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100MHz to 2500MHz, 45dB RF Detector in a UCSP

Industry's Smallest Quad-Band, 2.5GHz, 45dB RF Power Amplifier Detector Saves 80% Board Space

Product Details

Key Features

Parametric specs for RF Power Detectors
Detector Type Log. Amp.
Dynamic Range (dB) 45
VCC (V) 2.7 to 5.5
ISUPPLY (mA) 5.9
RF Freq. (MHz) (min) 100
RF Freq. (MHz) (max) 2500
PRF (dBm) (50Ω Term) -45 to 0
Footprint (mm x mm) 3.0 x 3.5
Oper. Temp. (°C) -40 to +85
Package/Pins UMAX/8
Budgetary
Price (See Notes)
1.28
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Simplified Block Diagram

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Parameters

Parametric specs for RF Power Detectors
Detector Type Log. Amp.
Dynamic Range (dB) 45
VCC (V) 2.7 to 5.5
ISUPPLY (mA) 5.9
RF Freq. (MHz) (min) 100
RF Freq. (MHz) (max) 2500
PRF (dBm) (50Ω Term) -45 to 0
Footprint (mm x mm) 3.0 x 3.5
Oper. Temp. (°C) -40 to +85
Package/Pins UMAX/8
Budgetary
Price (See Notes)
1.28

Key Features

  • Complete RF Detector
  • Frequency Range from 100MHz to 2500MHz
  • Input Range of -58dBV to -13dBV (-45dBm to 0dBm into 50Ω )
  • Fast Response: 70ns in 10dB Steps
  • Low-Current Consumption: 5.9mA at VCC = 3.0V
  • 13µA (typ) Shutdown Current
  • Available in 8-Bump UCSP or 8-Pin µMAX and Thin QFN Packages

Applications/Uses

  • Cellular Handsets (TDMA, CDMA, GPRS, GSM)
  • RSSI for Fiber Modules
  • Transmitter Power Measurement and Control
  • TSSI for Wireless Terminal Devices

Description

The MAX4003 low-cost, low-power logarithmic amplifier is designed to detect the power levels of RF power amplifiers (PAs) operating from 100MHz to 2500MHz. A typical dynamic range of 45dB makes this logarithmic amplifier useful in a variety of wireless applications including cellular handset PA control, TSSI for wireless terminal devices, and other transmitter power measurements. This logarithmic amplifier provides much wider measurement range and superior accuracy than typical diode-based detectors. Excellent temperature stability is achieved over the full operating range of -40°C to +85°C.

The MAX4003 logarithmic amplifier is a voltage-measuring device with a typical signal range of -58dBV to -13dBV. The input signal is internally AC-coupled by an on-chip 5pF capacitor in series with a 2kΩ resistance. This highpass coupling, with a corner at 16MHz, sets the lowest operating frequency and allows the input signal source to be DC grounded. The MAX4003 also features a power-on delay, which holds the detector output (OUT) low for approximately 5µs to ensure glitchless controller output.

The MAX4003 is available in an 8-bump chip-scale package (UCSP™), an 8-pin µMAX® package, and an 8-pin thin QFN package. The device consumes 5.9mA with a 3.0V supply and only 13µA when the device is in shutdown.

Simplified Block Diagram

MAX4003: Typical Application Circuit MAX4003: Typical Application Circuit Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .