General Description
The MAX2634 low-noise amplifier (LNA) with low-power shutdown mode is optimized for 315MHz and 433.92MHz automotive remote keyless entry (RKE) applications. At 315MHz, the LNA achieves 15.5dB power gain and a 1.25dB noise figure while only con suming 2.5mA of supply current from a 2.2V to 5.5V power supply. An integrated logic-controlled low-power shutdown mode reduces power consumption to 0.1µA and replaces the two transistors typically required to implement the shutdown function in discrete-based RKE LNA solutions. The device further reduces component count by integrating the output matching and DC blocking components, and only requires a single inductor to match the input for best noise figure and input return loss

FEATUREs
♦ Optimized for 308MHz, 315MHz, 418MHz,
and 433.92MHz
♦ 2.2V to 5.5V Supply Voltage Range
♦ Low Operating Supply Current
2.5mA (typ), 4mA (max)
♦ Logic-Controlled 1µA (max) Shutdown
♦ Typical Performance at 315MHz
    1.25dB Noise Figure
    -16dBm Input IP3
    15.5dB Power Gain
♦ Automotive Temperature Range -40°C to +125°C
♦ ESD Rating of ±2.5kV (HBM) on All Pins
♦ AEC-Q100 Qualification

APPLICATIONs
Remote Keyless Entry (RKE)
Tire Pressure Monitoring Systems (TPMS)
Security
Garage Door Openers
Telemetry Receivers