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MAX7042：308MHz/315MHz/418MHz/433.92MHz Low-Power, FSK Superheterodyne Receiver

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.

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

MAX7042: Typical Application Circuit 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)

DataSheet

Parametrics

Design kits & evaluation modules

• MAX7042EVKIT

Quality and Environmental Data

• MAX7042.pdf

Related Products

• MAX1479：300MHz to 450MHz Low-Power, Crystal-Based +10dBm ASK/FSK Transmitter

Ordering Information