MAX7042

19-3704; Rev 1; 3/07 www.DataSheet4U.com 308MHz/315MHz/418MHz/433.92MHz Low-Power, FSK Superheterodyne Receiver General 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 lownoise amplifier (LNA), an image-rejection (IR) mixer, a fully integrated phase-locked loop (PLL), local oscillator (LO), 10.7MHz IF limiting amplifier with received-signalstrength 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 thin QFN and is specified over the automotive -40°C to +125°C temperature range. 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 Thin QFN 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 De...