STA381BWS_V01中文资料意法半导体数据手册PDF规格书

特性 Features

 Wide-range supply voltage

– 4.5 V to 25.5 V (operating range)

– 27 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  ternary modulation

– 2 x 9 W into 4 + 1 x 20 W into 8 

 FFXTM 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 F3XTM analog output

 New fully programmable noise-gating function

 Headphone

– Embedded negative charge pump

– Full capless output configuration

– Driving load capabilities: 40 mW into 32 

 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

 STSpeakerSafeTM protection circuitry

– Pre- and post-processing DC blocking

filters

– Checksum engine for filter coefficients

– PWM fault self-diagnosis

 STCompressorTM dual-band DRC