Datasheet | January 21, 2009

2.5 GHz 45 dB RF-Detecting Controllers (MAX4002EUA+)

Source: Digi-Key Corporation

The MAX4000/MAX4001/MAX4002 low-cost, low-power logarithmic amplifiers are designed to control RF power amplifiers (PA) operating in the 0.1GHz to 2.5GHz frequency range. A typical dynamic range of 45dB makes this family of log amps useful in a variety of wireless applications including cellular handset PA control, transmitter power measurement, and RSSI for terminal devices. Logarithmic amplifiers provide much wider measurement range and superior accuracy to controllers based on diode detectors. Excellent temperature stability is achieved over the full operating range of -40°C to +85°C.


  • Complete RF-Detecting PA Controllers
  • Variety of Input Ranges
    • MAX4000: -58dBV to -13dBV

    • (-45dBm to 0dBm in 50O)
    • MAX4001: -48dBV to -3dBV

    • (-35dBm to +10dBm in 50O)
    • MAX4002: -43dBV to +2dBV
      (-30dBm to +15dBm in 50O)
  • Frequency Range from 100MHz to 2.5GHz
  • Temperature Stable Linear-in-dB Response
  • Fast Response: 70ns 10dB Step
  • 10mA Output Sourcing Capability
  • Low Power: 17mW at 3V (typ)
  • Shutdown Current 30µA (max)
  • Available in an 8-Bump UCSP and a Small 8-Pin µMAX Package