MAX2634

19-4383; Rev 1; 3/09 KIT ATION EVALU E L B AVAILA 315MHz/433MHz Low-Noise Amplifier for Automotive RKE Features o Optimized for 308MHz, 315MHz, 418MHz, and 433.92MHz o 2.2V to 5.5V Supply Voltage Range o Low Operating Supply Current 2.5mA (typ), 4mA (max) o Logic-Controlled 1µA (max) Shutdown o Typical Performance at 315MHz 1.25dB Noise Figure -16dBm Input IP3 15.5dB Power Gain o Automotive Temperature Range -40°C to +125°C o ESD Rating of ±2.5kV (HBM) on All Pins o AEC-Q100 Qualification 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 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 DCblocking 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. MAX2634 Applications Remote Keyless Entry (RKE) Tire Pressure Monitoring Systems...