Nisshinbo Micro Devices NT1819

The NT1819 is an Absorptive High Isolation SPDT Switch, engineered to meet the demands of modern 5G cellular infrastructure and other wireless communication applications, offering superior isolation and low insertion loss across a wide frequency range. 5G base stations have many antennas, an SPDT switch allows selecting between two antennas or different signal paths. The "absorptive" aspect of the switch means that when a port is not being used, it is terminated into a load (usually 50 ohms). This prevents the reflection of RF signals back into the system, which can cause interference or signal degradation. The NT1819 provides high isolation between RF terminals of 60 dB at 3.85 GHz and 50 dB at 7.125 GHz. This feature is crucial for next-generation communication networks, where interference must be minimized to maintain signal integrity. The switch operates over a wide frequency range from 0.2 to 7.125 GHz, supporting flexibility in design and deployment for various wireless standards. The NT1819 operates at 3.3 V with a typical current consumption of just 200 µA making it power-efficient. It is also resilience in harsh operating environments in a broad temperature range from -40 °C to +105 °C. With its small 3.0 × 3.0 mm QFN3030-16-NA package, designed to save space on PCBs, making it ideal for base transceiver stations in small and macro cell environments, as well as other advanced wireless communication systems. The device has an MSL1 rating, components in this category have the lowest sensitivity to moisture and can typically be exposed to ambient air without special precautions.

Key features

• Operation voltage: 3.3 V Typ. (2.5 to 5.0 V)
• Low control voltage: 1.8 V Typ.
• Low insertion loss: 0.70/0.80/0.85/0.90/1.2 dB Typ. @ 0.7/3.85/4.7/6.0/7.125 GHz
• High isolation: 70/62/60/55/51 dB Typ. @ 0.7/3.85/4.7/6.0/7.125 GHz, PC-P1/P2, 70/61/60/58/55 dB Typ. @ 0.7/3.85/4.7/6.0/7.125 GHz, P1-P2
• High linearity: P-0.1dB = +31 dBm Typ.
• Switching time: 250 ns Typ.
• Frequency range: 0.2 to 7.125 GHz
• Operation current: 200 µA Typ.
• Package NT1819NA: QFN3030-16-NA

Applications

• Cellular base transceiver station (small/macro cell, etc.)
• Wireless communication applications