The MAX1470 is a fully integrated low-power CMOS superheterodyne receiver for use with amplitude-shift-keyed (ASK) data in the 315MHz band. With few required external components, and a low-current power-down mode, it is ideal for cost- and power-sensitive applications in the automotive and consumer markets. The chip consists of a 315MHz low-noise amplifier (LNA), an image rejection mixer, a fully integrated 315MHz phase-lock-loop (PLL), a 10.7MHz IF limiting amplifier stage with received-signal-strength indicator (RSSI) and an ASK demodulator, and analog baseband data-recovery circuitry.
The MAX1470 is available in a 28-pin TSSOP package.
Key Features
Applications/Uses
Operates from a Single +3.0V to +3.6V Supply
Built-In 53dB RF Image Rejection
-115dBm Receive Sensitivity*
250µs Startup Time
Low 5.5mA Operating Supply Current
1.25µA Low-Current Power-Down Mode for Efficient Power Cycling
250MHz to 500MHz Operating Band (Image Rejection Optimized at 315MHz)
Integrated PLL with On-Board Voltage-Controlled Oscillator (VCO) and Loop Filter
Selectable IF Bandwidth Through External Filter
Complete Receive System from RF to Digital Data Out
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