Sony CXA2557R Rf amplifier for cd player/cd-rom Datasheet

CXA2557R
RF Amplifier for CD Player/CD-ROM
For the availability of this product, please contact the sales office.
Description
The CXA2557R is an RF signal processing IC for
CD players, CD-ROM and CD-RW (playback).
Features
• Wide-band RF AC amplifier
• Supports CD-RW playback (RF DC, RF AC, FE,
TE and AL amplifiers)
• 5-mode RF AC equalizer (active filter type)
• RF AC equalizer boost amount and cut-off frequency
adjustable
• Voltage gain adjustable for RF DC, RF AC, FE, TE
and AL amplifier
• RF DC amplifier offset voltage switchable
• FE and TE amplifier bias voltage adjustable
• Tracking error amplifier cut-off frequency adjustable
• Alignment amplifier
• Center error amplifier
• AGC (Automatic Gain Control) function
• APC (Automatic Power Control) function
• VC/VC IN separation
• Supports laser coupler/3 spots
48 pin LQFP (Plastic)
Structure
Bipolar silicon monolithic IC
Absolute Maximum Ratings (Ta = 25°C)
• Supply voltage
VCC – GND
7
V
• Storage temperature Tstg
–65 to +150 °C
• Power consumption
PD
400
mW
Operating Conditions (Ta = 25°C)
• Supply voltage
VCC – GND 3.5 to 5.5
• Operating temperature Topr
–20 to +75
V
°C
Functions
• RF DC summing amplifier
• RF AC summing amplifier
• RF AC equalizer
• Focus error (FE) amplifier
• Tracking error (TE) amplifier
• Alignment (AL) amplifier
• Center error (CE) amplifier
• Mirror circuit
• AGC circuit
• VREF output
Applications
• CD players
• CD-ROM drives
Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by
any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the
operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.
–1–
E97757-PS
CXA2557R
Block Diagram
APC ON
DC OFFSET
RW SW DC
A 3
B 4
RF DC
SUM AMP
32 RW SW
RF DC AMP
RF SW DC
RW SW AC
RW SW 1
RW SW DC
RW SW AC
RW SW 1
26 RF DC OUT
RF DC VCA
C 5
RF DC OUT
VCA CNT
D 6
48 RF AC OUT
RF AC SUM AMP
RW SW AC
RF AC VCA
FE AMP
FE VCA
RW SW 1
FE VCA
CNT
TE AMP
TE RW AMP
TE VCA
RW SW 1
TE VCA
CNT
VCA CNT
20 FE
FE BIAS
19 FE BIAS
E 8
F 9
38 FE CNT
TE BIAS
17 TE
18 TE BIAS
TE MODE
39 TE CNT
40 AL CNT
TE 1 10
AL IN 11
AL AMP
AL VCA
12 AL
AL DRV
13 AL 1
RW SW 1
14 CE IN
15 CE 1
CE AMP
RF DC OUT
LPF 1
LPF 2
LPF 3
AMP
HALF
MIRR CNT 37
PBH CNT 21
CE DRV
COMP
ADJ
16 CE
25 MIRR
24 MIRR BIAS
MIRR CNT
PEAK
HOLD
23 PH C
BOTTOM
HOLD
22 BH C
LPF
PBH CNT
33 AGC SW
HPF
PEAK
HOLD 1
AMP
PEAK
HOLD 2
COMP
VCA CNT
41 VCA
46 HOLD C
MODE 1
LPF 1
EQ IN 47
FC CNT 1 44
DELAY
MIXER
LPF 2
LPF 3
LPF 4
29 RFO 1
AMP
30 RFO 2
FC CNT
FC CNT 2 45
FC H CNT 43
HPF
BOOST
MODE CNT
APC AMP
MODE 1 34
PD
LD
BOOST
CNT
27
28
VC
31
VCC
7
VC IN
APC ON
GND
MODE 2 35
BST CNT 42
2
1
–2–
36 APC ON
CXA2557R
APC ON
MODE 2
MODE 1
AGC SW
RW SW
VCC
RFO 2
RFO 1
VC
VC IN
RF DC OUT
MIRR
Pin Configuration
36
35
34
33
32
31
30
29
28
27
26
25
MIRR CNT 37
24 MIRR BIAS
FE CNT 38
23 PH C
TE CNT 39
22 BH C
AL CNT 40
21 PBH CNT
VCA 41
20 FE
BST CNT 42
19 FE BIAS
FC H CNT 43
18 TE BIAS
FC CNT 1 44
17
FC CNT 2 45
16 CE
HOLD C 46
TE
15 CE 1
EQ IN 47
14 CE IN
RF AC OUT 48
1
2
3
4
5
6
7
8
9
10
11
12
LD
PD
A
B
C
D
GND
E
F
TE 1
AL IN
AL
13 AL 1
–3–
CXA2557R
Pin Description
Pin
No.
Symbol
I/O
Equivalent circuit
Description
10k
1
LD
O
2
PD
I
1
APC amplifier output.
124
55k
20k
124
APC amplifier input.
2
20k
3
40k
40k
40k
40k
10k 45k
40k
4
40k
40k
40k
3
4
5
6
A
B
C
D
I
I
I
I
Inputs of RF summing amplifier
and focus error amplifier.
When using a laser coupler:
A + C = PD1
B + D = PD2
5
6
130k
40k
130k
40k
40k
40k
180k
180k
180k
180k
7
GND
—
130k
130k
Ground.
–4–
CXA2557R
Pin
No.
Symbol
I/O
Equivalent circuit
124
8
9
E
F
Description
124
9
8
I
I
Tracking error amplifier inputs.
124
VCA
10
TE 1
RW
10
Tracking error amplifier inverted
output.
O
20k
124
11
AL IN
I
11
20k
Alignment amplifier input.
9k
40k
6.2k
13.3k
124
15k
12
AL
O
12
Alignment amplifier non-inverted
output.
13
Alignment amplifier inverted
output.
15k
7.5k
124
13
AL 1
O
34k
45k
14
CE IN
I
15
CE 1
Center error amplifier input.
124
124
15
14
Center error amplifier inverted
output.
O
124
20k
16
16
CE
Center error drive amplifier
inverted output.
O
–5–
CXA2557R
Pin
No.
Symbol
17
TE
I/O
Equivalent circuit
O
Description
Tracking error amplifier noninverted output.
124
40k
VCA
17
50k
18
TE BIAS
I
19
FE BIAS
I
18
200k
Tracking error amplifier bias
adjustment.
Focus error amplifier bias
adjustment.
300k
VCA
124
300k
20
107k
375k
20
FE
O
21
PBH
CNT
I
22
BC C
I
19
Mirror circuit peak hold and
bottom hold time constant
setting input.
50k
21
500
22
40k
20k
40k
23
PH C
24
MIRR
BIAS
23
I
Focus error amplifier noninverted output.
500
Connects the capacitor that
sets mirror circuit bottom hold
time constant.
Connects the capacitor that sets
mirror circuit peak hold time
constant.
20k
I
35k
20k
24
3k
2.7k
50k
–6–
Mirror circuit bias adjustment.
CXA2557R
Pin
No.
Symbol
I/O
Equivalent circuit
Description
8k
25
MIRR
124
O
25
7.7k
200k
Mirror comparator output.
2k
20k
26
RF DC
OUT
RF DC amplifier output.
Eye pattern check point.
26
O
20k
20k
27
VC IN
I
28
VC
O
Reference voltage input.
—
150
(VCC + GND)/2 voltage output.
28
150
29
RFO 1
O
3k
3k
3k
3k
RF AC amplifier output.
29
280
280
30
30
RFO 2
O
31
VCC
—
RF AC amplifier buffer switch
output.
ON when Pin 34 is connected
to GND.
Power supply.
—
–7–
CXA2557R
Pin
No.
Symbol
I/O
Equivalent circuit
15k
40k
80k
20k
60k
Description
15k
20k
32
RW SW
I
124
32
20k
15k
40k
CD-ROM/RW switching input.
RW when connected to VCC,
ROM when connected to GND.
80k
15k
33
AGC
SW
15k
I
20k
60k
33
15k
AGC/VCA switching input.
AGC when connected to VCC,
VCA when connected to GND.
Double-speed mode switching
pins.
124
40k
80k
15k
34
15k
MODE 1 MODE 2
L
M
80k 15k
34
MODE 1
I
H
40k
15k
80k 15k
X
L
M
H
X
fc
×n
× 2n
× 4n
× 6n
×N
∗ X = L or M or H
n is determined by the external
resistor connected to Pin 44.
N is determined by the external
resistor connected to Pin 45
and the Pin 43 input voltage.
40k
15k
MODE 1 MODE 2
20kHz
L
80k 15k
35
MODE 2
I
35
Pin 34 also serves as switching
pin for the tracking error
amplifier cut-off frequency and
RFO2 output ON/OFF switching
pin.
40k
M
H
15k
250kHz
fc
ON
OFF
∗ L = GND, M = VC, H = VCC
–8–
CXA2557R
Pin
No.
Symbol
I/O
Equivalent circuit
Description
40k
124
36
10k
100k
40k
36
APC ON
I
80k
20k
80k
40k
37
MIRR
CNT
I
Switching pin for RF DC
amplifier offset setting.
No addition to RF DC amplifier
when Medium (VC).
VCC/6 added to RF DC amplifier
when Low (GND).
10k
Mirror circuit LPF cut-off
frequency setting input.
37
12k
12k
38
FE CNT
I
Focus error amplifier gain
adjustment input.
38
21k
21k
39
39
TE CNT
I
21k
21k
40
AL CNT
I
Tracking error amplifier gain
adjustment input.
Alignment amplifier gain
adjustment input.
40
21k
21k
–9–
CXA2557R
Pin
No.
Symbol
I/O
Equivalent circuit
Description
80k
41
VCA
I
41
80k
40k 26.7k
20k
42
BST
CNT
I
42
43
FC H
CNT
I
43
Equalizer circuit boost amount
adjustment input.
20k
Cut-off frequency N adjustment
input when Pin 34 is High.
20k
5k
5k
44
FC CNT
1
80k
40k
15k
5k
Connects the external resistor
that sets cut-off frequency n
when Pin 34 is Low or Medium.
124
I
44
5k
5k
45
FE CNT
2
I
46
HOLD C
I
RF DC and RF AC amplifier
gain adjustment input.
AGC circuit target voltage input
when AGC SW is ON.
15k
5k
124
45
46
Connects the external resistor
that sets cut-off frequency N
when Pin 34 is High.
Connects the capacitor that
sets AGC time constant.
– 10 –
CXA2557R
Pin
No.
Symbol
I/O
Equivalent circuit
1.1k
1.1k
47
EQ IN
I
47
Description
Equalizer circuit input.
1.3k
5k
5k
3k
48
RF AC
OUT
3k
O
48
– 11 –
RF AC summing amplifier noninverted output.
ICC
IEE
Current consumption
Current consumption
GRFDV3
GRFDV4
VCA gain 3
VCA gain 4
22
23
21
20
GRFD2
GRFDV1
VCA gain 1
Voltage gain 2
GRFD1
Voltage gain 1
GRFDV2
VCE
Output offset voltage
Output offset voltage 4 VAL4
Output offset voltage 3 VAL3
Output offset voltage 2 VAL2
Output offset voltage 1 VAL1
Output offset voltage 2 VTE2
Output offset voltage 1 VTE1
Output offset voltage 2 VFE2
Output offset voltage 1 VFE1
Output offset voltage 2 VRFA2
S2, S3, S4, S5, S16, S25
S2, S3, S4, S5, S16, S25
S2, S3, S4, S5, S16
S2, S3, S4, S5, S25
S2, S3, S4, S5, S25
S2, S3, S4, S5
S16
S16
S16
S16
S16
S20-b
Output offset voltage 3 VRFD3
Output offset voltage 1 VRFA1
S16
SW conditions
Output offset voltage 2 VRFD2
Output offset voltage 1 VRFD1
VVCB
Output voltage
Measurement item
VCA gain 2
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
Offset voltage
1
RF DC
RF AC
FE
TE
AL
CE
– 12 –
RF DC
No.
Current
consump VC
-tion
Electrical Characteristics
E1
–1.0
1.0
–1.0
1.0
E2
Bias conditions (V)
100kHz 18mVp-p
100kHz 80mVp-p
Input
–680.0 –560.0 –440.0
26
52.0
10.0
5.0
GRFD2 (TS) – GRFD1
GRFDV3 (TS) – GRFD2 (TS)
(TS) – GRFD2 (TS) –11.0
–11.0
GRFDV2 (TS) – GRFD1
5.0
13.8
26
–110.0
–110.0
–10.0
–10.0
–210.0
–210.0
–60.0
–57.0
–8.0
8.0
13.0
–8.0
8.0
16.8
20.0
–50.0
–50.0
50.0
50.0
–80.0
–80.0
20.0
23.0
–210.0 –130.0
–215.0 –135.0
–68.0
–30.0
GRFDV4
–64.0
–43.0
–5.0
11.0
16.0
–5.0
11.0
19.8
70.0
10.0
10.0
110.0
110.0
50.0
50.0
100.0
103.0
–50.0
–55.0
172.0
–640.0 –520.0 –400.0
16
13
12
17
20
48
–85.0
85.0
7
64.0
43.0
20.0
Max.
31
0.0
Typ.
–20.0
Min.
Ratings
28
GRFDV1 (TS) – GRFD1
Output
∗IC pin No.
dB
dB
dB
dB
dB
dB
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mA
mA
mA
Unit
(Ta = 25°C, VCC = 1.9V, GND = VC, VEE = –1.9V)
CXA2557R
– 13 –
S11
S11
S3, S5
Bias characteristics 1 BFE1
Bias characteristics 2 BFE2
VFEH
VFEL
Output voltage High
Output voltage Low
43
44
45
46
S3, S5
S3, S5, S16, S22
S3, S5, S16, S22
GFEV4
40
VCA gain 4
S3, S5, S16
S2, S4, S16
42
GFE3
Voltage gain 3
S3, S5
GFEV3
FFE
Frequency response
S3, S5, S22
VCA gain 3
GFEV2
VCA gain 2
S3, S5, S22
41
GFEV1
VCA gain 1
S3, S5
GFE4
GFE2
S2, S4
S2, S3, S4, S5
S2, S3, S4, S5
S2, S3, S4, S5, S16, S25
S2, S3, S4, S5, S16, S25
S2, S3, S4, S5, S16
S2, S3, S4, S5, S25
S2, S3, S4, S5, S25
S2, S3, S4, S5
S2, S3, S4, S5
S2, S3, S4, S5
SW conditions
Voltage gain 4
39
38
37
36
35
34
Voltage gain 2
VRFAL1
Output voltage Low
33
GFE1
VRFAH1
Output voltage High
32
Voltage gain 1
VRFA4
30
29
VCA gain 4
VRFA2
VCA gain 2
31
VRFA1
VCA gain 1
VRFA3
GRFA1
Voltage gain 1
VCA gain 3
VRFDL
Output voltage Low
GRFA2
VRFDH
Output voltage High
Measurement item
Voltage gain 2
28
27
26
25
24
No.
RF DC
RF AC
FE
–1.0
1.0
E1
–1.0
1.0
–1.0
1.0
–1.0
1.0
–1.0
1.0
E2
Bias conditions (V)
–1.9V DC
1.9V DC
1kHz 42mVp-p
25kHz 189mVp-p
1kHz 189mVp-p
–1.0V DC
1.0V DC
100kHz 38mVp-p
100kHz 170mVp-p
–1.0V DC
1.0V DC
Input
20
48
26
5.5
–9.5
VRFA3 (TS) – GRFA2 (TS)
VRFA4 (TS) – GRFD2 (TS)
—
Max.
370.0
–7.5
7.5
10.1
–8.0
8.0
2.7
480.0
–5.5
9.5
12.1
–6.0
10.0
4.7
dB
—
—
mV
–1680.0 –1570.0 mV
1660.0 1770.0
1070.0 1180.0 1290.0
mV
–5.0
dB
dB
dB
dB
dB
dB
dB
dB
BFE2 (TS) – VFE1
–8.0
11.0
16.0
16.0
—
–5.0
11.0
19.0
19.0
–1290.0 –1180.0 –1070.0 mV
–11.0
GFEV4 (TS) – GFE4 (TS)
8.0
13.0
13.0
—
–8.0
8.0
16.0
16.0
mV
mV
dB
dB
dB
dB
dB
dB
BFE1 (TS) – VFE1
5.0
10.0
GFE3 (TS) – GFE1
GFEV3 (TS) – GFE4 (TS)
–3.0
FFE1 (TS) – GFE2
10.0
–11.0
GFEV2 (TS) – GFE2
GFE4 (TS) – GFE2
5.0
GFEV1 (TS) – GFE2
13.0
13.0
mV
Unit
–1790.0 –1680.0 mV
1100.0
Typ.
Ratings
–730.0 –620.0 –510.0
260.0
8.1
–10.0
VRFA2 (TS) – GRFA1
GRFA2 (TS) – GRFA1
6.0
0.7
—
990.0
Min.
VRFA1 (TS) – GRFA1
Output
∗IC pin No.
(Ta = 25°C, VCC = 1.9V, GND = VC, VEE = –1.9V)
CXA2557R
GTE4
GTEV3
GTEV4
Voltage gain 4
VCA gain 3
VCA gain 4
55
56
– 14 –
S10, S18-c
S7, S18-c
Bias characteristics 2 BTE2
VTEH1
VTEL1
GAL1
GAL2
GALV1
GALV2
Output voltage High
Output voltage Low
Voltage gain 1
Voltage gain 2
VCA gain 1
VCA gain 2
S8, S16
GAL3
GAL4
GALV3
GALV4
Voltage gain 3
Voltage gain 4
VCA gain 3
VCA gain 4
67
68
69
70
S8, S16, S24
S8, S16, S24
S8, S16
S8
Frequency response 2 FAL2
66
65
S8
S8, S24
S8, S24
S8
S8
S7, S18-c
S10, S18-c
Bias characteristics 1 BTE1
S7, S16, S18-c, S23
S7, S16, S18-c, S23
Frequency response 1 FAL1
64
63
62
61
60
59
58
57
54
S6, S16, S18-c
S7, S16, S18-c
53
52
51
GTE3
S7, S18-c, S23
Voltage gain 3
GTEV2
VCA gain 2
S7, S18-c, S23
S7
GTEV1
VCA gain 1
S6, S18-c
Frequency response 2 FTE2
GTE2
Voltage gain 2
S7, S18-c
SW conditions
S7, S18-c
GTE1
Voltage gain 1
Measurement item
Frequency response 1 FTE1
50
49
48
47
No.
TE
AL
–1.0
1.0
E1
–1.0
1.0
–1.0
1.0
–1.0
1.0
–1.0
1.0
E2
Bias conditions (V)
1kHz 156mVp-p
30kHz 700mVp-p
1kHz 700mVp-p
–1.9V DC
1.9V DC
1kHz 20mVp-p
20kHz 107mVp-p
250kHz 107mVp-p
1kHz 107mVp-p
Input
10.0
10.0
4.9
–12.2
GTE3 (TS) – GTE1
GTE4 (TS) – GTE2
GTEV3 (TS) – GTE3 (TE)
GTEV4 (TS) – GTE3 (TE)
4.3
–11.9
GALV1 (TS) – GAL1
GALV2 (TS) – GAL1
12
4.5
–11.9
GAL4 (TS) – GAL3
GALV3 (TS) – GAL3 (TS)
GALV4 (TS) – GAL3 (TS)
13
12
10.0
10.0
GAL3 (TS) – GAL1
12
–2.0
FAL2 (TS) – GAL3
13
–2.0
–3.6
—
13
FAL1 (TS) – GAL1
780.0
–5.2
11.9
16.0
16.0
—
—
890.0
mV
mV
mV
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
Unit
–8.4
8.0
13.0
13.0
—
—
–8.4
8.0
–0.6
–0.6
–4.9
11.5
16.0
16.0
—
—
–4.9
11.5
2.4
2.4
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
–1760.0 –1650.0 mV
1550.0 1660.0
–3.6
12
–8.7
8.4
13.0
13.0
—
—
670.0
–3.0
FTE2 (TS) – GTE1 (TE)
—
–5.1
BTE2 (TS) – VTE1
–3.0
FTE1 (TS) – GTE1 (TE)
–8.6
11.8
23.9
23.9
Max.
–890.0 –780.0 –670.0
–12.1
GTEV2 (TS) – GTE1
8.3
20.9
20.9
Typ.
Ratings
BTE1 (TS) – VTE1
4.8
GTEV1 (TS) – GTE1
17.9
17.9
Min.
12
17
Output
∗IC pin No.
(Ta = 25°C, VCC = 1.9V, GND = VC, VEE = –1.9V)
CXA2557R
– 15 –
92
91
90
89
88
87
86
85
84
83
82
81
80
79
78
77
76
75
74
73
72
71
No.
AL
CE
APC
EQ
AGC
S8
S8
S8
S9
Output voltage Low 1 VALL1
Output voltage High 2 VALH2
Output voltage Low 2 VALL2
GCE
FCE
VCEH
VCEL
VAPCIN
VAPC1
Voltage gain
Frequency response
Output voltage High
Output voltage Low
Input voltage
Output voltage 1
S29
S29
S29
S29
S29
S2, S3, S4, S5
VAPC3
GEQ1
GEQ2
Output voltage High 2 VEQH2
Output voltage Low 2 VEQL2
VAGC3
VAGC4
Voltage gain 2
Output voltage Low 1 VEQL1
VAGC2
Voltage gain 1
Output voltage High 1 VEQH1
VAGC1
Output voltage 3
Voltage gain 1
Voltage gain 2
Voltage gain 3
Voltage gain 4
S2, S3, S4, S5, S25
S2, S3, S4, S5, S17, S25
S2, S3, S4, S5, S17, S25
S29
S1, S20-c
VAPC2
SW conditions
Output voltage 2
S1
S1
S1
S9
S9
S9
S8
Output voltage High 1 VALH1
Measurement item
E1
–1.0
–1.0
–1.0
E2
Bias conditions (V)
100kHz 100mVp-p
100kHz 40mVp-p
–1.9V DC
1.9V DC
–1.9V DC
1.9V DC
1kHz 45mVp-p
VAPCIN
VAPCIN – 100mV
VAPCIN + 100mV
adjust Input voltage
–1.9V DC
1.9V DC
30kHz 260mVp-p
1kHz 260mVp-p
–1.9V DC
1.9V DC
–1.9V DC
1.9V DC
Input
560.0
880.0
20.6
21.5
—
840.0
1090.0
11.5
18.0
26.5
19.0
14.5
21.0
29.5
22.0
17.5
24.0
32.5
25.0
–1210.0 –880.0 –590.0
590.0
–1410.0 –1130.0 –890.0
240.0
29
18.1
19.0
1700.0 1800.0
–1180.0 –1070.0 –960.0
15.6
29
mV
dB
dB
mV
–1580.0 –1090.0 mV
—
—
23.0
1650.0 1760.0 1870.0
30
30
—
20.0
—
dB
dB
dB
dB
mV
mV
mV
mV
dB
dB
mV
mV
mV
–1780.0 –1730.0 –1680.0 mV
—
mV
Unit
–1720.0 –1580.0 mV
1680.0 1790.0
–3.0
17.0
—
Max.
–1680.0 –1540.0 mV
1570.0 1690.0
—
—
16.5
Output voltage = 0V
FCE (TS) – GCE
Typ.
Ratings
1580.0 1690.0
Min.
29
1
16
13
12
Output
∗IC pin No.
(Ta = 25°C, VCC = 1.9V, GND = VC, VEE = –1.9V)
CXA2557R
S12, S21-b
S2, S3, S4, S5, S12, S21-b
S2, S3, S4, S5, S12, S21-b
S2, S3, S4, S5, S12, S21-b
S2, S3, S4, S5, S12, S21-b
MIRR frequency response 1 FMIRR1
MIRR frequency response 2 FMIRR2
MIRR frequency response 3 FMIRR3
MIRR frequency response 4 FMIRR4
97
98
– 16 –
T478
T477
∗ T475 measurement value + T476 measurement value = 33.3µs.
∗ T477 measurement value + T478 measurement value = 33.3µs.
T476
T475
MIRR frequency response measurement (T475 to T478)
96
95
94
93
Bias characteristics 2 BMIRR2
SW conditions
S12, S21-b
Measurement item
Bias characteristics 1 BMIRR1
No.
MIRR
–1.0V
GND
+1.0V
0.1
0.1
0.1
0.1
–1.0
1.0
E1
E2
Bias conditions (V)
30kHz 100mVp-p
Input
25
See the figure below.
Output
∗IC pin No.
Typ.
10.7
10.6
11.3
10.0
—
—
Max.
mV
Unit
16.7
16.6
17.3
16.0
22.7
22.6
23.3
22.0
µs
µs
µs
µs
–1585.0 –1475.0 mV
1600.0 1710.0
Min.
Ratings
(Ta = 25°C, VCC = 1.9V, GND = VC, VEE = –1.9V)
CXA2557R
CXA2557R
Electrical Characteristics Measurement Circuit
VCC VCC
VCC
S29
2 PD
c
S20
38
37
S19
36
c
S18
MODE 2 35
a
MODE 1 34
A
S3
S17
B
AGC SW 33
5 C
RW SW 32
4
D
7
GND
RFO 2 30
8
E
RFO 1 29
9
F
VC 28
VEE
VCC
S16
VEE
VCC
VCC 31
6
VCC
VCC
VEE
S4
S5
VEE
b
S2
3
VEE
VCC
b
a
APC ON
VCC
b
a
c
MIRR
CNT
39
FE CNT
40
TE CNT
41
AL CNT
42
VCA
43
BST CNT
44
FC H CNT
45
FC CNT 1
S1
46
FC CNT 2
LD
EQ IN
1
a
S21
60k 40k 20k S27 S26 S25 S24 S23 S22
47
RF AC OUT
48
b
1000p
1k
c
HOLD C
0.1µ
VEE
1µ 10k
VEE
S6
33k
S7
75k
10k
1µ
S15
33k
10k
CE
TE
TE BIAS
FE BIAS
FE
PBH CNT
BH C
PH C
MIRR
BIAS
13
14
15
16
17
18
19
20
21
22
23
24
10k
12 AL
10k
S9
MIRR 25
10k
VEE
VCC
33µ
/6.3V
33µ
/6.3V
VEE
0.1µ 0.1µ
22k10k
10k
SG
RF DC OUT 26
CE 1
11 AL IN
CE IN
75k
AL 1
S8
VC IN 27
10 TE 1
1k
10k S10
10k
S11
E1
S13
S12
E2
– 17 –
CXA2557R
Description of Functions
RF DC
RW SW
AGC SW
33
32
A 3
B 4
C 5
D 6
40k
VCA CNT
10k
40k
41 VCA
AGC
40k
40k
40k
ROM
L : VCA
H : AGC
10k
VC
26 RF DC OUT
RW
40k
L : ROM
H : RW
VC
40k
40k
45k
40k
Gain : ROM = 0dB
RW = 13dB
Gain : 12dB
L : ON
VCA
Non-inverted M : OFF
36 APC ON
Gain : 5 ± 8dB
The RF DC block processes the RF DC signal that is used for the MIRR, FOK and DEFECT signals.
This block supports CD-ROM/RW, and the gain can be switched by Pin 32 (RW SW).
The gain during RW is 13dB higher than that during ROM.
ROM is selected when Pin 32 is Low, and RW when High.
This block has a VCA, and the total gain can be adjusted by Pin 41 (VCA).
The VCA has the same characteristics (control voltage – gain) as the RF AC block.
The total gain is ROM: 17 ± 8dB
RW: 30 ± 8dB
This block has a function for shifting the output DC voltage, and this function is switched by Pin 36 (APC ON).
The DC voltage is shifted when Pin 36 is Low, and not shifted when Pin 36 is Medium.
When the DC voltage is shifted, the Pin 26 DC voltage equal to (Vcc-GND)/6 is shifted to the GND side.
The Pin 26 gain is as follows.
RF DC OUT = GRF DC · (A + B + C + D)
– 18 –
CXA2557R
RF AC
RF AC OUT
RW SW
32
A 3
VCA
Non-inverted
ROM
B 4
EQ IN
48
47
Non-inverted
D 6
29 RFO 1
EQ
C 5
13dB
RW
L : ROM
H : RW
L : VCA
H : AGC
30 RFO 2
AGC
AGC
VCA CNT
L : ON
M : OFF
H : OFF
VCA
34 MODE 1
41 VCA
33 AGC SW
Gain : ROM = 0dB
RW = 13dB
Gain : 0 ± 8dB
Gain : 20dB
The RF AC block processes the RF AC signal.
This block supports CD-ROM/RW, and the gain can be switched by Pin 32 (RW SW).
The gain during RW is 13dB higher than that during ROM.
ROM is selected when Pin 32 is Low, and RW when High.
This block has a VCA, and the total gain can be adjusted by the Pin 41 (VCA) voltage.
The VCA has the same characteristics (control voltage – gain) as the RF DC block.
The total gain is ROM: 20 ± 8dB
RW: 33 ± 8dB
The capacitor values connected between this IC and the DSP can be switched , by using the Pin 30 (RFO 2)
output.
The Pin 29 and 30 gains are as follows.
RFO 1 = GRF AC · (A + B + C + D)
RFO 2 = GRF AC · (A + B + C + D)
– 19 –
CXA2557R
EQ
EQ fc control
VCC
VCC
20k
BST CNT
FC CNT 2
42
FC H CNT
45
L : CLV
M : CLV
H : CAV
EQ IN 47
HPF
FC CNT 1
44
43
35 MODE 2
CLV
MODE
CAV
34 MODE 1
CLV
Boost
Filter fc
LPF 1
LPF 2
29 RFO 1
LPF 3
30 RFO 2
LPF 4
L : ON
M : OFF
H : OFF
The EQ block is built into the RF AC system.
The cut-off frequencies of each filter are linked.
The cut-off frequencies are set by the external resistors connected to Pins 44 (FC CNT 1) and 45 (FC CNT 2),
the Pin 43 (FC H CNT) voltage, and Pins 34 (MODE 1) and 35 (MODE 2).
The cut-off frequencies are set according to the following two systems.
CLV mode: When Pin 34 is Low, n, 2n, 4n and 6n are set by Pins 34 and 35 based on the cut-off
frequency (fc = n) set by the external resistor connected to Pin 44.
CAV mode: When Pin 43 is VC, 0.5N to 1.5N is set by the Pin 43 voltage based on the cut-off frequency
(fc = N) set by the external resistor connected to Pin 45.
n
2n
4n
6n
CLV
CAV
0.5N
N
1.5N
f
The boost amount is set by the Pin 42 (BST CNT) voltage.
The transmittance for each filter of the EQ block is as follows.
HPF: (KS2) / (S2 + 3.22597S + 2.94933)
LPF1: (2.94933) / (S2 + 3.22597S + 2.94933)
LPF2: (3.32507) / (S2 + 2.75939S + 3.32507)
LPF3: (4.20534) / (S2 + 1.82061S + 4.20534)
LPF4: (1.68536) / (S + 1.68536)
RMIN is 40kΩ for the external resistor connected to Pin 44, and 30kΩ for the external resistor connected to Pin 45.
– 20 –
CXA2557R
Pin Settings and Cut-off Frequency
MODE 1
(Pin 34)
MODE 2
(Pin 35)
L
X
mode
2n
—
M
4n
H
6n
VC – 1V
to
VC
to
VC + 1V
X
H
fc
n
L
M
FC H CNT
(Pin 43)
CLV
0.5N
to
N
to
1.5N
CAV
AGC
HOLD C
VCA
AGC SW
46
41
33
VCA
RFO 1
LPF
Peak
Hold
comp
L : VCA
H : AGC
VCA CNT
AGC
fc = 50kHz
The AGC block sets the RF AC and RF DC gains.
AGC/VCA can be switched by Pin 33 (AGC SW).
VCA is selected when Pin 33 is Low, and AGC when High.
The following can be performed by the Pin 41 (VCA) voltage.
VCA: Gain adjustment
AGC: Output amplitude setting
Pin 46 (HOLD C) is used to connect a capacitor for setting the AGC time constant.
– 21 –
CXA2557R
FE
RW SW
32
FE CNT
FE BIAS
38
19
VC
375k
130k
A 3
B 4
C 5
D 6
180k
180k
300k
ROM
180k
300k
180k
20
L : ROM
H : RW
40k
VCA
Non-inverted
VC 107k
40k
RW
40k
40k
130k
VC
Gain : 13 ± 8dB
Gain : ROM = 3dB
RW = 16dB
The FE block processes the focus error signal.
This block supports CD-ROM/RW, and the gain can be switched by Pin 32 (RW SW).
The gain during RW is 13dB higher than that during ROM.
ROM is selected when Pin 32 is Low, and RW when High.
This block has a VCA, and the total gain can be adjusted by the Pin 38 (FE CNT) voltage.
The total gain is as follows.
ROM: 16 ± 8dB
RW: 29 ± 8dB
The output DC voltage level can be adjusted by the Pin 19 (FE BIAS) voltage.
The Pin 20 gain is as follows.
FE = GFE · (B + D – A – C)
– 22 –
FE
CXA2557R
TE
MODE 1
RW SW
TE CNT
TE BIAS
34
32
40
18
TE 1
10
L : ON
M : OFF
H : OFF
F
9
45k
50k
40k
40k
ROM
VC 200k
8
E
17
VC
10k
RW
VC
VCA
Non-inverted
50k
Gain : 6.8dB
Gain : ROM = 1dB
RW = 14dB
Gain : 7.1 ± 8dB
Gain : 6dB
The TE block processes the tracking error signal.
This block supports CD-ROM/RW, and the gain can be switched by Pin 32 (RW SW).
The gain during RW is 13dB higher than that during ROM.
ROM is selected when Pin 32 is Low, and RW when High.
This block has a VCA, and the total gain can be adjusted by the Pin 39 (TE CNT) voltage.
The total gain is as follows.
ROM: 20.9 ± 8dB
RW: 33.9 ± 8dB
The output DC voltage level can be adjusted by the Pin 18 (TE BIAS) voltage.
The LPF cut-off frequency can be switched by the Pin 34 (MODE 1) voltage.
fc = 20kHz when Pin 34 is Low, and fc = 250kHz when Medium or High.
The Pin 17 gain is as follows.
TE = GTE · (F – E)
– 23 –
TE
CXA2557R
AL
RW SW
AL CNT
32
40
9k
10k
20k
ROM
AL IN 11
10k
VC
12 AL
20k
RW
L : ROM
H : RW
VCA
Non-inverted
13 AL 1
40k
Gain : ROM = –7dB
RW = 6dB
Gain : 7 ± 8dB
The AL block processes the alignment signal.
This block supports CD-ROM/RW, and the gain can be switched by Pin 32 (RW SW).
The gain during RW is 13dB higher than that during ROM.
ROM is selected when Pin 32 is Low, and RW when High.
This block has a VCA, and the total gain can be adjusted by the Pin 40 (AL CNT) voltage.
The total gain is as follows.
ROM: 0 ± 8dB
RW: 13 ± 8dB
Pin 12 (AL) is the non-inverted output, and Pin 13 (AL 1) is the inverted output with respect to the input.
The Pin 12 and 13 gains are as follows.
AL = GAL · AL IN
AL 1 = –GAL · AL IN
– 24 –
CXA2557R
CE
90k
AL or AL 1
CE IN
20k
14
TE
16
CE
15
CE 1
Gain : 7dB
Gain : 13dB
The CE block processes the center error signal.
The AL and TE signals are arithmetically amplified and output as the center error signal.
The total gain is 20dB.
The Pin 16 (CE) gain is as follows.
CE = GCE · (AL + αTE): straight optical path laser coupler
CE = GCE · (AL 1 + αTE): folded optical path laser coupler
MIRR
BH C PH C
22
RF DC
LPF
37
MIRR CNT
MIRR BIAS
24
23
Peak
Bottom
Hold
Half
25 MIRR
21
PBH CNT
The MIRR block processes the MIRR signal.
The MIRR signal is generated from the RF DC signal.
The initial stage LPF is a third-order LPF, and separates the envelope and EFM signals.
The LPF cut-off frequency can be switched by the Pin 37 (MIRR CNT) voltage.
Pins 22 (BH C) and 23 (PH C) are used to connect capacitors for peak and bottom hold of the separated
envelope signal.
The peak and bottom hold time constants are set by the Pin 21 (PBH CNT) voltage.
The DC voltage level of the mirror circuit can be adjusted by the Pin 24 (MIRR BIAS) voltage.
– 25 –
CXA2557R
Center Voltage Generation Circuit
VCC
VCC
40k
VC Buffer
VC
VC
28
40k
The center voltage VC = (VCC + GND)/2 is output from Pin 28 (VC).
The maximum output current is about ±3mA.
APC
VCC
56k
PD
10
100µ
2
LD
1
10k
10k
55k
1k
10k
56k
100
500
1.25V
1µ
When the laser diode is driven by a constant current, the optical power output has extremely large negative
temperature characteristics.
The APC circuit uses a monitor photodiode to control the laser diode current in order to maintain the optical
power output at a constant level.
– 26 –
CXA2557R
Application Circuit
FE VCA Control
TE VCA Control
AL VCA Control
RF VCA/AGC Control
VC VCC VCC
EQ Boost Control
EQ fc Control
3 spots
47k
VCC
44
43
42
41
40
39
38
37
FC H CNT
BST CNT
VCA
AL CNT
TE CNT
FE CNT
MIRR
CNT
2 PD
45
FC CNT 1
PD
46
FC CNT 2
1 LD
47
HOLD C
LD
48
EQ IN
Pickups
1µ 30k 40k 20k
RF AC OUT
0.1µ
APC On/Off SW
36
APC ON
MODE 2 35
EQ fc
A
3 A
MODE 1 34
EQ fc, TE fc
B
4 B
AGC SW 33
RF VCA/AGC SW
C
5 C
RW SW 32
6 D
VCC 31
D
E
GND
75k
VC
7 GND
RFO 2 30
8 E
RFO 1 29
9 F
VC 28
33k
F
ROM/RW SW
VCC
RF AC Out 2
10µ
VCC
0.1µ
33k
75k
0.1µ
VC IN 27
10 TE 1
CE IN
CE 1
CE
TE
TE BIAS
FE BIAS
FE
PBH CNT
BH C
PH C
MIRR
BIAS
RF DC OUT 26
AL 1
11 AL IN
12 AL
RF AC Out 1
13
14
15
16
17
18
19
20
21
22
23
24
RF DC Out
MIRR Out
0.1µ 0.1µ
VCC
47k
VCC
TE Out
MIRR 25
10µ
VCC
47k
47k
FE Out
VCC
47k
Application circuits shown are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for
any problems arising out of the use of these circuits or for any infringement of third party patent and other right due to same.
– 27 –
CXA2557R
Application Circuit
FE VCA Control
TE VCA Control
AL VCA Control
RF VCA/AGC Control
VC VCC VCC
EQ Boost Control
EQ fc Control
Laser coupler (straight optical path type)
47k
VCC
44
43
42
41
40
39
38
37
FC H CNT
BST CNT
VCA
AL CNT
TE CNT
FE CNT
MIRR
CNT
2 PD
45
FC CNT 1
PD
46
FC CNT 2
1 LD
47
HOLD C
LD
48
EQ IN
Pickups
1µ 30k 40k 20k
RF AC OUT
0.1µ
36
APC ON
MODE 2 35
APC On/Off SW
EQ fc, TE fc
PD 1
3 A
MODE 1 34
PD 2
4 B
AGC SW 33
5 C
RW SW 32
6 D
VCC 31
GND
E
75k
VC
7 GND
RFO 2 30
8 E
RFO 1 29
9 F
VC 28
33k
F
RF VCA/AGC SW
ROM/RW SW
VCC
RF AC Out 2
10µ
CE 1
CE
TE
TE BIAS
FE BIAS
FE
PBH CNT
BH C
PH C
MIRR
BIAS
RF DC OUT 26
CE IN
11 AL IN
12 AL
0.1µ
VC IN 27
10 TE 1
AL 1
75k
RF AC Out 1
VCC
0.1µ
33k
AL
EQ fc
13
14
15
16
17
18
19
20
21
22
23
24
20k 22k
47k
VCC
VCC
MIRR Out
47k
VCC
47k
TE Out
FE Out
47k
CE Out
RF DC Out
0.1µ 0.1µ
VCC
20k
MIRR 25
10µ
Application circuits shown are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for
any problems arising out of the use of these circuits or for any infringement of third party patent and other right due to same.
– 28 –
CXA2557R
Application Circuit
FE VCA Control
TE VCA Control
AL VCA Control
RF VCA/AGC Control
VC VCC VCC
EQ Boost Control
EQ fc Control
Laser coupler (folded optical path type)
47k
VCC
44
43
42
41
40
39
38
37
FC H CNT
BST CNT
VCA
AL CNT
TE CNT
FE CNT
MIRR
CNT
2 PD
45
FC CNT 1
PD
46
FC CNT 2
1 LD
47
HOLD C
LD
48
EQ IN
Pickups
1µ 30k 40k 20k
RF AC OUT
0.1µ
36
APC ON
MODE 2 35
APC On/Off SW
EQ fc, TE fc
PD 1
3 A
MODE 1 34
PD 2
4 B
AGC SW 33
5 C
RW SW 32
6 D
VCC 31
GND
E
75k
VC
7 GND
RFO 2 30
8 E
RFO 1 29
9 F
VC 28
33k
F
RF VCA/AGC SW
ROM/RW SW
VCC
RF AC Out 2
10µ
CE 1
CE
TE
TE BIAS
FE BIAS
FE
PBH CNT
BH C
PH C
MIRR
BIAS
RF DC OUT 26
CE IN
11 AL IN
12 AL
0.1µ
VC IN 27
10 TE 1
AL 1
75k
RF AC Out 1
VCC
0.1µ
33k
AL
EQ fc
13
14
15
16
17
18
19
20
21
22
23
24
20k 22k
47k
VCC
VCC
MIRR Out
47k
VCC
47k
FE Out
TE Out
47k
CE Out
RF DC Out
0.1µ 0.1µ
VCC
20k
MIRR 25
10µ
Application circuits shown are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for
any problems arising out of the use of these circuits or for any infringement of third party patent and other right due to same.
– 29 –
CXA2557R
Example of Representative Characteristics (VC voltage reference)
RF DC Characteristics Graphs (Pin 26)
Frequency response
VCA characteristics
40
27
25
RW
30
ROM
23
Gain [dB]
Gain [dB]
21
20
ROM
10
19
17
15
13
0
11
9
–10
100k
1M
Frequency [Hz]
7
VC – 1.0
10M
VC
VCA voltage [V]
VC + 1.0
RF AC Characteristics Graphs (Pin 29)
Frequency response
VCA characteristics
31
50
29
25
Gain [dB]
RW
Gain [dB]
ROM
27
40
30
ROM
20
23
21
19
17
10
MODE 1, 2 = L, L
FC CNT 1 = 40kΩ
15
13
0
10k
11
VC – 1.0
10M
100k
1M
Frequency [Hz]
EQ characteristics (CLV)
VC
VCA voltage [V]
VC + 1.0
EQ characteristics (CAV)
50
50
FC CNT 1 = 40kΩ
40
40
30
VC + 1.0V
M, M
Gain [dB]
Gain [dB]
M, L
L, L
M, H
20
10
0
100k
VC – 1.0V
20
10
1M
Frequency [Hz]
0
100k
10M
– 30 –
VC
30
MODE 1, 2 = H, L
FC CNT 2 = 30kΩ
1M
Frequency [Hz]
10M
CXA2557R
Cut-off frequency response 2
27M
1.4M
23M
N – Cut-off frequency [Hz]
n – Cut-off frequency [Hz]
Cut-off frequency response 1
1.6M
1.2M
1M
800k
600k
400k
40k
50k
60k
70k
80k
90k
FC CNT 1 external resistance [Ω]
19M
15M
11M
9M
7M
30k
100k
Boost characteristics (CLV)
33
ROM
31
27
25
23
23
VC
BST CNT voltage [V]
21
VC – 1.0
VC + 1.0
AGC Characteristics Graph (Pin 29)
Output amplitude characteristics
1.2
Output amplitude [Vp-p]
27
25
1.0
0.8
0.6
0.4
0.2
0
VC – 1.0
ROM
29
Gain [dB]
Gain [dB]
29
21
VC – 1.0
80k
Boost characteristics (CAV)
33
31
40k
50k
60k
70k
FC CNT 2 external resistance [Ω]
VC – 0.5
VCA voltage [V]
VC
– 31 –
VC
BST CNT voltage [V]
VC + 1.0
CXA2557R
TE Characteristics Graphs (Pin 17)
Frequency response 1
Frequency response 2
50
50
40
RW
Gain [dB]
Gain [dB]
40
30
ROM
20
30
MODE 1 = M, H
20
MODE 1 = L
10
10
0
0
1k
10k
100k
Frequency [Hz]
1M
1k
TE CNT characteristics
TE BIAS characteristics
ROM
0.8
DC output voltage [V]
27
25
Gain [dB]
1M
1.2
31
29
10k
100k
Frequency [Hz]
23
21
19
17
15
0.4
0
–0.4
–0.8
13
11
VC – 1.0
VC
TE CNT voltage [V]
–1.2
VC – 1.0
VC + 1.0
VC
TE BIAS voltage [V]
VC + 1.0
∗ TE BIAS voltage; DC output voltage is 0V at VC.
– 32 –
CXA2557R
FE Characteristics Graphs (Pin 20)
Frequency response
FE CNT characteristics
26
40
24
RW
20
Gain [dB]
Gain [dB]
ROM
22
30
20
ROM
10
18
16
14
12
10
0
8
6
VC – 1.0
–10
1k
10k
100k
Frequency [Hz]
1M
FE BIAS characteristics
1.2
DC output voltage [V]
0.8
0.4
0
–0.4
–0.8
–1.2
VC – 1.0
VC
FE BIAS voltage [V]
VC + 1.0
∗ FE BIAS voltage; DC output voltage is 0V at VC.
– 33 –
VC
FE CNT voltage [V]
VC + 1.0
CXA2557R
AL Characteristics Graphs (Pins 12 and 13)
Frequency response (AL)
Frequency response (AL 1)
30
30
20
20
RW
Gain [dB]
Gain [dB]
RW
10
ROM
0
–10
10
ROM
0
–10
–20
–20
1k
10k
100k
Frequency [Hz]
1M
1k
1M
10k
100k
Frequency [Hz]
AL CNT characteristics
10
8
ROM
6
Gain [dB]
4
2
0
–2
–4
–6
–8
–10
VC – 1.0
VC
AL CNT voltage [V]
VC + 1.0
CE Characteristics Graph (Pin 16)
APC Characteristics Graph (Pin 1)
Frequency response
LD voltage vs. PD voltage
1.8
40
1.5
1.2
30
20
LD [V]
Gain [dB]
0.9
10
0.6
0.3
0
–0.3
0
–0.6
–0.9
–10
1k
10k
100k
Frequency [Hz]
–1.2
–1.78
1M
– 34 –
–1.76
–1.74
–1.72
PD [V]
–1.70
–1.68
CXA2557R
Package Outline
Unit: mm
48PIN LQFP (PLASTIC)
9.0 ± 0.2
∗
7.0 ± 0.1
36
S
25
13
0.5 ± 0.2
B
A
48
(8.0)
24
37
(0.22)
12
1
+ 0.05
0.127 – 0.02
0.5
+ 0.08
0.18 – 0.03
+ 0.2
1.5 – 0.1
0.13 M
0.1
S
0.5 ± 0.2
(0.18)
0° to 10°
DETAIL B:SOLDER
DETAIL A
0.18 ± 0.03
0.127 ± 0.04
+ 0.08
0.18 – 0.03
(0.127)
+0.05
0.127 – 0.02
0.1 ± 0.1
DETAIL B:PALLADIUM
NOTE: Dimension “∗” does not include mold protrusion.
PACKAGE STRUCTURE
PACKAGE MATERIAL
EPOXY RESIN
SONY CODE
LQFP-48P-L01
LEAD TREATMENT
SOLDER/PALLADIUM
PLATING
EIAJ CODE
LQFP048-P-0707
LEAD MATERIAL
42/COPPER ALLOY
PACKAGE MASS
0.2g
JEDEC CODE
– 35 –