Pin 15) is shorted to VSET (Pin 16).
[2] Measured from TA = -40°C to TA = +85°C
60 dB, LOGARITHMIC
DETECTOR / CONTROLLER, 1 - 10000 MHz
v04.0309