CXA2697ER
5-Channel 2-LD Driver for Optical Disc Drive
Description
The CXA2697ER is a laser driver IC corresponded
to DVD
×12
and capable of driving two high output
lasers (CD/DVD) for writable optical discs.
Features
•
CD write channel maximum drive current: 300mA
(V
CC
= 3V, V
CC
_LD = 4.5V, VOP = 2.5V)
•
CD total maximum drive current: 370mA
(V
CC
= 3.3V, V
CC
_LD = 5V, VOP = 2.5V)
•
DVD write channel maximum drive current: 270mA
(V
CC
= 3V, V
CC
_LD = 4.5V, VOP = 3V)
•
DVD total maximum drive current: 360mA
(V
CC
= 3.3V, V
CC
_LD = 5V, VOP = 3V)
•
Capable of generating five-value recording
•
•
•
•
•
•
•
•
•
waveform through control of five channels
Rise/Fall times = 1ns
Read Channel:
×125
Write Channel:
×470
Read Channel has extensive low-noise design
1.5nA/√Hz (@20MHz, I
LD
= 35mA, Imod = 20mAp-p)
High frequency modulator circuit
Frequency variable range: 200 to 600MHz
Modulator amplitude can be set separately for CD
and DVD.
DVD modulator amplitude switching function
Timing input for generating recording waveform
can be adapted to both differential input (LVDS)
and single-end input (3.3V CMOS/TTL).
Preliminary
32 pin VQFN (Plastic)
Absolute Maximum Ratings
•
Supply voltage
V
CC
V
CC
_LD
•
Storage temperature
Tstg
•
Allowable power dissipation
P
D
Operating Conditions
•
Supply voltage
3.6
5.5
–65 to +150
TBD
V
V
°C
mW
V
CC
3 to 3.6
V
CC
_LD 4.5 to 5.5
•
Operating temperature Topr
–10 to +75
V
V
°C
Applications
CD-R, CD-RW, DVD-R, DVD-RW, DVD+R/RW,
DVD-ROM and DVD-RAM for high-speed writable
optical disc drives
Structure
Bi-CMOS IC
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–
PE03819-PS
CXA2697ER
Block Diagram and Pin Configuration
8
7
6
5
4
3
2
LDOUT1 9
xOUTEN2
OSCMOD
OUTEN2
OSCEN
LDEN1
LDEN2
GND2
GND1
1
LDEN
OSC
CONT
DVD Side
IIN1, 2:
×125
IIN3, 4, 5:
×470
32 OUTEN3
RAMP2 10
Iref
Iref
Iref
Iref
Iref
Vref
31 xOUTEN3
RAMP1 11
OSC
RAMP11 12
30 OUTEN4
29 xOUTEN4
V
CC_
LD 13
28 OUTEN5
R FREQ COMP 14
CD Side
IIN1, 2:
×125
IIN3, 4, 5:
×470
27 xOUTEN5
R FREQ2 15
26 OUTENREF
R FREQ1 16
25 VBG
17
LDOUT2
18
V
CC
2
19
V
CC
1
20
IIN5
21
IIN4
22
IIN3
23
IIN2
24
IIN1
–2–
CXA2697ER
Pin Description
Pin
No.
1
2
27
28
29
30
31
32
3
Symbol
xOUTEN2
OUTEN2
xOUTEN5
OUTEN5
xOUTEN4
OUTEN4
xOUTEN3
OUTEN3
GND1
I/O
I
I
I
I
I
I
I
I
—
Pin
voltage
—
—
—
—
—
—
—
—
—
—
1 29
2 30
27 31
28 32
2k
Equivalent circuit
Description
IIN1 or IIN2 set current control signal
input.
IIN1 or IIN2 set current control signal
input.
IIN5 set current control signal input.
(negative logic)
500
IIN5 set current control signal input.
(positive logic)
IIN4 set current control signal input.
(negative logic)
IIN4 set current control signal input.
(positive logic)
IIN3 set current control signal input.
(negative logic)
IIN3 set current control signal input.
(positive logic)
Ground.
DVD modulator amplitude switching
control signal.
When OSCMOD = high, RAMP1 is
selected.
When OSCMOD = low, RAMP11 is
selected.
Modulator control signal. (positive logic)
When OSCEN = high, the modulator
waveform is output.
4
OSCMOD
I
—
500
4
5
5
OSCEN
I
—
6
LDEN2
I
—
500
6
7
200k
CD output control. (positive logic)
7
LDEN1
I
—
DVD output control. (positive logic)
8
GND2
—
—
—
Ground.
9
LDOUT1
O
—
9
DVD laser drive current output.
Enabled when LDEN 1 = high and
LDEN2 = low.
–3–
CXA2697ER
Pin
No.
Symbol
I/O
Pin
voltage
Equivalent circuit
Description
Modulator amplitude setting 2.
Enabled when LDEN1 = low and
LDEN2 = high.
Connects resistance to ground.
10
RAMP2
O
—
10
300
11
RAMP1
O
—
300
11
12
4p
Modulator amplitude setting 1.
Enabled when LDEN1 = high,
LDEN2 = low and OSCMOD = high.
Connects resistance to ground.
Modulator amplitude setting 11.
Enabled when LDEN1 = high,
LDEN2 = low and OSCMOD = low.
Connects resistance to ground.
12
RAMP11
O
—
13
V
CC
_LD
—
—
—
Output stage supply voltage.
14
R FREQ
COMP
300
O
—
300
14
4p
Modulator frequency variation adjustment.
Connects resistance to ground.
15
R FREQ2
O
—
300
15
16
300
Modulator frequency setting 2.
Enabled when LDEN1 = low and
LDEN2 = high.
Connects resistance to ground.
Modulator frequency setting 1.
Enabled when LDEN1 = high and
LDEN2 = low.
Connects resistance to ground.
16
R FREQ1
O
—
4p
17
LDOUT2
O
—
17
CD laser drive current output.
Enabled when LDEN1 = low and
LDEN2 = high.
18
19
20
V
CC
2
V
CC
1
IIN5
I
I
I
—
—
—
20
—
—
Supply voltage for timing system and
current switch.
Supply voltage for control system and
modulator system.
Current setting 5.
21
22
IIN4
IIN3
I
I
—
—
500
1k
21
22
Current setting 4.
Current setting 3.
–4–
CXA2697ER
Pin
No.
Symbol
I/O
Pin
voltage
Equivalent circuit
Description
23
IIN2
I
—
100
23
24
700
Current setting 2.
24
IIN1
I
—
Current setting 1.
1k
25
VBG
O
1.26V
25
1k
300
Internal reference voltage decoupling.
300
26
OUTENREF
O
1/2V
CC
26
500
Reference voltage output for current
control signal.
Connects decoupling capacitance to
ground.
300
–5–
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