sta381bw STMicroelectronics, sta381bw Datasheet
sta381bw
Manufacturer Part Number
sta381bw
Description
Sound Terminal 2.1-channel High-efficiency Digital Audio System
Manufacturer
STMicroelectronics
Datasheet
1.STA381BW.pdf
(168 pages)
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Part Number
Manufacturer
Quantity
Price
Part Number:
STA381BW
Manufacturer:
ST
Quantity:
20 000
Part Number:
sta381bwS
Manufacturer:
ST
Quantity:
20 000
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Features
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June 2011
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to
change without notice.
Wide-range supply voltage
– 4.5 V to 26 V (operating range)
– 30 V (absolute maximum rating)
I
Full IC protection embedding:
– Manufacturing short-circuit protection (out
– Thermal protection
– Overcurrent protection
– Undervoltage protection
1 Vrms stereo analog input
I
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
– 2.1 mode, L/R full bridges, PWM output for
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
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
– Auxiliary F3X
2
2
C control with selectable device address
S interface, sampling rate 32 kHz ~ 192 kHz,
vs. gnd, out vs. vcc, out vs. out)
full bridge
external subwoofer amplifier
adjustable gain via external resistors
driver
TM
100 dB dynamic range
TM
analog output for external
2.1-channel high-efficiency digital audio system
Doc ID 018835 Rev 2
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Table 1.
STA381BWTR
Order code
STA381BW
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 I
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 (B
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
– Pre and post processing DC blocking filters
– Checksum engine for filter coefficients
– PWM fault self-diagnosis
STCompressor
Device summary
VQFN48 (7 x 7 mm)
TM
TM
Package
VQFN48
VQFN48
dual-band DRC
protection circuitry:
Sound Terminal
STA381BW
2
DRC)
Tape and Reel
Preliminary data
Packing
Tray
2
www.st.com
C
1/168
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