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