Description:Support is limited to customers who have already adopted these products.The HFA3046, HFA3096, HFA3127 and the HFA3128 are ultra high frequency transistor arrays that are fabricated from the Renesas complementary bipolar UHF-1 process. Each array consists of five dielectrically isolated transistors on a common monolithic substrate. The NPN transistors exhibit a fT of 8GHz while the PNP transistors provide a fT of 5. 5GHz. Both types exhibit low noise (3. 5dB), making them ideal for high frequency amplifier a
A 4-layer PCB with a solid ground plane and a separate power plane is recommended. Keep the analog and digital grounds separate and connect them at a single point. Use a decoupling capacitor (e.g., 100nF) close to the VCC pin.
Apply power to the VCC pin first, then to the AVCC pin. Ensure the power supply is stable and within the recommended voltage range (2.7V to 5.5V). Initialize the device by setting the RST pin low for at least 10ms, then release it to allow the device to start up.
The HFA3128RZ supports a maximum clock frequency of 16MHz. However, the actual clock frequency may be limited by the specific application and system requirements.
To minimize power consumption, set the clock frequency to the lowest required value, disable unused peripherals, and use the power-down mode (PD pin) when the device is not in use. Additionally, consider using the low-power modes (e.g., idle mode, sleep mode) provided by the device.
Use a TVS (Transient Voltage Suppressor) diode or a Zener diode with a voltage rating of 5.5V or higher to protect the device from electrostatic discharge (ESD). Ensure the ESD protection device is connected between the VCC pin and the GND pin.
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HFA3128RZ Overview
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