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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 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 48 pin LQFP (Plastic)
Structure Bipolar silicon monolithic IC Absolute Maximum Ratings (Ta = 25C) * Supply voltage VCC - GND 7 V * Storage temperature Tstg -65 to +150 C * Power consumption PD 400 mW Operating Conditions (Ta = 25C) * Supply voltage VCC - GND 3.5 to 5.5 * Operating temperature Topr -20 to +75
V C
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 RF SW DC RW SW DC RF DC SUM AMP RF DC AMP RF DC VCA VCA CNT RF AC SUM AMP RF DC OUT 48 RF AC OUT RW SW AC RW SW AC RW SW 1 RW SW 1 26 RF DC OUT 32 RW SW
RW SW DC A3 B4 C5 D6
RW SW AC
RF AC VCA
VCA CNT
FE AMP RW SW 1 E8 F9
FE VCA FE VCA CNT TE RW AMP
FE BIAS
20 FE 19 FE BIAS 38 FE CNT
TE AMP
TE VCA
TE BIAS
17 TE 18 TE BIAS
TE MODE TE 1 10 AL IN 11 AL AMP
RW SW 1
TE VCA CNT
39 TE CNT 40 AL CNT
AL VCA
AL DRV
12 AL 13 AL 1
RW SW 1
14 CE IN 15 CE 1
RF DC OUT
CE AMP
CE DRV
16 CE
LPF 1
LPF 2
LPF 3
AMP
HALF MIRR CNT 37 MIRR CNT PEAK HOLD
ADJ
COMP
25 MIRR 24 MIRR BIAS
LPF
23 PH C
PBH CNT 21
PBH CNT
BOTTOM HOLD PEAK HOLD 1 PEAK HOLD 2
22 BH C 33 AGC SW
HPF
AMP
COMP
VCA CNT 41 VCA 46 HOLD C MODE 1
EQ IN 47 FC CNT 1 44 FC CNT 2 45 FC H CNT 43 MODE 1 34 MODE 2 35 BST CNT 42 BOOST CNT FC CNT
LPF 1
DELAY
MIXER
LPF 2
LPF 3
LPF 4
AMP
29 RFO 1 30 RFO 2
HPF MODE CNT
BOOST APC AMP
2 1
PD LD
APC ON
36 APC ON
7
27
28
31
VC IN
GND
-2-
VCC
VC
CXA2557R
Pin Configuration
APC ON
MODE 2
MODE 1
AGC SW
RW SW
RFO 2
RFO 1
RF DC OUT
26
VC IN
VCC
36 MIRR CNT 37 FE CNT 38 TE CNT 39 AL CNT 40 VCA 41 BST CNT 42 FC H CNT 43 FC CNT 1 44 FC CNT 2 45 HOLD C 46 EQ IN 47 RF AC OUT 48
35
34
33
32
31
VC
30
29
28
27
25 24 MIRR BIAS 23 PH C 22 BH C 21 PBH CNT 20 FE 19 FE BIAS 18 TE BIAS 17 TE
MIRR
16 CE 15 CE 1 14 CE IN 13 AL 1 12
1
2
3
4
5
6
7
8
9
10
11
TE 1
-3-
AL IN
GND
LD
PD
AL
B
C
D
E
A
F
CXA2557R
Pin Description Pin No. Symbol I/O Equivalent circuit Description
10k
1
LD
O
1 124
APC amplifier output.
2
PD
I
2
124
55k 20k 20k
APC amplifier input.
3
40k 40k 40k 40k 40k 10k 45k
4
40k 40k 40k
3 4 5 6
A B C D
I I I I
5
Inputs of RF summing amplifier and focus error amplifier. When using a laser coupler: A + C = PD1 B + D = PD2
130k 40k 40k 40k 40k 180k 180k 180k 180k 130k 130k 130k
6
7
GND
--
Ground.
-4-
CXA2557R
Pin No.
Symbol
I/O
Equivalent circuit
Description
124
124 9
8 9
E F
I I
8
Tracking error amplifier inputs.
124 VCA RW 10
10
TE 1
O
Tracking error amplifier inverted output.
20k 124
11
AL IN
I
11 20k 9k 40k 6.2k 13.3k
Alignment amplifier input.
15k
124 12 15k 7.5k
12
AL
O
Alignment amplifier non-inverted output.
124
13
AL 1
O
45k 34k
13
Alignment amplifier inverted output.
14
CE IN
I
14
124
124 15
Center error amplifier input.
15
CE 1
O
20k 124 16
Center error amplifier inverted output.
16
CE
O
Center error drive amplifier inverted output.
-5-
CXA2557R
Pin No.
Symbol
I/O
Equivalent circuit
Description
17
TE
O
VCA
40k
124 17
Tracking error amplifier noninverted output.
50k
18
TE BIAS
I
200k
18
Tracking error amplifier bias adjustment.
19
FE BIAS
I
VCA
300k 300k 124 20 107k 375k
Focus error amplifier bias adjustment.
20
FE
O
19
Focus error amplifier noninverted output.
21
PBH CNT
I
50k 21
Mirror circuit peak hold and bottom hold time constant setting input.
22
BC C
I
500 22 40k 20k
Connects the capacitor that sets mirror circuit bottom hold time constant.
40k
23
PH C
I
23 500
Connects the capacitor that sets mirror circuit peak hold time constant.
20k
24
MIRR BIAS
I
35k 24 3k 50k
20k 2.7k
Mirror circuit bias adjustment.
-6-
CXA2557R
Pin No.
Symbol
I/O
Equivalent circuit
Description
8k
25
MIRR
O
7.7k 200k
124 25 2k
Mirror comparator output.
20k
26
RF DC OUT
O
26 20k 20k
RF DC amplifier output. Eye pattern check point.
27
VC IN
I
--
Reference voltage input.
28
VC
O
150 28 150
(VCC + GND)/2 voltage output.
29
RFO 1
O
3k
3k
3k
3k 29
RF AC amplifier output.
280
280 30
30
RFO 2
O
RF AC amplifier buffer switch output. ON when Pin 34 is connected to GND. Power supply.
31
VCC
--
--
-7-
CXA2557R
Pin No.
Symbol
I/O
Equivalent circuit
Description
15k 15k
40k
80k
20k
32
RW SW
I
20k
20k
60k
124 32
CD-ROM/RW switching input. RW when connected to VCC, ROM when connected to GND.
15k 15k
40k
80k
33
AGC SW
I
15k 15k
20k
60k 33
AGC/VCA switching input. AGC when connected to VCC, VCA when connected to GND.
Double-speed mode switching pins.
124 34 15k 80k 40k 15k
MODE 1 MODE 2 L M X L M H X
fc xn x 2n x 4n x 6n xN
80k 15k
34
MODE 1
I
H
40k 15k
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. Pin 34 also serves as switching pin for the tracking error amplifier cut-off frequency and RFO2 output ON/OFF switching pin. MODE 1 MODE 2 20kHz L M H 250kHz fc ON OFF
80k 15k 40k 15k
80k 15k
35
MODE 2
I
35
40k 15k
L = GND, M = VC, H = VCC -8-
CXA2557R
Pin No.
Symbol
I/O
Equivalent circuit
Description
124 36 100k
40k 10k
40k
36
APC ON
I
80k
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).
80k 40k
20k 10k
37
MIRR CNT
I
37 12k 12k
Mirror circuit LPF cut-off frequency setting input.
38
FE CNT
I
38 21k 21k
Focus error amplifier gain adjustment input.
39
39
TE CNT
I
21k 21k
Tracking error amplifier gain adjustment input.
40
AL CNT
I
40 21k 21k
Alignment amplifier gain adjustment input.
-9-
CXA2557R
Pin No.
Symbol
I/O
Equivalent circuit
Description
80k
41
VCA
I
41 80k 40k 26.7k 80k 40k
RF DC and RF AC amplifier gain adjustment input. AGC circuit target voltage input when AGC SW is ON.
42
BST CNT
20k
I
42
Equalizer circuit boost amount adjustment input.
43
FC H CNT
I
20k 43 20k
Cut-off frequency N adjustment input when Pin 34 is High.
5k 5k 5k
15k
44
FC CNT 1
124
I
44
Connects the external resistor that sets cut-off frequency n when Pin 34 is Low or Medium.
5k 5k 5k
15k
45
FE CNT 2
I
124 45
Connects the external resistor that sets cut-off frequency N when Pin 34 is High.
46
46
HOLD C
I
Connects the capacitor that sets AGC time constant.
- 10 -
CXA2557R
Pin No.
Symbol
I/O
Equivalent circuit
Description
1.1k
1.1k
47
EQ IN
I
47 5k
1.3k 5k
Equalizer circuit input.
3k
3k
48
RF AC OUT
O
48
RF AC summing amplifier noninverted output.
- 11 -
Electrical Characteristics
Bias conditions (V) SW conditions E1 E2 Min. -20.0 43.0 -85.0 64.0 -64.0 0.0 20.0 85.0 -43.0 Typ. Max. 28 31 7 26 S16 S20-b 48 S16 20 S16 17 S16 12 S16 13 S16 16 S2, S3, S4, S5 S2, S3, S4, S5, S25 S2, S3, S4, S5, S25 S2, S3, S4, S5, S16 S2, S3, S4, S5, S16, S25 S2, S3, S4, S5, S16, S25 1.0 -1.0 1.0 -1.0 100kHz 18mVp-p 100kHz 80mVp-p 26 GRFDV1 (TS) - GRFD1 GRFDV2 (TS) - GRFD1 GRFD2 (TS) - GRFD1 GRFDV3 (TS) - GRFD2 (TS)
GRFDV4
(Ta = 25C, VCC = 1.9V, GND = VC, VEE = -1.9V)
Input Output IC pin No. Ratings Unit mA mA mA mV mV -68.0 52.0 -215.0 -135.0 -210.0 -130.0 -57.0 -60.0 -210.0 -210.0 -10.0 -10.0 -110.0 -110.0 -30.0 13.8 5.0 -11.0 10.0 5.0 (TS) - GRFD2 (TS) -11.0 23.0 20.0 -80.0 -80.0 50.0 50.0 -50.0 -50.0 20.0 16.8 8.0 -8.0 13.0 8.0 -8.0 172.0 -55.0 -50.0 103.0 100.0 50.0 50.0 110.0 110.0 10.0 10.0 70.0 19.8 11.0 -5.0 16.0 11.0 -5.0 mV mV mV mV mV mV mV mV mV mV mV mV dB dB dB dB dB
CXA2557R
No.
Measurement item
1
Output voltage
VVCB
2
Current consumption
ICC
4
Current consump VC -tion
3
Current consumption
IEE
Output offset voltage 1 VRFD1
-680.0 -560.0 -440.0 -640.0 -520.0 -400.0
6
RF DC
5
Output offset voltage 2 VRFD2
Output offset voltage 3 VRFD3
7
Output offset voltage 1 VRFA1
10
FE
9
RF AC
8
Output offset voltage 2 VRFA2
Output offset voltage 1 VFE1
Output offset voltage 2 VFE2
12
Offset voltage
15
AL
CE
RF DC
- 12 -
TE
11
Output offset voltage 1 VTE1
Output offset voltage 2 VTE2
13
Output offset voltage 1 VAL1
14
Output offset voltage 2 VAL2
Output offset voltage 3 VAL3
16
Output offset voltage 4 VAL4
17
Output offset voltage
VCE
18
Voltage gain 1
GRFD1
19
VCA gain 1
GRFDV1
20
VCA gain 2
GRFDV2
21
Voltage gain 2
GRFD2
22
VCA gain 3
GRFDV3
23
VCA gain 4
GRFDV4
dB
(Ta = 25C, VCC = 1.9V, GND = VC, VEE = -1.9V)
Bias conditions (V) SW conditions E1 E2 Min. 990.0 -- 48 0.7 VRFA1 (TS) - GRFA1 6.0 -10.0 8.1 5.5 -9.5 260.0 VRFA2 (TS) - GRFA1 100kHz 38mVp-p 1.0 -1.0 1.0V DC -1.0V DC 1kHz 189mVp-p 20 GRFA2 (TS) - GRFA1 VRFA3 (TS) - GRFA2 (TS) VRFA4 (TS) - GRFD2 (TS) 2.7 8.0 -8.0 10.1 7.5 -7.5 370.0 1100.0 -- Typ. Max. 1.0V DC -1.0V DC 100kHz 170mVp-p 1.0 -1.0 26 S2, S3, S4, S5 S2, S3, S4, S5 S2, S3, S4, S5 S2, S3, S4, S5, S25 S2, S3, S4, S5, S25 S2, S3, S4, S5, S16 S2, S3, S4, S5, S16, S25 S2, S3, S4, S5, S16, S25 S2, S3, S4, S5 S2, S3, S4, S5 S2, S4 S3, S5 S3, S5, S22 S3, S5, S22 S3, S5 S2, S4, S16 S3, S5, S16 S3, S5, S16, S22 S3, S5, S16, S22 S11 S11 S3, S5 S3, S5 1.0 -1.0 1.9V DC -1.9V DC 1.0 -1.0 -1.0 25kHz 189mVp-p 1kHz 42mVp-p 1.0 GFEV1 (TS) - GFE2 GFEV2 (TS) - GFE2 FFE1 (TS) - GFE2 GFE3 (TS) - GFE1 GFE4 (TS) - GFE2 GFEV3 (TS) - GFE4 (TS) GFEV4 (TS) - GFE4 (TS) BFE1 (TS) - VFE1 BFE2 (TS) - VFE1 Input Output IC pin No. Ratings Unit mV
No.
Measurement item
24
Output voltage High
VRFDH
RF DC
25
Output voltage Low
VRFDL
-1790.0 -1680.0 mV 4.7 10.0 -6.0 12.1 9.5 -5.5 480.0 dB dB dB dB dB dB mV
26
Voltage gain 1
GRFA1
27
VCA gain 1
VRFA1
28
VCA gain 2
VRFA2
29
Voltage gain 2
GRFA2
RF AC
30
VCA gain 3
VRFA3
31
VCA gain 4
VRFA4
32
Output voltage High
VRFAH1
33
Output voltage Low
VRFAL1
-730.0 -620.0 -510.0 13.0 13.0 5.0 -11.0 -3.0 10.0 10.0 5.0 -11.0 16.0 16.0 8.0 -8.0 -- 13.0 13.0 8.0 -8.0 19.0 19.0 11.0 -5.0 -- 16.0 16.0 11.0 -5.0
mV dB dB dB dB dB dB dB dB dB -1290.0 -1180.0 -1070.0 mV 1070.0 1180.0 1290.0 1660.0 1770.0 -- -- mV mV
CXA2557R
FE
- 13 -
34
Voltage gain 1
GFE1
35
Voltage gain 2
GFE2
36
VCA gain 1
GFEV1
37
VCA gain 2
GFEV2
38
Frequency response
FFE
39
Voltage gain 3
GFE3
40
Voltage gain 4
GFE4
41
VCA gain 3
GFEV3
42
VCA gain 4
GFEV4
43
Bias characteristics 1 BFE1
44
Bias characteristics 2 BFE2
45
Output voltage High
VFEH
46
Output voltage Low
VFEL
-1680.0 -1570.0 mV
(Ta = 25C, VCC = 1.9V, GND = VC, VEE = -1.9V)
Bias conditions (V) SW conditions E1 Min. 17.9 17.9 1.0 4.8 -12.1 -3.0 -3.0 10.0 10.0 4.9 -12.2 BTE1 (TS) - VTE1 BTE2 (TS) - VTE1 1.9V DC -1.9V DC 1kHz 700mVp-p 12 13 1.0 -1.0 30kHz 700mVp-p 12 13 1kHz 156mVp-p 12 13 1.0 -1.0 12 12 GALV1 (TS) - GAL1 GALV2 (TS) - GAL1 FAL1 (TS) - GAL1 FAL2 (TS) - GAL3 GAL3 (TS) - GAL1 GAL4 (TS) - GAL3 GALV3 (TS) - GAL3 (TS) GALV4 (TS) - GAL3 (TS) -1.0 250kHz 107mVp-p 20kHz 107mVp-p 1kHz 20mVp-p GTE3 (TS) - GTE1 GTE4 (TS) - GTE2 1.0 -1.0 1.0 -1.0 GTEV3 (TS) - GTE3 (TE) GTEV4 (TS) - GTE3 (TE) FTE2 (TS) - GTE1 (TE) FTE1 (TS) - GTE1 (TE) GTEV2 (TS) - GTE1 GTEV1 (TS) - GTE1 8.3 -8.6 -- -- 13.0 13.0 8.4 -8.7 20.9 20.9 Typ. S7, S18-c 1kHz 107mVp-p S6, S18-c S7, S18-c, S23 S7, S18-c, S23 S7, S18-c S7 S7, S16, S18-c S6, S16, S18-c S7, S16, S18-c, S23 S7, S16, S18-c, S23 S10, S18-c S10, S18-c S7, S18-c S7, S18-c S8 S8 S8, S24 S8, S24 S8 S8 S8, S16 S8, S16 S8, S16, S24 S8, S16, S24 17 E2 Max. 23.9 23.9 11.8 -5.1 -- -- 16.0 16.0 11.9 -5.2 -890.0 -780.0 -670.0 670.0 780.0 1550.0 1660.0 -- -3.6 -3.6 4.3 -11.9 -2.0 -2.0 10.0 10.0 4.5 -11.9 890.0 -- Input Output IC pin No. Ratings Unit dB dB dB dB dB dB dB dB dB dB mV mV mV -1760.0 -1650.0 mV -0.6 -0.6 8.0 -8.4 -- -- 13.0 13.0 8.0 -8.4 2.4 2.4 11.5 -4.9 -- -- 16.0 16.0 11.5 -4.9 dB dB dB dB dB dB dB dB dB dB
No.
Measurement item
47
Voltage gain 1
GTE1
48
Voltage gain 2
GTE2
49
VCA gain 1
GTEV1
50
VCA gain 2
GTEV2
51
Frequency response 1 FTE1
52
Frequency response 2 FTE2
TE
53
Voltage gain 3
GTE3
54
Voltage gain 4
GTE4
55
VCA gain 3
GTEV3
56
VCA gain 4
GTEV4
66
AL
- 14 -
57
Bias characteristics 1 BTE1
58
Bias characteristics 2 BTE2
59
Output voltage High
VTEH1
60
Output voltage Low
VTEL1
61
Voltage gain 1
GAL1
62
Voltage gain 2
GAL2
63
VCA gain 1
GALV1
64
VCA gain 2
GALV2
65
Frequency response 1 FAL1
Frequency response 2 FAL2
67
Voltage gain 3
GAL3
68
Voltage gain 4
GAL4
69
VCA gain 3
GALV3
CXA2557R
70
VCA gain 4
GALV4
(Ta = 25C, VCC = 1.9V, GND = VC, VEE = -1.9V)
Bias conditions (V) SW conditions E1 Min. 1580.0 1690.0 -- 13 -- -- Typ. Max. S8 1.9V DC -1.9V DC 1.9V DC -1.9V DC 1kHz 260mVp-p 30kHz 260mVp-p 1.9V DC -1.9V DC adjust Input voltage VAPCIN + 100mV VAPCIN - 100mV VAPCIN 1kHz 45mVp-p 29 30 1.9V DC -1.9V DC 1.9V DC -1.9V DC 100kHz 40mVp-p -1.0 -1.0 -1.0 100kHz 100mVp-p 29 30 29 1 Output voltage = 0V FCE (TS) - GCE 16 17.0 -3.0 S8 S8 S8 S9 S9 S9 S9 S1 S1 S1 S1, S20-c S29 S29 S29 S29 S29 S29 S2, S3, S4, S5 S2, S3, S4, S5, S17, S25 S2, S3, S4, S5, S17, S25 S2, S3, S4, S5, S25 12 E2 Input Output IC pin No. Ratings Unit mV
No.
Measurement item
71
Output voltage High 1 VALH1
73
AL
72
Output voltage Low 1 VALL1
-1680.0 -1540.0 mV -1720.0 -1580.0 mV -- 20.0 -- 23.0 -- mV dB dB
Output voltage High 2 VALH2
74
Output voltage Low 2 VALL2
1570.0 1690.0
75
Voltage gain
GCE
CE
76
Frequency response
FCE
77
Output voltage High
VCEH
1680.0 1790.0 --
--
mV -1580.0 -1090.0 mV -1780.0 -1730.0 -1680.0 mV 1650.0 1760.0 1870.0 -1180.0 -1070.0 -960.0 1700.0 1800.0 16.5 15.6 240.0 19.0 18.1 560.0 -- 21.5 20.6 880.0 -1410.0 -1130.0 -890.0 590.0 840.0 1090.0 -1210.0 -880.0 -590.0 19.0 26.5 18.0 11.5 22.0 29.5 21.0 14.5 25.0 32.5 24.0 17.5 mV mV mV dB dB mV mV mV mV dB dB dB dB
CXA2557R
78
Output voltage Low
VCEL
79
Input voltage
VAPCIN
APC
80
Output voltage 1
VAPC1
86
EQ
AGC
- 15 -
81
Output voltage 2
VAPC2
82
Output voltage 3
VAPC3
83
Voltage gain 1
GEQ1
84
Voltage gain 2
GEQ2
85
Output voltage High 1 VEQH1
Output voltage Low 1 VEQL1
87
Output voltage High 2 VEQH2
88
Output voltage Low 2 VEQL2
89
Voltage gain 1
VAGC1
90
Voltage gain 2
VAGC2
91
Voltage gain 3
VAGC3
92
Voltage gain 4
VAGC4
(Ta = 25C, VCC = 1.9V, GND = VC, VEE = -1.9V)
Bias conditions (V) SW conditions E1 Min. 1600.0 1710.0 -- 30kHz 100mVp-p 11.3 See the figure below. 0.1 0.1 10.6 10.7 16.6 16.7 22.6 22.7 s s 10.0 16.0 17.3 -- Typ. Max. S12, S21-b 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 0.1 0.1 -1.0 1.0 25 E2 Input Output IC pin No. Ratings Unit mV
No.
Measurement item
93
Bias characteristics 1 BMIRR1
94
Bias characteristics 2 BMIRR2
-1585.0 -1475.0 mV 22.0 23.3 s s
96
MIRR
95
MIRR frequency response 1 FMIRR1
MIRR frequency response 2 FMIRR2
97
MIRR frequency response 3 FMIRR3
98
MIRR frequency response 4 FMIRR4
MIRR frequency response measurement (T475 to T478)
- 16 -
+1.0V GND -1.0V
T475
T476
T477
T478
T475 measurement value + T476 measurement value = 33.3s. T477 measurement value + T478 measurement value = 33.3s.
CXA2557R
CXA2557R
Electrical Characteristics Measurement Circuit
VCC VCC S29
VCC c
VEE b a c S20 b a c S19 36 S18 b a c b a S17 VCC VEE VCC S16 1 10k VEE VCC 10k 1 1k S15 10k VEE VCC 33 /6.3V 33 /6.3V VEE VEE VEE VCC VEE VCC VCC
1k 48 47
1000p
0.1
60k 40k 20k S27 S26 S25 S24 S23 S22
S21
46
45
44
43
42
41
40
39
38
37
RF AC OUT
HOLD C
VCA
FC CNT 1
BST CNT
TE CNT
EQ IN
FC CNT 2
AL CNT
1 S1 S2 3 S3 4 S4 S5 6 VEE S6 S7 33k S8 75k 33k 75k 7 8 9
LD
FC H CNT
FE CNT
2 PD A B
AGC SW 33 RW SW 32 VCC 31 RFO 2 30 RFO 1 29 VC 28 VC IN 27
5C D GND E F
10 TE 1
PBH CNT
11 AL IN
RF DC OUT 26
MIRR CNT
APC ON MODE 2 35 MODE 1 34
TE BIAS
FE BIAS
10k
CE IN
AL 1
13
14
15
16
17
18
19
FE
20
21
22
23
PH C
CE
10k 10k
22k10k S9 10k S10
0.1 0.1 10k S11 S13 S12
SG
E1
MIRR BIAS
TE
BH C
CE 1
12 AL
MIRR 25
10k
24
E2
- 17 -
CXA2557R
Description of Functions RF DC
RW SW 32 A3 B4 C5 D6 40k 40k 40k 40k VC 40k 40k 40k 40k 45k Gain : ROM = 0dB RW = 13dB Gain : 12dB Gain : 5 8dB RW L : ROM H : RW VC L : ON VCA Non-inverted M : OFF ROM 10k 26 RF DC OUT 36 APC ON 40k 10k VCA CNT AGC L : VCA H : AGC 41 VCA AGC SW 33
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
RW SW 32 A3 B4 C5 D6 13dB RW L : ROM H : RW ROM
RF AC OUT 48 VCA Non-inverted 47
EQ IN
Non-inverted EQ 29 RFO 1 30 RFO 2 AGC VCA AGC L : ON M : OFF H : OFF 34 MODE 1
L : VCA H : AGC VCA CNT
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
VCC EQ fc control 20k BST CNT 42 FC CNT 2 45 43 FC H CNT 44 FC CNT 1 VCC
L : CLV M : CLV H : CAV EQ IN 47 HPF Boost Filter fc LPF 1 LPF 2
CAV CLV
CLV MODE
35 MODE 2 34 MODE 1
29 RFO 1 LPF 4 L : ON M : OFF H : OFF 30 RFO 2
LPF 3
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 CLV CAV 0.5N N 1.5N f 2n 4n 6n
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 40k for the external resistor connected to Pin 44, and 30k for the external resistor connected to Pin 45. - 20 -
CXA2557R
Pin Settings and Cut-off Frequency MODE 1 (Pin 34) L MODE 2 (Pin 35) X L M M H VC - 1V to VC to VC + 1V -- FC H CNT (Pin 43) fc n 2n 4n 6n 0.5N to N to 1.5N CLV mode
H
X
CAV
AGC
HOLD C 46 VCA 41 AGC SW 33 L : VCA H : AGC VCA CNT AGC
VCA RFO 1 LPF fc = 50kHz Peak Hold comp
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 VC 375k FE CNT 38 FE BIAS 19
130k A3 B4 C5 D6 180k 180k 180k 180k L : ROM H : RW RW VCA Non-inverted ROM
300k 300k 20 VC 107k FE
40k 40k 40k 40k 130k
VC
Gain : ROM = 3dB RW = 16dB
Gain : 13 8dB
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 -
CXA2557R
TE
MODE 1 34 TE 1 10 F 9 8 E 10k VC RW VC VCA Non-inverted L : ON M : OFF H : OFF 45k 40k ROM 50k 40k VC 200k 17 TE RW SW 32 TE CNT 40 TE BIAS 18
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 -
CXA2557R
AL
RW SW 32 9k 20k AL IN 11 VC 20k RW L : ROM H : RW VCA Non-inverted 13 AL 1 10k ROM 10k 12 AL AL CNT 40
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
AL or AL 1 CE IN TE 14 20k
90k
16 15 CE 1 Gain : 7dB Gain : 13dB
CE
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 + TE): straight optical path laser coupler CE = GCE * (AL 1 + TE): folded optical path laser coupler
MIRR
BH C PH C 22 23 MIRR BIAS 24
RF DC
LPF
Peak Bottom Hold
Half
25 MIRR
37 MIRR CNT
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 28 40k VC VC
The center voltage VC = (VCC + GND)/2 is output from Pin 28 (VC). The maximum output current is about 3mA.
APC
VCC
PD 2
56k 1 1k 56k
100 LD
10
10k
10k
55k
10k
100 500 1
1.25V
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 3 spots
EQ Boost Control
RF VCA/AGC Control
TE VCA Control
VC VCC VCC 0.1
EQ fc Control
FE VCA Control
AL VCA Control
VCC 1 30k 40k 20k
47k
48
47
46
45
44
43
42
41
40
39
38
37
FC CNT 1
BST CNT
FC CNT 2
RF AC OUT
FC H CNT
HOLD C
FE CNT
VCA
Pickups LD PD A B C D GND VC 33k F 33k 75k 9F 75k 1 LD 2 PD 3A 4B 5C 6D
TE CNT
EQ IN
AL CNT
MIRR CNT
36 APC ON MODE 2 35 MODE 1 34 AGC SW 33 RW SW 32 VCC 31 RFO 2 30 RFO 1 29 VC 28
APC On/Off SW EQ fc EQ fc, TE fc RF VCA/AGC SW ROM/RW SW VCC RF AC Out 2 10 0.1 RF AC Out 1 VCC 0.1 RF DC Out MIRR Out
7 GND 8E
E
10 TE 1
VC IN 27
TE BIAS
PBH CNT
11 AL IN
RF DC OUT 26
10
FE BIAS
CE IN
13
TE
14
15
16
17
18
19
BH C
20
21
22
23
VCC 47k VCC TE Out VCC 47k 47k FE Out
0.1 0.1
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 -
MIRR BIAS
24
CE 1
AL 1
FE
PH C
12 AL
MIRR 25
CE
CXA2557R
Application Circuit Laser coupler (straight optical path type)
EQ Boost Control
RF VCA/AGC Control
VC VCC VCC 0.1
TE VCA Control
EQ fc Control
FE VCA Control
VCC 47k 38 37
1 30k 40k 20k
48
47
46
45
44
43
42
41
40
AL VCA Control
39
RF AC OUT
FC H CNT
HOLD C
FE CNT
VCA
FC CNT 1
BST CNT
EQ IN
FC CNT 2
AL CNT
Pickups LD PD PD 1 PD 2 1 LD 2 PD 3A 4B 5C GND VC 33k F 33k 75k AL 9F 75k 6D
TE CNT
MIRR CNT
36 APC ON MODE 2 35 MODE 1 34 AGC SW 33 RW SW 32 VCC 31 RFO 2 30 RFO 1 29 VC 28
APC On/Off SW EQ fc EQ fc, TE fc RF VCA/AGC SW ROM/RW SW VCC RF AC Out 2 10 0.1 RF AC Out 1 VCC 0.1 RF DC Out MIRR Out
7 GND 8E
E
10 TE 1
VC IN 27
TE BIAS
PBH CNT
11 AL IN
RF DC OUT 26
10
FE BIAS
CE IN
BH C
13
14
15
16
17
18
19
20
21
22
23
PH C
VCC
CE
TE
20k 22k 20k
VCC 47k VCC 47k VCC 47k
0.1 0.1
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.
CE Out
TE Out
- 28 -
FE Out
MIRR BIAS
24 47k
CE 1
AL 1
12 AL
MIRR 25
FE
CXA2557R
Application Circuit Laser coupler (folded optical path type)
EQ Boost Control
RF VCA/AGC Control
VC VCC VCC 0.1
TE VCA Control
EQ fc Control
FE VCA Control
VCC 47k 38 37
1 30k 40k 20k
48
47
46
45
44
43
42
41
40
AL VCA Control
39
RF AC OUT
FC H CNT
HOLD C
FE CNT
VCA
FC CNT 1
BST CNT
EQ IN
FC CNT 2
AL CNT
Pickups LD PD PD 1 PD 2 1 LD 2 PD 3A 4B 5C GND VC 33k F 33k 75k AL 9F 75k 6D
TE CNT
MIRR CNT
36 APC ON MODE 2 35 MODE 1 34 AGC SW 33 RW SW 32 VCC 31 RFO 2 30 RFO 1 29 VC 28
APC On/Off SW EQ fc EQ fc, TE fc RF VCA/AGC SW ROM/RW SW VCC RF AC Out 2 10 0.1 RF AC Out 1 VCC 0.1 RF DC Out MIRR Out
7 GND 8E
E
10 TE 1
VC IN 27
TE BIAS
PBH CNT
11 AL IN
RF DC OUT 26
10
FE BIAS
CE IN
BH C
13
14
15
16
17
18
19
20
21
22
23
PH C
VCC
CE
TE
20k 22k 20k
VCC 47k VCC 47k VCC 47k
0.1 0.1
TE Out
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.
CE Out
- 29 -
FE Out
MIRR BIAS
24 47k
CE 1
AL 1
12 AL
MIRR 25
FE
CXA2557R
Example of Representative Characteristics (VC voltage reference)
RF DC Characteristics Graphs (Pin 26)
Frequency response
40 RW 30 27 25 23 21 ROM
VCA characteristics
Gain [dB]
20 ROM 10
Gain [dB]
1M Frequency [Hz] 10M
19 17 15 13
0
11 9
-10 100k
7 VC - 1.0
VC VCA voltage [V]
VC + 1.0
RF AC Characteristics Graphs (Pin 29)
Frequency response
50 31 29 40 RW 27 25 ROM
VCA characteristics
Gain [dB]
Gain [dB]
100k 1M Frequency [Hz] 10M
30 ROM 20 MODE 1, 2 = L, L FC CNT 1 = 40k
23 21 19 17
10
15 13
0 10k
11 VC - 1.0
VC VCA voltage [V]
VC + 1.0
EQ characteristics (CLV)
50 FC CNT 1 = 40k 40 M, L M, M 40 50
EQ characteristics (CAV)
VC + 1.0V
Gain [dB]
Gain [dB]
30
L, L M, H
30 VC - 1.0V 20 MODE 1, 2 = H, L FC CNT 2 = 30k
VC
20
10
10
0 100k
1M Frequency [Hz]
10M
0 100k
1M Frequency [Hz]
10M
- 30 -
CXA2557R
Cut-off frequency response 1
1.6M 27M
Cut-off frequency response 2
1.2M 1M 800k 600k 400k 40k
N - Cut-off frequency [Hz]
50k 60k 70k 80k 90k FC CNT 1 external resistance [] 100k
n - Cut-off frequency [Hz]
1.4M
23M 19M 15M 11M 9M 7M 30k
40k 50k 60k 70k FC CNT 2 external resistance []
80k
Boost characteristics (CLV)
33 31 29 ROM 33 31 29
Boost characteristics (CAV)
ROM
Gain [dB]
27 25 23 21 VC - 1.0
Gain [dB]
VC BST CNT voltage [V] VC + 1.0
27 25 23 21 VC - 1.0
VC BST CNT voltage [V]
VC + 1.0
AGC Characteristics Graph (Pin 29)
Output amplitude characteristics
1.2 1.0 0.8 0.6 0.4 0.2 0 VC - 1.0
Output amplitude [Vp-p]
VC - 0.5 VCA voltage [V]
VC
- 31 -
CXA2557R
TE Characteristics Graphs (Pin 17)
Frequency response 1
50 50
Frequency response 2
40
RW
40
Gain [dB]
30 ROM 20
Gain [dB]
30 MODE 1 = M, H 20 MODE 1 = L
10
10
0 1k 10k 100k Frequency [Hz] 1M
0 1k 10k 100k Frequency [Hz] 1M
TE CNT characteristics
31 29 27 25 ROM 1.2 0.8
TE BIAS characteristics
DC output voltage [V]
VC TE CNT voltage [V] VC + 1.0
0.4 0 -0.4 -0.8 -1.2 VC - 1.0
Gain [dB]
23 21 19 17 15 13 11 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
40 26 24 30 RW 22 20 ROM
FE CNT characteristics
Gain [dB]
Gain [dB]
10k 100k Frequency [Hz] 1M
20 ROM 10
18 16 14 12
0
10 8
-10 1k
6 VC - 1.0
VC FE CNT voltage [V]
VC + 1.0
FE BIAS characteristics
1.2 0.8
DC output voltage [V]
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 -
CXA2557R
AL Characteristics Graphs (Pins 12 and 13)
Frequency response (AL)
30 30
Frequency response (AL 1)
20 RW
20 RW
Gain [dB]
10 ROM 0
Gain [dB]
10 ROM 0
-10
-10
-20 1k 10k 100k Frequency [Hz] 1M
-20 1k 10k 100k Frequency [Hz] 1M
AL CNT characteristics
10 8 6 4 ROM
Gain [dB]
2 0 -2 -4 -6 -8 -10 VC - 1.0 VC AL CNT voltage [V] VC + 1.0
CE Characteristics Graph (Pin 16)
Frequency response
40
APC Characteristics Graph (Pin 1)
LD voltage vs. PD voltage
1.8 1.5
30
1.2 0.9
Gain [dB]
LD [V]
1k 10k 100k Frequency [Hz] 1M
20
0.6 0.3 0 -0.3
10
0
-0.6 -0.9
-10
-1.2 -1.78
-1.76
-1.74 -1.72 PD [V]
-1.70
-1.68
- 34 -
CXA2557R
Package Outline
Unit: mm
48PIN LQFP (PLASTIC)
9.0 0.2 36 37 7.0 0.1 25 24 S
(8.0)
A 48 1 0.5 + 0.08 0.18 - 0.03 + 0.2 1.5 - 0.1 12 13
B
(0.22)
+ 0.05 0.127 - 0.02 0.13 M
0.1 0.1 0.1
0.5 0.2
S
(0.127) +0.05 0.127 - 0.02
(0.18)
0.18 0.03
0 to 10
0.5 0.2
DETAIL B:SOLDER DETAIL A
DETAIL B:PALLADIUM
NOTE: Dimension "" does not include mold protrusion.
PACKAGE STRUCTURE
PACKAGE MATERIAL SONY CODE EIAJ CODE JEDEC CODE LQFP-48P-L01 LQFP048-P-0707 LEAD TREATMENT LEAD MATERIAL PACKAGE MASS EPOXY RESIN SOLDER/PALLADIUM PLATING 42/COPPER ALLOY 0.2g
- 35 -
0.127 0.04
+ 0.08 0.18 - 0.03

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