产品概述

STA326单片音频系统集成了数字音频处理器、数字放大控制器和一个DDX数字功率输出级。通过数字控制可以将其配置成不同的输出模式，提供各种音频处理和均衡选项，包括每通道4个可编程28位二阶滤波器，以及高低音控制器，各种听音条件预设模式可以缩短软件开发时间,简化产品设计过程。能够满足从2x1W到2x80W/2x40W + 1x80W
/1x160W的不同音频功率需求。

性能特点

Wide supply voltage range (10 V - 36 V)
Three power output configurations
– 2x40W + 1x80W
– 2x80W
– 1x160W
PowerSO-36 package (exposed pad up (EPU))
2.1 channels of 24-bit DDX®
100-dB SNR and dynamic range
32 kHz to 192 kHz input sample rates
Digital gain/attenuation +48 dB to -80 dB in
0.5-dB steps
Four 28-bit user-programmable biquads (EQ)
per channel
I2C control
2-channel I2S input data interface
Individual channel and master gain/attenuation
Individual channel and master soft/hard mute
Individual channel volume and EQ bypass
Bass/treble tone control
Dual independent programmable
limiters/compressors
Automodes
– 32 preset EQ curves
– 15 preset crossover settings
– Auto volume-controlled loudness
– 3 preset volume curves
– 2 preset anti-clipping modes
– Preset nighttime listening mode
– Preset TV AGC
Input and output channel mapping
AM noise-reduction and PWM
frequency-shifting modes
Software volume update and muting
Auto zero detect and invalid input detect
muting
Selectable DDX® ternary or binary PWM
output + variable PWM speeds
Selectable de-emphasis
Post-EQ user-programmable mix with default
2.1 bass-management settings
Variable max power correction for lower fullpower
THD
Four output routing configurations
Selectable clock input ratio
96 kHz internal processing sample rate, 24 to
28-bit precision
Video application supports 576 * fs input mode

管教排列

典型应用原理图