MAX1473ETJ+

The MAX1473ETJ+ from Maxim Integrated Products is a 315MHz/433MHz ASK superheterodyne receiver with extended dynamic range in 32 pin TQFN package. This fully integrated low power CMOS receiver is ideal for receiving ASK data in the 300 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 automotive and consumer markets. The chip consists of a low noise amplifier LNA, a fully differential image rejection mixer, an on-chip phase locked loop with integrated voltage controlled oscillator, a 10.7MHz IF limiting amplifier stage with received signal strength indicator and analogue baseband data recovery circuitry. It is used in automotive remote keyless entry, garage door openers, remote controls, wireless sensors, security systems, local telemetry system and home automation.

• Operates from single 3.3V or 5.0V supplies, operating temperature range from -40°C to 85°C
• Discrete one step automatic gain control drops LNA gain by 35dB when RF input signal is > -57dBm
• Receiver input frequency range from 300MHz to 450MHz
• High dynamic range with on-chip AGC, selectable image rejection centre frequency
• Selectable x64 or x32 fLO/fXTAL ratio
• Low 5.2mA operating supply current
• Low current power down mode for efficient power cycling < 2.5µA
• 250µs start-up time, built-in 50dB RF image rejection
• Receive sensitivity of -114dBm
• Maximum bandwidth of 100KHz