315MHz Low-Power, +3V Superheterodyne Receiver

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 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.

FAQs: MAX1470

Applications

* Garage Door Openers

* Medical Systems

* Remote Controls

* Remote Keyless Entry (RKE)

* Security Systems

* Toys

* Video Game Controllers

* Wireless Computer Peripherals

* Wireless Sensors

* 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