MAX7034

19-3109; Rev 0; 1/08 315MHz/434MHz ASK Superheterodyne Receiver www.datasheet4u.com General Description ♦ Operates from Single +5.0V Supply Features ♦ Optimized for 315MHz or 433.92MHz Band ♦ Selectable Image-Rejection Center Frequency ♦ Selectable x64 or x32 fLO/fXTAL Ratio ♦ Low (< 6.7mA) Operating Supply Current ♦ < 3.0µA Low-Current Power-Down Mode for Efficient Power Cycling ♦ 250µs Startup Time ♦ Built-In 44dB RF Image Rejection ♦ Excellent Receive Sensitivity Over Temperature ♦ -40°C to +125°C Operation MAX7034 The MAX7034 fully integrated low-power CMOS superheterodyne receiver is ideal for receiving amplitudeshift-keyed (ASK) data in the 300MHz to 450MHz frequency range (including the popular 315MHz and 433.92MHz frequencies). The receiver has an RF sensitivity of -114dBm. With few external components and a low-current power-down mode, it is ideal for cost-sensitive and power-sensitive applications typical in the automotive and consumer markets. The MAX7034 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 MAX7034 is available in a 28-pin TSSOP package and is specified over the automotive (-40°C to +125°C) temperature range. Ordering Information PART TEMP RANGE PINPACKAGE 28 TSSOP (9.7mm x 4.4mm) PKG CODE U2...