For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
POWER DETECTORS - SMT
1
HMC948LP3E
v02.0913
54 dB, LOGARITHMIC
DETECTOR, 1 - 23 GHz
The HMC948LP3E Logarithmic Detector converts
RF signals at its input, to a proportional DC voltage
at its output. The HMC948LP3E employs successive
compression topology which delivers high dynamic
range over a wide input frequency range. As the input
power is increased, successive ampliers move into
saturation one by one creating an approximation of
the logarithm function. The output of a series of square
law detectors is summed, converted into the voltage
domain and buffered to drive the LOG OUT output.
The HMC948LP3E provides a nominal logarithmic
slope of +14.2 mV/dB and an intercept of -111 dBm at
23 GHz. Ideal as a log detector for high volume micro-
wave radio and VSAT applications, the HMC948LP3E
is housed in a compact 3x3 mm RoHS compliant SMT
plastic package.
General Description
Features
Functional Diagram
Wide Input Bandwidth: 1 to 23 GHz
Wide Dynamic Range: 54 dB up to 23 GHz
Single Positive Supply: +3.3V
Excellent Stability Over Temperature
Fast Rise / Fall Time: 5 / 7 ns
16 Lead 3x3 mm SMT Package: 9 mm²
Typical Applications
The HMC948LP3E is ideal for:
• Point-to-Point Microwave Radio
• VSAT
• Wideband Power Monitoring
• Receiver Signal Strength Indication (RSSI)
• Test & Measurement
Electrical Specications, TA = +25 C Vcc = +3.3V
Parameter Typ. Typ. Typ. Ty p. Typ. Typ. Typ. Units
Input Frequency[1] 1 5 10 14 18 20 23 GHz
±3 dB Dynamic Range 53 54 54 55 55 55 55 dB
±3 dB Dynamic Range Center -23 -25 -24 -22 -20 -15 -15 dBm
Log Error Over Temperature (-40 to +85) ±1 ±1 ±1 ±1.5 ±1.5 ±1.5 ±1.5 dB
Output Intercept -104 -107 -109 -112 -113 -108 -111 dBm
Output Slope 16.8 16.7 15.9 15.2 14.6 14.4 14.2 mV/dB
[1] Video output load should be 1K Ohm or higher.