315MHz/433MHz ASK Superheterodyne Receiver with AGC Lock

300MHz to 450MHz Superheterodyne Receiver with Integrated Image Rejection Operates Up to +105°C

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The MAX7033 fully integrated low-power CMOS super-heterodyne receiver is ideal for receiving amplitude shift-keyed (ASK) data in the 300MHz to 450MHz frequency range. The receiver has an RF input signal range of -114dBm to 0dBm. With few external components and a low-current power-down mode, it is ideal for cost-sensitive and power-sensitive applications typical in consumer markets. The MAX7033 consists of a low-noise amplifier (LNA), a fully differential image-rejection mixer, an on-chip phase-locked loop (PLL) with integrated voltage-controlled oscillator (VCO), a 10.7MHz IF limiting amplifier stage with received-signal-strength indicator (RSSI), and analog baseband data-recovery circuitry. The MAX7033 also has a discrete one-step automatic gain control (AGC) that reduces the LNA gain by 35dB when the RF input signal exceeds -62dBm. The AGC circuitry offers an externally controlled hold feature.

The MAX7033 is available in 28-pin TSSOP and 32-pin TQFN packages and is specified over the extended (-40°C to +105°C) temperature range.

Key Features

  • Optimized for 315MHz or 433MHz Band
  • Operates from Single +3.3V or +5.0V Supplies
  • High Dynamic Range with On-Chip AGC
  • AGC Hold Circuit
  • 1ms AGC Release Time
  • Selectable Image-Rejection Center Frequency
  • Selectable x64 or x32 fLO/fXTAL Ratio
  • Low 5.2mA Operating Supply Current
  • < 3.5µA Low-Current Power-Down Mode for Efficient Power Cycling
  • 250µs Startup Time
  • Built-In 44dB RF Image Rejection
  • Better than -114dBm Receive Sensitivity
  • -40°C to +105°C Operation


  • Garage Door Openers
  • Home Automation
  • Local Telemetry
  • Remote Controls
  • Security Systems
  • Wireless Sensors

See parametric specs for ISM RF Receivers < 1GHz (7)

Part NumberBand/ Freq.
IF Output Frequency
Modulation ModeRX Sensitivity
Data Rate
maxSee Notes
MAX7033 300 to 45010.7
$1.77 @1k

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

MAX7033EVKIT: Evaluation Kit for the MAX7033
Request Reliability Report for: MAX7033 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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