CS42L50 Datasheet, PDF (31/48 Pages) Cirrus Logic – Low Voltage, Stereo CODEC with headphone Amp

CS42L50
5. PIN DESCRIPTIONS
Filter Capacitor
Filter Capacitor
Voltage Reference
Analog Input 2 Right
Analog Input 2 Left
Ground Reference
Analog Input 1 Right
Analog Input 1 Left
Quiescent Voltage
Voltage Reference
Quiescent Voltage
Headphone A Output
Headphone Amp Power
Headphone B Output
AFLTR
AFLTL
FILT+_ADC
AIN_R2
AIN_L2
REF_GND
AIN_R1
AIN_L1
VQ_ADC
FILT+_DAC
VQ_DAC
HP_A
VA_HP
HP_B
1 28
2 27
3 26
4 25
5 24
6 23
7 22
8 21
9 20
10 19
11 18
12 17
13 16
14 15
RST
SCL
SDA
LRCK
SDOUT
VA
GND
VL
SDIN
MCLK
SCLK
MUTEC
AOUTL
AOUTR
Reset
Control Port Clock
Control Port Data
Left/Right Clock
Serial Audio Data Output
Analog Power
Ground Reference
Interface Power
Serial Audio Data Input
Master Clock
Serial Clock
External Mute Control
Analog Output Left
Analog Output Right
Pin Name # Pin Description
VA
23 Analog Power (Input) - Positive power supply for the analog section. Refer to the Recommended Oper-
ating Conditions for appropriate voltages.
VL
21 Logic Power (Input) - Determines the required signal level for the digital input/output. Refer to the Rec-
ommended Operating Conditions for appropriate voltages.
VA_HP
13 Headphone Amp Power (Input) - Positive power supply for the headphone amplifier. Refer to the Rec-
ommended Operating Conditions for appropriate voltages.
VQ_ADC
VQ_DAC
9,11 Quiescent Voltage (Output) - Filter connection for internal quiescent voltage. VQ must be capacitively
coupled to analog ground, as shown in the Typical Connection Diagram. The nominal voltage level is
specified in the Analog Characteristics and Specifications section. VQ presents an appreciable source
impedance and any current drawn from this pin will alter device performance. However, VQ can be used
to bias the analog circuitry assuming there is no AC signal component and the DC current is less than
10uA.
REF_GND
6 Reference Ground (Input) - Ground reference for the internal sampling circuits and must be connected
to analog ground.
GND
22 Ground (Input) - Ground reference. Should be connected to analog ground.
Serial Audio
Interface
MCLK
19 Master Clock (Input) - Clock source for the delta-sigma modulator and digital filters.
SCLK
18 Serial Clock (Input/Output) - Serial clock for the serial audio interface.
LRCK
25 Left Right Clock (Input/Output) - Determines which channel, Left or Right, is currently active on the
serial audio data line. The frequency of the left/right clock must be at the audio sample rate, Fs.
SDIN
20 Serial Audio Data Input (Input) - Input for two’s complement serial audio data.
SDOUT
24 Serial Audio Data Output (Output) - Output for two’s complement serial audio data.
DS544PP1
31