No. Pin Name I/O
Function
PD State
25 AOUTL2N
O Lch Negative Analog Output 2 Pin
Hi-Z
26 VREFL2
I Negative Voltage Reference Input Pin, AVSS
Hi-Z
27 VREFH2
I Positive Voltage Reference Input Pin, AVDD
Hi-Z
28 AOUTR2N
O Rch Negative Analog Output 2 Pin
Hi-Z
29 AOUTR2P
O Rch Positive Analog Output 2 Pin
Hi-Z
30 AVSS
- Analog Ground Pin
－
31 AVDD
- Analog Power Supply Pin, 3.0V-5.5V
－
32 AOUTL3P
O Lch Positive Analog Output 3 Pin
Hi-Z
33 AOUTL3N
O Lch Negative Analog Output 3 Pin
Hi-Z
34 VREFH3
I Positive Voltage Reference Input Pin, AVDD
Hi-Z
35 VREFL3
I Negative Voltage Reference Input Pin, AVSS
Hi-Z
36 AOUTR3N
O Rch Negative Analog Output 3 Pin
Hi-Z
37 AOUTR3P
O Rch Positive Analog Output 3Pin
Hi-Z
38 AOUTL4P
O Lch Positive Analog Output 4 Pin
Hi-Z
39 AOUTL4N
O Lch Negative Analog Output 4 Pin
Hi-Z
40 VREFH4
I Positive Voltage Reference Input Pin, AVDD
Hi-Z
41 VREFL4
I Negative Voltage Reference Input Pin, AVSS
Hi-Z
42 AOUTR4N
O Rch Negative Analog Output 4 Pin
Hi-Z
43 AOUTR4P
O Rch Positive Analog Output 4 Pin
Hi-Z
44 LDOE
I Internal LDO Enable Pin. "L": Disable, "H": Enable
Hi-Z
45 TVDD
- Digital Power Supply Pin, 3.0V-3.6V
－
46 DVSS
- Digital Ground Pin
－
47 VDD18
O LDO Output Pin (LDOE pin = "H") This pin should be connected to DVSS with 1.0µF.
(Note 4)
I 1.8V Power Input Pin (LDOE pin = "L")
48 PDN
I Power-Down & Reset Pin
When this pin is "L", the AK4458 is powered-down and the control registers are reset to default state.
Hi-Z
Note 2. All input pins except internal pull-up/down pins should not be left floating.
Note 3. PCM mode and DSD mode are controlled by registers. Daisy Chain mode is controlled by both registers and pins.
Note 4. This pin outputs DVSS when the LDOE pin = "H" and Hi-z when the LDOE pin = "L".
FUNCTIONAL BLOCK DIAGRAM
[AK4458]
014011794-E-00
2015/01
- 5 -
4. Block Diagram and Functions
MCLK
SDTI1/DSDR1
LRCK/DSDL1
CAD0_I2C/CSN/DIF
BICK/DCLK
SCL/CCLK/TDM1
SDA/CDTI/TDM0
PDN
AVDD
Clock
Divider
DVSS
TVDD
PS/CAD0_SPI
AOUTR1N
VREFH1
VREFL1
AVSS
AOUTL1P
AOUTR1P
PCM
Data
Interface
De-empha
sis
DSD
Data
Interface
8X
Interpolator
Control
Register
SCF
SCF
AOUTR2N
VREFH2
VREFL2
AOUTL2P
AOUTL2N
AOUTR2P
Vref
SDTI2/DSDL2
8X
Interpolator
SCF
SCF
Vref
Bias
I2C
AOUTR3N
VREFH3
VREFL3
AOUTL3P
AOUTL3N
AOUTR3P
8X
Interpolator
SCF
SCF
AOUTR4N
VREFH4
VREFL4
AOUTL4P
AOUTL4N
AOUTR4P
Vref
8X
Interpolator
SCF
SCF
Vref
SDTI3/DSDR2/TDMO1
SDTI4/DSDL3/TDMO2
DSDR3
DSDL4
DSDR4
VDD18
LDO
DZF/SMUTE
CAD1/DCHAIN
LDOE
DATT
Soft Mute
DSD Filter
DATT
Soft Mute
DATT
Soft Mute
DSD Filter
DATT
Soft Mute
DATT
Soft Mute
DSD Filter
DATT
Soft Mute
DATT
Soft Mute
DSD Filter
DATT
Soft Mute
Modulator
Noise
Rejection
Filter
Modulator
Noise
Rejection
Filter
Modulator
Noise
Rejection
Filter
Modulator
Noise
Rejection
Filter
AOUTL1N
Figure 1. Block Diagram
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