MAX1473EUI+

The MAX1473EUI+ is one member of the MAX1473 series.The MAX1473 fully integrated low-power CMOS superheterodyne receiver is ideal for receiving amplitudeshift-keyed (ASK) data in the 300MHz to 450MHz frequency range. Its signal range is from -114dBm to 0dBm. With few external components and a low-current power-down mode, it is ideal for cost- and power-sensitive applications typical in the automotive and consumer markets. The chip consists of a low-noise amplifier (LNA), a fully differential image-rejection mixer, an onchip 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.

Features of the MAX1473EUI+ are:(1)optimized for 315MHz or 433MHz ISM band; (2)operates from single 3.3V or 5.0V supplies; (3)high dynamic range with on-chip AGC; (4)selectable image-rejection center frequency; (5)selectable x64 or x32 fLO/fXTAL ratio; (6)low 5.2mA operating supply current; (7)<2.5A low-current power-down mode for efficient power cycling; (8)250s startup time; (9)built-in 50dB RF image rejection; (10)receive sensitivity of -114dBm.The MAX1473 also has a discrete one-step automatic gain control (AGC) that drops the LNA gain by 35dB when the RF input signal is greater than -57dBm.The MAX1473 is available in 28-pin TSSOP and 32-pin thin QFN packages. Both versions are specified for the extended (-40°C to +85°C) temperature range.

The absolute maximum ratings of the MAX1473EUI+ can be summarized as:(1)AVdd5 to AGND:-0.3V to +6.0V;(2)storage temperature range:-60 to +150;(3)operating temperature range:-40 to +85;(4)lead temperature range (soldering 10 sec):300;(5)LED forward current (DI, DE, ISO RO LED):50mA.Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device.These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.