Key facts
- Brand
- STMicroelectronics
- Model
- STA381BW
- Category
- amplifier
- Documents
- 3
- Languages
- EN
- Last added
- 2012-08-08
Start here
STA381BW Sound Terminal Datasheet
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.
STMicroelectronics STA381BW specifications
| 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) |
All STMicroelectronics STA381BW documents by type
Ratings, dimensions and ordering codes, for selection and design work.
How to use the product for one specific task, with worked examples.
Questions answered in these manuals
What is the operating supply voltage range?
The device operates with a wide-range supply voltage from 4.5 V to 26 V.
What are the supported output power stage configurations?
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.
What are the three output power stage configurations available?
The device supports 2.0 mode with L/R full bridges, 2.1 mode with L/R two half-bridges and a subwoofer full bridge, or 2.1 mode with L/R full bridges and a PWM output for an external subwoofer amplifier.
From: STA381BWS Sound Terminal 2.1-channel high-efficiency digital audio system Datasheet
What is the dynamic range of the FFX technology?
The FFX™ technology provides a 100 dB dynamic range.
From: STA381BWS Sound Terminal 2.1-channel high-efficiency digital audio system Datasheet
What is the operating voltage range for the DC power supply?
The application note states that the DC power supply must have an operating range from 4.5 V to 25.5 V.
From: STMicroelectronics AN3959 STA381BW/STA381BWS Application Note
What are the dimensions or ratings for the output filter resistors?
The demonstration board uses two resistors with a value of 47 ohm each in the optional line/HP output path.
From: STMicroelectronics AN3959 STA381BW/STA381BWS Application Note