深圳市华兴微电子有限公司 （非本站正式会员）

Features

• 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 3x3mm SMT Package: 9mm2

Typical Applications

• Point-to-Point Microwave Radio
• VSAT
• Wideband Power Monitoring
• Receiver Signal Strength 
   Indication (RSSI)
• Test & Measurement

Functional Diagram

General Description

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 amplifiers 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 microwave radio and VSAT applications, the HMC948LP3E is housed in a compact 3x3 mm RoHS compliant SMT plastic package.