CS4245 Datasheet, PDF (28/54 Pages) Cirrus Logic – 105 dB, 24-Bit, 192 kHz Streo Sudio CODEC

CS4245
3. TYPICAL CONNECTION DIAGRAM
+3.3V to +5V
10 µF 0.1 µF
0.1 µF 0.1 µF 10 µF
+3.3V to +5V
+1.8V
to +5V
+1.8V
to +5V
Digital Audio
Playback
Digital Audio
Capture
VD
VA
0.1 µF ^VLS
MCLK2
SCLK2
LRCK2
SDIN
MCLK1
SCLK1
LRCK1
SDOUT
Micro-
Controller
INT
OVFL
RESET
SCL/CCLK
SDA/CDOUT
AD1/CDIN
AD0/CS
2 kΩ
See Note 1
2 kΩ
0.1 µF
VLC
VA
AUXOUTA
AUXOUTB
3.3 µF
3.3 µF
MUTEC
AOUTA
AOUTB
Mute
Drive
3.3 µF
470 Ω
10 kΩ
10 kΩ
*C
*C
Optional
Analog
Muting
3.3 µF
470Ω
See Note 2
R_ext
R_ext
AIN1A
1800 pF _{* 10 µF} 100 Ω
Left Analog Input 1
100 kΩ
*
1800 pF
10 µF _{100 Ω}
AIN1B
100 kΩ
Right Analog Input 1
AIN2A
1800 pF _{* 10 µF} 100 Ω
Left Analog Input 2
100 kΩ
*
1800 pF
10 µF _{100 Ω}
AIN2B
100 kΩ
Right Analog Input 2
AIN3A
1800 pF _{* 10 µF} 100 Ω
Left Analog Input 3
100 kΩ
*
1800 pF
10 µF _{100 Ω}
AIN3B
100 kΩ
Right Analog Input 3
Note 1: Resistors are required for I²C control
port operation
Note 2 :
For best response to Fs/2 :
C
=
R_ext + 470
4πFs(R_ext × 470)
This circuitry is intended for applications where
the CS4245 connects directly to an unbalanced
output of the design. For internal routing
applications please see the DAC Analog Output
Characteristics section for loading limitations.
10 µF 0.1 µF
47 µF 0.1 µF
47 µF 0.1 µF
10 µF 0.1 µF
Note 3: The value of R_L is dictated by the
microphone carteridge.
VQ1
FILT1+
AGND
FILT2+
VQ2
AIN4A/MICIN1
1800 pF _{* 10 µF} 100 Ω
Left Analog Input 4
100 kΩ
*
1800 pF
10 µF _{100 Ω}
AIN4B/MICIN2
100 kΩ
Right Analog Input 4
AIN5A
1800 pF _{* 10 µF} 100 Ω
Left Analog Input 5
100 kΩ
*
1800 pF
10 µF
100 Ω
AIN5B
100 kΩ
Right Analog Input 5
AIN6A
1800 pF _{* 10 µF} 100 Ω
Left Analog Input 6
100 kΩ
DGND
AIN6B
MICBIAS
AGND
AGND
AFILTA
AFILTB
*
1800 pF
10 µF _{100 Ω}
Note 3
47 µF ^RL
100 kΩ
Right Analog Input 6
*
*
2.2nF 2.2nF
* Capacitors must be C0G or equivalent
Figure 12. Typical Connection Diagram
28