Marantz PMD671, Service Manual

Page: 36 / 68

52
Q402:AK5380VT
∆∑
Modulator
MCLK
AINL
LRCK
SCLK
SDTO
DIF
VCOM
Clock Divider
AINR
AGND VA
Decimation
Filter
Serial I/O
Interface
Voltage Reference
TTL
DGND VD
TST
∆∑
Modulator
Decimation
Filter
PDN
No. Pin Name I/O Description
1 AINR I Rch Analog Input Pin
2 AINL I Lch Analog Input Pin
3 NC - NC Pin
No internal bonding.
4 VCOM O Common Voltage Output Pin
Normally connected to AGND with a 0.1
µ
F ceramic capacitor in parallel with an
electrolytic capacitor less than 2.2
µ
F.
5 AGND - Analog Ground Pin, 0V
6 VA - Analog Power Supply Pin, +4.5 to +5.5V
7 VD -
Digital Power Supply Pin, +2.7 to +5.5V(fs=48kHz), +4.5 to +5.5V(fs=96kHz)
8 DGND - Digital Ground Pin, 0V
9 SDTO O Serial Data Output Pin
Data bits are presented MSB first, in 2’s complement format.
This pin is “L” in the power-down mode.
10 LRCK I Left/Right Channel Select Pin
The fs clock is input to this pin.
11 MCLK I Master Clock Input Pin
12
SCLK I Serial Data Input Pin
Output data is clocked out on the falling edge of SCLK.
13 PDN I Power-Down Pin
When “L”, the circuit is in power-down mode.
The AK5380 should always be reset upon power-up.
14 DIF I Serial Interface Format Pin
“L”: MSB justified, “H”: I
2
S
15 TTL I Digital Input Level Select Pin
“L”: CMOS level (VD=2.7 to 5.5V), “H”: TTL level (VD=4.5 to 5.5V)
16 TST I Test Pin (Internal pull-down pin)
This pin should be left open.
Note: All input pins except pull-down pins should not be left floating.