CS4351
1. PIN DESCRIPTION
20
19
18
1
SDIN
SCLK
LRCK
MCLK
VD
VL
2
AMUTEC
AOUTA
VA_H
GND
AOUTB
BMUTEC
VQ
3
4
17
16
15
14
13
12
5
6
GND
7
DIF1(SCL/CCLK)
DIF0(SDA/CDIN)
DEM(AD0/CS)
RST
8
9
VBIAS
VA
10
11
Pin Name
SDIN
#
1
2
Pin Description
Serial Audio Data Input (Input) - Input for two’s complement serial audio data.
Serial Clock (Input) - Serial clock for the serial audio interface.
SCLK
Left / Right Clock (Input) - Determines which channel, Left or Right, is currently active on the serial
audio data line.
LRCK
3
MCLK
VD
4
5
Master Clock (Input) - Clock source for the delta-sigma modulator and digital filters.
Digital Power (Input) - Positive power supply for the digital section.
6
16
GND
RST
Ground (Input) - Ground reference.
Reset (Input) - Powers down device and resets all internal resisters to their default settings when
enabled.
10
VA
11 Low Voltage Analog Power (Input) - Positive power supply for the analog section.
12 Positive Voltage Reference (Output) - Positive reference voltage for the internal DAC.
13 Quiescent Voltage (Output) - Filter connection for internal quiescent voltage.
17 High Voltage Analog Power (Input) - Positive power supply for the analog section.
20 Serial Audio Interface Power (Input) - Positive power for the serial audio interface
14
VBIAS
VQ
VA_H
VL
BMUTEC
AMUTEC
Mute Control (Output) - Control signal for optional mute circuit.
19
AOUTB
AOUTA
15 Analog Outputs (Output) - The full scale analog line output level is specified in the Analog Character-
18 istics table.
Control Port Definitions
SCL/CCLK
SDA/CDIN
AD0/CS
7
8
9
Serial Control Port Clock (Input) - Serial clock for the control port interface.
Serial Control Data (Input/Output) - Input/Output for I²C data. Input for SPI data.
Address Bit 0 / Chip Select (Input) - Chip address bit in I²C Mode. Control Port enable in SPI Mode.
Stand-Alone Definitions
DIF0
DIF1
8
7
Digital Interface Format (Input) - Defines the required relationship between the Left Right Clock,
Serial Clock, and Serial Audio Data.
De-emphasis (Input) - Selects the standard 15 µs/50 µs digital de-emphasis filter response for 44.1
kHz sample rates
DEM
9
DS566F1
5
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