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

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

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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.
MAX2634: Functional Diagram/Typical Operating Circuit MAX2634: Functional Diagram/Typical Operating Circuit Enlarge+

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


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

See parametric specs for Low-Noise Amplifiers (42)

Part NumberRF Freq.
RF Freq.
Noise Figure
Input IP3
(mm x mm)
minmaxSee Notes
MAX2634 10010001.2515.5-16- x 2.2
$0.77 @1k

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

MAX2634EVKIT: Evaluation Kit for the MAX2634
Product Reliability Reports: MAX2634.pdf 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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