The MAX2634 low-noise amplifier (LNA) 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.
The MAX2634 is a SiGe BiCMOS low‑noise amplifier optimized for 315 MHz and 433.92 MHz automotive remote keyless entry (RKE) applications. It delivers 15.5 dB power gain with a 1.25 dB noise figure while drawing only 2.5 mA typical supply current.
A logic‑controlled shutdown pin reduces power consumption to 0.1 µA, and the device integrates output matching and DC‑blocking components, requiring only a single inductor. It is supplied in a 6‑pin lead‑free SC70 package and operates over –40 °C to +125 °C, making it suitable for automotive environments.
| Typical Gain at 315 MHz | 15.5 dB |
|---|---|
| Noise Figure at 315 MHz | 1.25 dB |
| Typical Supply Current | 2.5 mA |
| Supply Voltage Range | 2.2 V to 5.5 V |
| Package Type | 6‑pin SC70 (2.0 mm × 2.2 mm × 0.9 mm) lead‑free |
| Operating Temperature Range | -40 °C to +125 °C |
| ESD Rating | ±2.5 kV (HBM) |
The MAX2634 provides a typical gain of 15.5 dB at 315 MHz.
It operates from 2.2 V up to 5.5 V supply voltage.
The device is offered in a 6‑pin lead‑free SC70 package.