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MAX2634：315MHz/433MHz Low-Noise Amplifier for Automotive RKE

Ultra-Low-Current Low-Noise Amplifier for RKE Solutions with Low-Noise Figure and Shutdown Mode

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 consuming 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. The device is available in a small 6-pin (2.0mm x 2.2mm x 0.9mm) lead-free SC70 package for automotive applications that require visual inspection of PCB solder connections.

Key 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 ±2.0kV (HBM) on All Pins AEC-Q100 Qualification

MAX2634: Functional Diagram/Typical Operating Circuit Applications/Uses Garage Door Openers Remote Keyless Entry (RKE) Security Telemetry Receivers Tire Pressure Monitoring Systems (TPMS)

DataSheet

Parametrics

Quality and Environmental Data

• MAX2634.pdf

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