Data brief

For further information contact your local STMicroelectronics sales office.

December 2009

Doc ID 16884 Rev 1

1/5

5

STA370BWS

2.1-channel 40-W high-efficiency digital audio system

Sound Terminal™

Features

Wide-range supply voltage, 7.0 V to 21.5 V

Three power output configurations:

– 2 channels of ternary PWM

(2 x 20 W into 8

Ω at 18 V) + PWM output

– 2 channels of ternary PWM

(2 x 20 W into 8

Ω at 18 V) + ternary stereo

line-out

– 2.1 channels of binary PWM (left, right,

LFE) (2 x 9 W into 4

Ω + 1 x 20 W into 8 Ω

at 18 V)

Load-driving capabilities:

– 11 W into 6

Ω at 14 V, ternary

– 20 W into 4

Ω at 14 V, ternary

FFX with 100-dB SNR and dynamic range

Scalable FFX modulation index (up to 100%)

Selectable 32- to 192-kHz input sample rates

Digital gain/attenuation +48 dB to -80 dB with

step resolution:

– 0.125 dB/step from -60 dB to +48 dB

– 0.25 dB/step from -80 dB to -60 dB

Soft volume update with programmable ratio

Individual channel and master gain/attenuation

and soft/hard mute.

Two independent DRCs configurable as a

independent limiters/compressors with

optional global DRC capability

EQ-DRC for DRC based on filtered signals

Dedicated LFE processing for bass boosting

with 0.125-dB/step resolution

Audio presets:

– 15 preset crossover filters

– 5 preset anti-clipping modes

– Preset night-time listening mode

Input and output channel mapping

Programmable zero-detect mute

Automatic invalid input-detect mute

Up to 8 user-programmable biquads/channel

Three coefficients banks for EQ presets storing

Extended filter dynamics +4/-4 for better sound

shaping and easier filter implementation

Bass/treble tones and de-emphasis control

Selectable high-pass filter for DC blocking

Advanced AM interference frequency

switching and noise suppression modes

F3X™ advanced PWM modulation scheme for

carrier suppression (headphone or line output)

Selectable high- or low-bandwidth

noise-shaping topologies

96-kHz internal processing sample rate with

quantization error noise shaping for very low

cut-off frequency filters

Full short-circuit protection at device power-up

Coefficient checksum with software reset

capabilities

Table 1.

Device summary

Order code

Package

Packing

STA370BWS

PowerSSO-36 EPD

Tube

STA370BWSTR PowerSSO-36 EPD

Tape and reel

PowerSSO-36

with exposed pad down (EPD)

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