Professional IC Distribution & Technical Solutions

The BA1404 is a stereo FM transmitter IC manufactured by ROHM Semiconductor. Below are its key specifications, descriptions, and features:

Specifications:

• Manufacturer: ROHM
• Type: Stereo FM Transmitter IC
• Operating Voltage: 1.5V to 3V
• Frequency Range: 75MHz to 108MHz
• Modulation Type: FM (Frequency Modulation)
• RF Output Power: Low power (suitable for short-range transmission)
• Oscillation Type: PLL (Phase-Locked Loop)
• Stereo Separation: ~40dB (typical)
• THD (Total Harmonic Distortion): ~0.3% (typical)
• Package Type: SOP16 (Small Outline Package, 16-pin)

Descriptions:

• The BA1404 is a monolithic IC designed for stereo FM broadcasting applications.
• It integrates an FM modulator, stereo encoder, and RF amplifier in a single chip.
• It is commonly used in small FM transmitters for personal audio broadcasting (e.g., car adapters, wireless microphones).

Features:

• Built-in Stereo Modulator: Supports L+R (mono) and L-R (stereo) signals.
• Low Voltage Operation: Works efficiently at 1.5V to 3V, making it suitable for battery-powered devices.
• PLL-Based Oscillator: Ensures stable frequency transmission.
• Low Power Consumption: Ideal for portable applications.
• Integrated RF Amplifier: Simplifies circuit design by reducing external components.
• Adjustable Frequency: Allows tuning within the FM band (75MHz–108MHz).

This IC is widely used in DIY FM transmitters and low-power broadcasting applications. For detailed application circuits, refer to ROHM’s official datasheet.