2N5484 N-Channel Junction Field-Effect Transistor (JFET)

Overview

The 2N5484 is a high-performance N-channel junction field-effect transistor (JFET) designed for low-noise amplification and switching applications. This symmetrical JFET offers excellent electrical characteristics, including low noise figure and high input impedance, making it ideal for sensitive signal processing circuits. The device features interchangeable drain and source terminals, providing flexibility in circuit design.

Manufactured using silicon technology, the 2N5484 provides reliable performance across a wide range of operating conditions. Its symmetrical construction allows for bidirectional operation in certain applications, while its low noise characteristics make it particularly suitable for audio and RF applications.

Features

• N-channel symmetrical construction
• Low noise figure for sensitive applications
• Interchangeable drain and source terminals
• High input impedance
• Excellent linearity characteristics
• Low leakage current
• Wide operating voltage range
• Stable performance over temperature variations
• RoHS compliant (lead-free option available)

Applications

The 2N5484 JFET finds use in a variety of electronic circuits where its combination of low noise and high input impedance are particularly valuable:

• Audio Applications

  • Microphone preamplifiers
  • Phono preamps
  • High-fidelity audio amplifiers
  • Professional audio mixing consoles

• RF and Communication Systems

  • RF amplifiers
  • Oscillator circuits
  • Mixers and modulators
  • Receiver front-end circuits

• Test and Measurement Equipment

  • Low-noise instrumentation amplifiers
  • Signal conditioning circuits
  • Sensor interfaces
  • Precision measurement systems

• General Purpose Switching

  • Analog switches
  • Sample-and-hold circuits
  • Signal routing applications

Electrical Characteristics

The following table summarizes the key electrical specifications of the 2N5484 JFET under typical operating conditions (TA = 25°C unless otherwise specified):

Absolute Maximum Ratings

• Drain-Source Voltage (V_DS): 25V
• Gate-Source Voltage (V_GS): 25V
• Gate Current (I_G): 10mA
• Total Device Dissipation (P_D): 300mW
• Operating Junction Temperature Range: -55°C to +150°C
• Storage Temperature Range: -55°C to +150°C

Typical Electrical Characteristics

• Zero-Gate-Voltage Drain Current (I_DSS): 2-10mA (V_DS = 15V, V_GS = 0V)
• Gate-Source Cutoff Voltage (V_GS(off)): -0.5V to -4V (V_DS = 15V, I_D = 10nA)
• Forward Transconductance (g_fs): 3000-8000μS (V_DS = 15V, I_D = 1mA, f = 1kHz)
• Input Capacitance (C_iss): 4pF (V_DS = 15V, V_GS = 0V, f = 1MHz)
• Output Capacitance (C_oss): 2pF (V_DS = 15V, V_GS = 0V, f = 1MHz)
• Reverse Transfer Capacitance (C_rss): 1.5pF (V_DS = 15V, V_GS = 0V, f = 1MHz)
• Noise Figure (NF): 1dB typical (V_DS = 15V, I_D = 1mA, f = 1kHz, R_G = 1MΩ)

Package Information

The 2N5484 is available in several industry-standard packages to accommodate different application requirements:

TO-92 Package

• Package Type: Molded plastic, through-hole
• Termination: Leaded
• Pin Configuration:
  • Pin 1: Drain
  • Pin 2: Gate
  • Pin 3: Source
• Dimensions: 4.7mm (L) x 3.7mm (W) x 4.7mm (H)
• Weight: Approximately 0.13g
• Moisture Sensitivity Level (MSL): MSL 1

SOT-23 Surface Mount Package

• Package Type: Plastic, surface mount
• Termination: Gull-wing leads
• Pin Configuration:
  • Pin 1: Gate
  • Pin 2: Source
  • Pin 3: Drain
• Dimensions: 2.9mm x 1.3mm x 0.95mm
• Weight: Approximately 0.008g
• Moisture Sensitivity Level (MSL): MSL 1

Thermal Characteristics

• Thermal Resistance, Junction-to-Ambient (R_θJA): 200°C/W (TO-92 package)
• Thermal Resistance, Junction-to-Case (R_θJC): 83.3°C/W (TO-92 package)
• Maximum Power Derating: 2.4mW/°C above 25°C

Reliability and Qualification

The 2N5484 meets or exceeds the following reliability standards:

• JEDEC JESD22-A104 Temperature Cycling
• JEDEC JESD22-A101 Steady-State Temperature Humidity Bias Life Test
• JEDEC JESD22-A105 High Temperature Storage Life
• MIL-STD-750 Method 1036 Moisture Resistance
• ESD Rating: Human Body Model (HBM) Class 1 (>1000V)

Handling and Storage Recommendations

• Store in dry, non-corrosive environment
• Maintain temperature between -55°C and +150°C
• Use appropriate ESD precautions during handling
• Avoid mechanical stress on leads during assembly
• Follow standard soldering profiles for leaded or surface mount packages

Ordering Information

The 2N5484 is available in various packaging options:

• 2N5484: Single unit in bulk packaging
• 2N5484-TA: Tape and reel packaging (SOT-23 only)
• 2N5484-AP: Ammo pack packaging (TO-92 only)
• Contact factory for custom packaging or quantity requirements