Impedance Matching And Protection IC Simplifies GNSS Receivers

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The integrated device replaces a matching network containing many electronic components in a much smaller footprint

Simplifying design by integrating impedance-matching and electrostatic-discharge (ESD) circuitry protection in a compact format is the new BPF8089-01SC6 RF front-end for Global Navigation Satellite System (GNSS) applications such as portable satellite receivers for GPS, Galileo, GLONASS, BeiDou and QZSS constellations. It may also be used in several consumer satellite navigation, radio base station, drone and asset/livestock tracking systems.

The BPF8089-01SC6 provides a 50Ω matched interface between the receiver’s antenna and low-noise amplifier (LNA). This compact, integrated device typically replaces a matching network containing up to five capacitors, resistors and inductors, as well as two discrete protection devices, resulting in a much smaller footprint. Designers can also leverage PCB-track specifications (provided in the device datasheet) to ease design challenges and ensure optimal performance.

The ESD protection complies with IEC 61000-4-2 (C = 150pF, R = 330Ω) and exceeds level 4: 8kV for contact discharge and 15kV for air discharge. The device also withstands 2kV pulse voltage in accordance with MIL STD 883C (C = 100pF, R = 1.5kΩ).

The BPF8089-01SC6 is housed in a SOT23-6L package (compatible with automatic optical inspection) and part of ST’s Application Specific Integrated Passives (ASIP) product range. The device is in production now and available from STMicroelectronics.