CD-ROM drives
Parameter
Ratings
Unit
*1 Optical power output
4.3
mW
Reverse
voltage
Laser
2
Monitor photodiode
V
R
30
V
OPIC supply voltage
V
CC
6
Topr
-10 to +70
Tstg
-40 to +85
C
Tsol
260(5s or less)
Symbol
[Terminal connection]
D3
Vcc
LD
GND
V
A
V
B
V
C
V
E
V
F
1/2Vcc
D4 D1
D2
D5
Monitor PD
Monitor PD
1
4
6
2
3
7
9
5
10
8
1
7
6
4.6
1.2
2.0
1.27
Hologram glass
Cap glass
0.25
LD chip
Reference surface
4
9
5
1
3
10
8.2
6.63
3.2
0.25
MIN.
0.25
MIN.
8.2
4.77
4.8
2.8
0.3
MAX.
4.8
3.97
4.9
8
2
(Tc=25C)
H
P
LT0H49L/T
Compact Hologram Laser
(LT0H49L)
(LT0H49T)
(Unit:mm)
10
-
0.4
Compact Hologram Laser(3-beam) for 16X Speed CD-ROM Drive
P1.4X3=4.2
Tec.970101
Under development
New product
Features
(1) Built-in high speed(TYP.30MHz) OPIC* for 16X
speed CD-ROM drive
(2) Enables to design compact pick-up thanks to
compact package (Thickness: 4.8mm)
(3) Voltage output type
(Needless of external noise solution)
(4) Low current operation type
(Operating current : TYP. 36mA)
Applications
Model Name
LT0H49L----Single power supply
LT0H49T----Dual power supply
*OPIC: OPIC (Optical IC) is a trademark of the SHARP Corporation.
An OPIC consists of a light-detecting element and signal-processing circuit
integrated onto a single chip.
Model Name
*2 Operating temperature
*2 Storage temperature
*3 Soldering temperature
*1 Output power from hologram laser
*2 Case temperature
*3 At the position of 1.6mm from the
bottom face of resin package
(Notice)
(Internet)
Data for Sharp's optoelectronic/power devices is provided for internet. ( Address http://www.sharp.co.jp/ecg/)
In the absence of device specification sheets, SHARP takes no responsibility for any defects that may occur in equipment using any SHARP d
shown in catalogs, data books, etc. Contact SHARP in order to obtain the latest device specification sheets before using any SHARP dev
Specifications are subject to change without notice for improvement.
As of January 1997
Outline Dimensions
Parameter
Symbol
Conditions
Unit
Remarks*1
Threshold current
Ith
-
-
25
mA
Operating current
Iop
-
36
45
mA
Laser
Operating voltage
Vop
P =2.7mW
H
-
1.75
2.2
V
Wavelength
p
770
780
795
nm
Monitor current
Im
0.06 0.28
0.50
0.12 0.55
1.00
mA
x
- 80
-
80
m
Emission point
Accuracy(position)
y
-
-
80
m
z
-
80
m
1.8mW
Differential efficiency
0.17
0.27
0.55 mW/mA
Sensitivity(*)
S
-
0.10
-
mA/mW
Dark current
I
D
V
R
=15V
-
-
150
nA
Terminal capacitance Ct
-
9
-
pF
Operating supply voltage Vcc
4.5
-
5.5
V
Collector current
Icc
Vcc=5V
2.0
4.5
9.0
mA
V
OD
Difference from Vcc/2
-25
0
25
mV
V
A~F
Extremes of off-set voltage
V
OD
Vcc=5V, No light
-15
0
15
mV
Response frequency*2
fc
Vcc=5V,-3dB
-
MH
Z
V
E
,V
F
MIN.
TYP. MAX.
V
A
-V
B
,V
E
-V
F
39
- 80
- 80
V
A
,V
B
,V
C
fc
Vcc=5V,-3dB (*3)
24.0
30.0
2.0
1.0
-
MH
Z
R
Iop(2.7mW)-Iop(0.9mW)
*3 f
CF=
(fc(V
A
)+f
c
(V
B
)+2f
C
(V
C
))/4
P
H
=2.7mW, V
R
=15V
LT0H49L
LT0H49T
Vcc
GND
0.022F
0.022F
10F
10F
1/2Vcc
[Ex.]
+
-
+
-
Tec.970101
LT0H49L/T
Electro-optical Characteristics
(Vcc=5V, Tc=25C)
Monitor
photodiode
OPIC for
signal
detection
Output off-set voltage
D 2
D 3
D 4
D 5
D 1
D 1
V
E
D 2
V
A
D 4
V
C
D 5
V
F
D 3
V
B
Terminal No.
Fig.1
* Sensitivity for output power from hologram laser
*1 Applicable divisions correspond to pattern segment No.
Hologram
laser
*2 Output amplitude = 0dB(input signal 100MHz)
Note)Please attach bypass capacitor at the position of 1cm or less from pins (between Vcc and GND, GND and 1/2Vcc).
As of January 1997
Measuring method of electro-optical characteristics
Laser
Driver
HL
C.L
NA=0.11
f=20.6mm
Actuator
NA=0.50
f=4.5mm
Disk
(SONY:YEDS-18)
Vcc=5V,Tc=25
Focus error balance*3
20
%
RF output amplitude*5
V
RF
V
RF
=0.55V
V
RF
=0.55V
V
RF
=0.55V
V
RF
=0.55V
0.38
0.9
V p-p
Focus error signal output amplitude*6
0.23
0.35
0.47
0.08
0.12
0.16
V p-p
V p-p
20
Radial error balance*4
20
%
P
O
=3.0mW
P
O
=3.0mW
20
Parameter
Symbol
Condition
MIN.
TYP.
MAX.
Unit
Focus error signal offsetting*2
0.5
m
0.5
a
b
GND
*4
( + amplitude of RES )
( - amplitude of RES )
APC
A
B
( + amplitude of FES)
( - amplitude of FES)
*3 (a - b) / (a + b)
Tec.970101
LT0H49L/T
Electro-optical Characteristics*1
Radial error signal output amplitude
*1 Measuring method is shown below.
V
A
,V
B
,V
E
,V
F
: Refer to pattern segment No.(Fig.1).
*2 Distance between FES=0 and jitter Min. point
( a - b )
2 X ( a + b )
*5 Amplitude of V
A
+ V
B
+ 2V
C
, focus/radial servo is ON-state.
*6 V
B
-V
A
at focus rocking condition
*7 V
E
-V
F
under the condition that only focus servo is effected.
As of January 1997
PDF 
ZIP