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308MHz/315MHz/418MHz/433.92MHz Low-Power, FSK Superheterodyne Receiver

Product Details

Key Features

Applications/Uses

Parametric specs for ISM RF Receivers < 1GHz
Band/ Freq. (MHz) 300 to 450
IF Output Frequency (MHz) 10.7
Modulation Mode FSK
RX Sensitivity (dBm) -110
Data Rate (kbps) (max) 66
Package/Pins TQFN/32
Budgetary
Price (See Notes)
0
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Simplified Block Diagram

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Parameters

Parametric specs for ISM RF Receivers < 1GHz
Band/ Freq. (MHz) 300 to 450
IF Output Frequency (MHz) 10.7
Modulation Mode FSK
RX Sensitivity (dBm) -110
Data Rate (kbps) (max) 66
Package/Pins TQFN/32
Budgetary
Price (See Notes)
0

Key Features

  • +2.4V to +3.6V or +4.5V to +5.5V Single-Supply Operation
  • Four User-Selectable Carrier Frequencies 308, 315, 418, and 433.92MHz
  • -110dBm RF Input Sensitivity at 315MHz
  • -109dBm RF Input Sensitivity at 433.92MHz
  • Fast Startup (< 250µs)
  • Small 32-Pin TQFN Package
  • Low Operating Supply Current
    • 6.2mA Continuous
    • 20nA Power-Down
  • Integrated PLL, VCO, and Loop Filter
  • 45dB Integrated Image Rejection
  • Selectable IF BW with External Filter
  • Positive and Negative Peak Detectors
  • RSSI Output

Applications/Uses

  • Home and Office Lighting Control
  • Home Automation
  • Local Telemetry Systems
  • Remote Keyless Entry (RKE)
  • Remote Sensing
  • Security Systems
  • Smoke Alarms
  • Tire-Pressure Monitoring (TPM)

Description

The MAX7042 fully integrated, low-power, CMOS superheterodyne RF receiver is designed to receive frequency-shift-keyed (FSK) data at rates up to 66kbps nonreturn-to-zero (NRZ) (33kbps Manchester). The MAX7042 requires only a few external components to realize a complete wireless RF receiver at 308, 315, 418, and 433.92MHz.

The MAX7042 includes all the active components required in a superheterodyne receiver including a low-noise amplifier (LNA), an image-rejection (IR) mixer, a fully integrated phase-locked loop (PLL), local oscillator (LO), 10.7MHz IF limiting amplifier with received-signal-strength indicator (RSSI), low-noise FM demodulator, and a 3V regulator. Differential peak-detecting data demodulators are included for baseband data recovery.

The MAX7042 is available in a 32-pin TQFN and is specified over the automotive -40°C to +125°C temperature range.

Simplified Block Diagram

MAX7042: Typical Application Circuit MAX7042: 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 .