TLC320AD81C Datasheet, PDF (35/47 Pages) Texas Instruments – Stereo Audio Digital Equalizer DC

6 Application Information
Typical applications for the TLC320AD81C include:
• Digital speakers
• Multi media monitors with speakers
• USB audio devices
The TLC320AD81C is designed to interface to a serial audio source and can handle up to two SDIN audio
data streams. In a multiple SDIN application as shown, latency of the ADC should be taken into account.
A controller is used to translate between USB audio and serial audio. Audio control functions are
downloaded to the TLC320AD81C through the I²C port. One option is for this to be the same controller as
the USB controller, although shown as separate controllers. The output of the device interfaces to the power
amplifiers, however, prefiltering is recommended. Voltage regulators, and bypass capacitors (not shown)
on the power supplies are recommended good practices.
USB Data Stream
Digital Audio
I2S Data
USB
to
I2S
Controller
USB
to
I2C
Controller
Power
Amplifier
SCL
MCLK
SDA
LRCLK
TLC320AD81C
SDIN1
SCLK
SDIN2
Left
Right
ADC
MIC1
MIC2
Figure 6–1. Example USB Audio System
6–1