STA326 STMicroelectronics, STA326 Datasheet - Page 6

• Manufacturer Part Number: STA326
• Description: DIG AUDIO SYSTEM, 2-CH, 36POWERSSOP
• Manufacturer: STMicroelectronics

Specifications of STA326

• Svhc: No SVHC (15-Dec-2010)
• No. Of Pins: 36
• Operating Temperature Range: -20°C To +85°C
• Supply Voltage Max: 36V
• Supply Voltage Min: 10V
• Termination T: RoHS Compliant
• Package / Case: PowerSO
• Interface: I2C
• Interface Type: I2C
• Rohs Compliant: Yes

Description
1.1
1.2
6/57
EQ processing
Two channels of input data (re-sampled if necessary) at 96 kHz are provided to the EQ
processing block. In this block, up to four user-defined biquads can be applied to each of the
two channels.
Prescaling, DC-blocking, high-pass, de-emphasis, bass, and tone control filters can also be
applied based on various configuration parameter settings.
The entire EQ block can be bypassed for all channels simultaneously by setting the DSPB
bit to 1. And the CxEQBP bits can be used to bypass the EQ function on a per channel
basis.
Figure 3.
Output configurations
Figure 4.
Figure 3
Re-sampled
Input
Channel signal flow through the EQ block
Output power-stage configurations
Scale
Pre
shows the internal signal flow through the EQ block.
Bridge
Bridge
Bridge
Bridge
Bridge
Bridge
Bridge
Bridge
Bridge
Bridge
Bridge
Bridge
Bridge
Bridge
Bridge
Bridge
Half
Half
Half
Half
Half
Half
Half
Half
Half
Half
Half
Half
Half
Half
Half
Half
If HPB = 0
High-P ass
Filter
OUT1A
OUT1A
OUT2A
OUT2B
OUT1B
OUT2B
OUT1A
OUT1A
OUT1B
OUT1B
OUT2A
OUT2A
OUT2B
OUT2B
OUT1B
OUT2A
Doc ID 11531 Rev 3
BQ#1
BQ#2
4 Biquads
User defined if AMEQ = 00
Preset EQ if AMEQ = 01
Auto Loudness if AMEQ = 10
Channel 1
Channel 1
Channel 3
Channel 2
Channel 2
If DSPB = 0 & CxEQB = 0
Channel 2
Channel 1
Channel 3
BQ#3
2-channel (full-bridge) configuration,
register bits OCFG[1:0] = 00
BQ#4
2.1-channel configuration,
register bits OCFG[1:0] = 01
1-channel mono-parallel configuration,
register bits OCFG[1:0] = 11
The setup register is
F (addr 0x05) on page 30
If DEMP = 1
Emphasis
De-
Filter
Bass
If CxT CB = 0
BT C: Bass Boost/Cut
T T C: T reble Boost/Cut
Configuration register
T reble
Filter
T o
Mix
STA326