CS42L55 Datasheet, PDF (8/73 Pages) Cirrus Logic – Ultra Low Power, Stereo CODEC w/Class H Headphone Amp

1. PIN DESCRIPTIONS
CS42L55
SDIN 1
LRCK ²
SDA ³
SCL ⁴
VCP 5
FLYP ⁶
+VHPFILT ⁷
FLYC ⁸
FLYN ⁹
36 35 34 33 32 31 30 29 28
GND/Thermal Pad
Top-Down (Through Package)
View
27 _AIN1REF
26 _AIN1A
25 _AIN2B
24 _AIN2REF
23 _AIN2A
22 _AFILTB
21 _AFILTA
20 _VQ
19 _FILT+
10 11 12 13 14 15 16 17 18
Pin Name
SDIN
LRCK
SDA
SCL
VCP
FLYP
+VHPFILT
FLYC
FLYN
-VHPFILT
HPOUTA
HPOUTB
HPREF
LINEOUTA
LINEOUTB
LINEREF
#
Pin Description
1 Serial Audio Data Input (Input) - Input for two’s complement serial audio data.
2
Left Right Clock (Input/Output) - Determines which channel, Left or Right, is currently active on the
serial audio data lines.
3 Serial Control Data (Input/Output) - Serial data for the I²C serial control port.
4 Serial Control Port Clock (Input) - Serial clock for the I²C serial control port.
5 Step-Down Charge Pump Power (Input) - Power supply for the step-down charge pump.
6
Charge Pump Cap Positive Node (Output) - Positive node for the step-down charge pump’s flying
capacitor.
7
Step-Down Charge Pump Filter Connection (Output) - Power supply from the step-down charge
pump that provides the positive rail for the headphone and line amplifiers
8
Charge Pump Cap Common Node (Output) - Common positive node for the step-down and inverting
charge pumps’ flying capacitors.
9
Charge Pump Cap Negative Node (Output) - Negative node for the inverting charge pump’s flying
capacitor.
10
Inverting Charge Pump Filter Connection (Output) - Power supply from the inverting charge pump
that provides the negative rail for the headphone and line amplifiers.
11 Headphone Audio Output (Output) - The full-scale output level is specified in the HP Output Charac-
13 teristics specification table
12 Pseudo Diff. Headphone Output Reference (Input) - Ground reference for the headphone amplifiers
14 Line Audio Output (Output) - The full-scale output level is specified in the Line Output Characteristics
16 specification table
15 Pseudo Diff. Line Output Reference (Input) - Ground reference for the line amplifiers.
8
DS773F1