STA382BW Datasheet, PDF (1/172 Pages) STMicroelectronics – Sound Terminal® 2.1-channel high-efficiency digital audio system

STA382BW
Sound Terminal^®
2.1-channel high-efficiency digital audio system
Datasheet − preliminary data
Features
■ Wide-range supply voltage
– 4.5 V to 26 V (operating range)
– 30 V (absolute maximum rating)
■ I²C control with selectable device address
■ Embedded full IC protection
– Manufacturing short-circuit protection (out
vs. gnd, out vs. vcc, out vs. out)
– Thermal protection
– Overcurrent protection
– Undervoltage protection
■ 1 Vrms stereo analog input
■ I²S interface, sampling rate 32 kHz ~ 192 kHz,
with internal sampling frequency converter for
fixed processing frequency
■ Three output power stage configurations
– 2.0 mode, L/R full bridges
– 2.1 mode, L/R two half-bridges, subwoofer
full bridge
– 2.1 mode, L/R full bridges, PWM output for
external subwoofer amplifier
■ Driving load capabilities
– 2 x 20 W into 8 Ω ternary modulation
– 2 x 9 W into 4 Ω + 1 x 20 W into 8 Ω
■ FFX^TM 100 dB dynamic range
■ Fixed output PWM frequency at any input
sampling frequency
■ Embedded RMS meter for measuring real-time
loudness
■ Two analog outputs
– Selectable headphone / line out driver with
adjustable gain via external resistors
– New F3X^TM analog output
■ New fully programmable noise-gating function
VQFN48 (7 x 7 mm)
■ Headphone
– Embedded negative charge pump
– Full capless output configuration
– Driving load capabilities: 40 mW into 32 Ω
■ Line out
– 2 Vrms line output capability
■ Up to 12 user-programmable biquads with
noise-shaping technology
■ Direct access to coefficients through I²C
shadowing mechanism
■ Fixed (88.2 kHz / 96 kHz) internal processing
sampling rate
■ Two independent DRCs configurable as a
dual-band anticlipper or independent
limiters/compressors (B²DRC)
■ Digital gain/att +48 dB to -80 dB with
0.125 dB/step resolution
■ Independent (fade-in, fade-out) soft volume
update with programmable rate 48 ~ 1.5 dB/ms
■ Bass/treble tones control
■ Audio presets: 15 crossover filters,
5 anticlipping modes, nighttime listening mode
■ STSpeakerSafe^TM protection circuitry
– Pre- and post-processing DC blocking
filters
– Checksum engine for filter coefficients
– PWM fault self-diagnosis
■ STCompressor^TM dual-band DRC
Table 1. Device summary
Order code
Package
STA382BW
VQFN48
STA382BWTR
VQFN48
Packing
Tray
Tape and Reel
April 2012
Doc ID 022783 Rev 1
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to
change without notice.
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