Overview
The BF909A,215 is an RF MOSFET transistor manufactured by NXP USA Inc. This device is specifically designed for high-frequency applications, particularly in the VHF and UHF ranges. It is an N-channel dual gate MOSFET, known for its high forward transfer admittance and superior cross-modulation performance during Automatic Gain Control (AGC). The BF909A,215 is packaged in a SOT143 or SOT143B case, making it suitable for surface-mount applications.
Key Specifications
| Parameter | Conditions | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|
| VDS (Drain-Source Voltage) | 7 | V | |||
| ID (Drain Current) | 40 | mA | |||
| Ptot (Total Power Dissipation) | 200 | mW | |||
| Tj (Operating Junction Temperature) | 150 | °C | |||
| yfs (Forward Transfer Admittance) | 36 | 43 | 50 | mS | |
| Cig1-s (Input Capacitance at Gate 1) | 3.6 | 4.3 | pF | ||
| Crs (Reverse Transfer Capacitance) | f = 1 MHz | 35 | 50 | fF | |
| Noise Figure | f = 800 MHz | 2 | 2.8 | dB |
Key Features
- High Forward Transfer Admittance: The BF909A,215 has a high forward transfer admittance, which is crucial for its performance in high-frequency applications.
- Superior Cross-Modulation Performance: It ensures good cross-modulation performance during AGC, making it suitable for applications requiring stable gain control.
- Low Noise Gain Controlled Amplifier: The device operates as a low noise gain controlled amplifier up to 1 GHz, enhancing its utility in RF circuits.
- Dual Gate Configuration: The N-channel dual gate configuration allows for precise control over the device's operation, especially in applications requiring AGC.
- Surface Mountable: Packaged in SOT143 or SOT143B, it is designed for surface-mount applications, facilitating easy integration into modern PCB designs.
Applications
The BF909A,215 is particularly suited for VHF and UHF applications, including:
- Television tuners
- Professional communications equipment
- Other high-frequency RF circuits where stable gain control and low noise are critical.
Q & A
- What is the maximum drain-source voltage for the BF909A,215?
The maximum drain-source voltage is 7V.
- What is the typical forward transfer admittance of the BF909A,215?
The typical forward transfer admittance is 43 mS.
- What is the operating junction temperature range for the BF909A,215?
The operating junction temperature range is up to 150°C.
- What type of package is the BF909A,215 available in?
The BF909A,215 is available in SOT143 or SOT143B packages.
- What are the typical applications for the BF909A,215?
Typical applications include VHF and UHF circuits such as television tuners and professional communications equipment.
- What is the noise figure of the BF909A,215 at 800 MHz?
The noise figure at 800 MHz is between 2 dB and 2.8 dB.
- Is the BF909A,215 suitable for surface-mount applications?
- What is the maximum drain current for the BF909A,215?
The maximum drain current is 40 mA.
- What is the total power dissipation limit for the BF909A,215?
The total power dissipation limit is 200 mW.
- Does the BF909A,215 have an internal bias circuit?
