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STA381BWS Datasheet, PDF (1/171 Pages) STMicroelectronics – Sound Terminal® 2.1-channel high-efficiency digital audio system | |||
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STA381BWS
Sound Terminal®
2.1-channel high-efficiency digital audio system
Datasheet â production data
Features
â Wide-range supply voltage
â 4.5 V to 25.5 V (operating range)
â 27 V (absolute maximum rating)
â I2C control with selectable device address
â Embedded full IC protection
â Manufacturing short-circuit protection (out
vs. gnd, out vs. vcc, out vs. out)
â Thermal protection
â Overcurrent protection
â Undervoltage protection
â 1 Vrms stereo analog input
â I2S interface, sampling rate 32 kHz ~ 192 kHz,
with internal sampling frequency converter for
fixed processing frequency
â Three output power stage configurations
â 2.0 mode, L/R full bridges
â 2.1 mode, L/R two half-bridges, subwoofer
full bridge
â 2.1 mode, L/R full bridges, PWM output for
external subwoofer amplifier
â Driving load capabilities
â 2 x 20 W into 8 Ω ternary modulation
â 2 x 9 W into 4 Ω + 1 x 20 W into 8 Ω
â FFXTM 100 dB dynamic range
â Fixed output PWM frequency at any input
sampling frequency
â Embedded RMS meter for measuring real-time
loudness
â Two analog outputs
â Selectable headphone / line out driver with
adjustable gain via external resistors
â New F3XTM analog output
â New fully programmable noise-gating function
VQFN48 (7 x 7 mm)
â Headphone
â Embedded negative charge pump
â Full capless output configuration
â Driving load capabilities: 40 mW into 32 Ω
â Line out
â 2 Vrms line output capability
â Up to 12 user-programmable biquads with
noise-shaping technology
â Direct access to coefficients through I2C
shadowing mechanism
â Fixed (88.2 kHz / 96 kHz) internal processing
sampling rate
â Two independent DRCs configurable as a
dual-band anticlipper or independent
limiters/compressors (B2DRC)
â Digital gain/att +48 dB to -80 dB with
0.125 dB/step resolution
â Independent (fade-in, fade-out) soft volume
update with programmable rate 48 ~ 1.5 dB/ms
â Bass/treble tones control
â Audio presets: 15 crossover filters,
5 anticlipping modes, nighttime listening mode
â STSpeakerSafeTM protection circuitry
â Pre- and post-processing DC blocking filters
â Checksum engine for filter coefficients
â PWM fault self-diagnosis
â STCompressorTM dual-band DRC
Table 1. Device summary
Order code
Package
STA381BWS
VQFN48
STA381BWSTR
VQFN48
Packing
Tray
Tape and Reel
July 2012
This is information on a product in full production.
Doc ID 018937 Rev 6
1/171
www.st.com
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