BA3121F-E2 Audio Amplifier Noise Reducer SOP-8

BA3121F-E2 Audio Amplifier Noise Reducer IC (SOP-8) eliminates hum and interference in audio circuits, delivering clean signal amplification for professional and consumer audio systems. Engineers and hobbyists integrate this IC into mixers, preamps, and car audio systems to suppress power supply noise and enhance sound clarity.

Key Features:

• Noise Suppression: Actively reduces power supply hum and interference in audio signals.
• Wide Voltage Range: Operates from 4.5 V to 16 V for flexible power supply compatibility.
• Low Distortion: Maintains high-fidelity audio output with minimal signal degradation.
• SOP-8 Package: Compact surface-mount design saves PCB space.
• Easy Integration: Works seamlessly with op-amps and audio amplifiers.

Technical Specifications:

• Operating Voltage: 4.5 V to 16 V DC
• Current Consumption: 3 mA (typical)
• Frequency Response: 20 Hz to 20 kHz (±1 dB)
• Noise Reduction: Up to 60 dB suppression at 100 Hz
• Temperature Range: –40 °C to +85 °C

Mechanical Specifications:

• Package Type: SOP-8 (Surface-Mount)
• Pin Material: Lead-free (RoHS compliant)
• Body Material: Epoxy resin with moisture protection

Dimensions:

• Package Size: 4.9 mm × 3.9 mm × 1.75 mm
• Lead Pitch: 1.27 mm
• Lead Width: 0.41 mm (typical)

Pinout and Wiring:

• Pin 1: VCC (Power Supply)
• Pin 2: Input (Audio Signal)
• Pin 3: Ground (GND)
• Pin 4: Bypass Capacitor Connection
• Pin 5-8: Output and Filter Control (Refer to Datasheet)
• Connect Pin 1 to a stable DC power source (4.5–16 V) and Pin 3 to ground for optimal noise reduction.

Datasheet Reference:

• Download the full BA3121F-E2 datasheet from the manufacturer’s website for detailed schematics, application circuits, and performance graphs.

Applications:

• Professional Audio Gear: Reduces noise in mixers, amplifiers, and studio equipment.
• Car Audio Systems: Suppresses alternator whine and ground loop interference.
• Home Theater: Enhances clarity in AV receivers and soundbars.
• Instrumentation: Cleans signals in measurement and recording devices.

Equivalent Models:

• NJM2904: Dual op-amp with noise reduction features (DIP-8).
• NE5532: Low-noise audio amplifier (requires external filtering).
• TL072: JFET-input op-amp for high-impedance audio circuits.

Package Includes:

• 1 x BA3121F-E2 Audio Amplifier Noise Reducer IC (SOP-8)