CXA2542Q データシートの表示（PDF） - Sony Semiconductor
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CXA2542Q Datasheet PDF : 49 Pages
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CXA2542Q
Tracking Error Amplifier
R2
R5
260k
13k
TE AMP
C2
12p
R3
26k
NORMAL
R16
96k
R14
13k
R9
TGFL
F 38
VC
17k
VF
R8
17k
GAIN UP
R18
GAIN UP
15k
VC
F I-V AMP R1
260k
R4
6.8k
R13
13k
V
TGFL
NORMAL
R12
E 39
C1
12p
96k
VE
VC
VC
VC
E I-V AMP
RE
VC
R23 R24
100k 150k
C3
C4
0.01µ 0.01µ
TEO
GND
41
GND
LPFI
42
VIN > VH L
VIN < VH H
VH
BALH
20mV
VC
VIN
BALL
–
+
VL VIN > VL H
–20mV VIN < VL L SENS
VC
VIN > VH L SELECTOR
VH VIN < VH H
TGH
200mV
SENS1
23
VC
VIN
TGL
150mV
VL
VIN > VL H
VIN < VL L
VC
CCOOMMAANNDD
CCOONNTTRROOLL
SENS2
24
XRST
21
DATA
20
XLT
19
CLK
18
CPU
The difference between E I-V amplifier output VE and F I-V amplifier output VF is taken and output from TEO.
The tracking error amplifier has built-in balance and gain adjustment circuits to enable software-based
automatic adjustment.
The balance adjustment is performed by varying the combined resistance value of the T-configured feedback
resistance at the E I-V amplifier.
E I-V AMP feedback resistance = R1 + R4 + R1 × R4
RE
F I-V AMP feedback resistance = R2 + R5 + R2 × R5 = 403kΩ
R3
Vary the combined resistance value of the E I-V amplifier's feedback resistance by using the balance
adjustment switches (BAL1 to BAL4).
The gain adjustment is performed by resistance dividing the TE AMP output by the gain adjustment switches
(TOG1 to TOG4).
The balance and gain adjustment switches are controlled with commands.
Set the cut-off frequency of the external LPF between 10Hz to 100Hz.
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