NAD C715 Service Manual page 33

Pin
Pin name
No.
75 PVSS3
76 SLCO
77 RFI
78 RFRPI
79 RFEQO
80 RESIN
81 VRO
82 VMDIR
83 TESTR
84 INVSEL
85 AGCI
86 RFDCI
87 RFO
88 PNSEL
89 EQSET
90 RVDD3
91 LDO
92 MDI
93 RVSS3
I/O
3.3 V grounding pin dedicated to the PLL
—
circuit.
EFM slice level output pin.
O
For both analog and digital slice modes,
3AI/F
the output impedance # 2.5 k:.
RF signal input pin.
I
The input resistance can be selected, using
3AI/F
a command.
I
RF ripple signal input pin.
3AI/F
O
RF equalizer circuit output pin.
3AI/F
I Pin for connecting a reference current
3AI/F generating resistance.
O
1.65 V reference voltage output pin.
3AI/F
Reference voltage output pin for the APC
—
circuit.
O
LPF pin for RFEQO offset correction.
3AI/F
I
Test pin, usually fixed at "L".
3AI/F
I Pin for RF signal amplitude adjustment
3AI/F amp input.
I
RF signal peak detection input pin.
3AI/F
O
RF signal generation amp output pin.
3AI/F
I
Test pin, usually fixed at "H".
3AI/F
O External connection pin for the RF signal
3AI/F equalizer.
3.3V Supply voltage pin for the RFamp core
—
section
O
Laser diode amp output pin.
3AI/F
I
Monitor photodiode amp input pin.
3AI/F
3.3 V grounding pin for the RF amp core
—
section.
Description
2-22
Remark
—
A capacitor to be
connected is selected
according to the servo
operation band.
Zin: 20k:, 10k:, 5k:
—
To be connected to the
RFRPI via 0.1 uF and to
the RFI via 4700 pF or
higher.
To be connected to 22 k:
and 680 pF in parallel.
Connected to the V
REF
and PV within the IC.
REF
To be connected to 0.1 uF
and 100 uF.
To be connected to 0.1
uF.
To be connected to
0.015 uF or higher.
—
—
—
To be connected directly
to the RFDCI.
To be connected to the
AGCI via 0.1 uF.
To be kept open when the
RFEQ is used.
—
Reference to 178 mV (typ.)
—