This is information on the STA381BW Sound Terminal® 2.1-channel high-efficiency digital audio system. It features a wide-range supply voltage, I2C control, embedded full IC protection, 1 Vrms stereo analog input, I2S interface, three output power stage configurations, FFXTM 100 dB dynamic range, fixed output PWM frequency, embedded RMS meter, and a new fully programmable noise-gating function.
The STA381BW is a 2.1-channel high-efficiency digital audio system designed by STMicroelectronics. It features a wide supply voltage range of 4.5 V to 26 V and includes embedded full IC protection against manufacturing short-circuits, thermal issues, overcurrent, and undervoltage conditions.
The device supports three output power stage configurations: 2.0 mode with L/R full bridges, 2.1 mode with L/R half-bridges and a subwoofer full bridge, or 2.1 mode with PWM output for an external amplifier. It offers driving load capabilities of up to 2x20 W into 8 Ω in ternary modulation mode.
| Supply voltage (operating) | 4.5 V to 26 V |
|---|---|
| Absolute maximum rating | 30 V |
| Analog input level | 1 Vrms stereo |
| Sampling rate range | 32 kHz ~ 192 kHz |
| Output power (ternary modulation) | 2x20 W into 8 Ω |
| Output power (half-bridge mode) | 2x9 W into 4 Ω + 1x 20 W into 8 Ω |
| Dynamic range | 100 dB |
| Package type | VQFN48 (7 x 7 mm) |
The device operates with a wide-range supply voltage from 4.5 V to 26 V.
It supports 2.0 mode with L/R full bridges, or 2.1 modes using half-bridges for main channels and a full bridge for subwoofer, or PWM output.
The device supports a serial audio input interface with a sampling rate up to 192 kHz.