MAXIM MAX7033EUI+

The MAX7033 fully integrated low-power CMOS super­ heterodyne receiver is ideal for receiving amplitude shiftkeyed (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 ampli­ fier (LNA), a fully differential image-rejection mixer, an on-chip phase-locked loop (PLL) with integrated voltagecontrolled 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.

• 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

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