NJW4710VE1-TE1 [NJRC]
Interface Circuit;
| 型号： | NJW4710VE1-TE1 |
| 厂家： | 
NEW JAPAN RADIO |
| 描述： | Interface Circuit |
| 文件： | 总9页 (文件大小：107K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
NJW4710
4ch Laser Diode Driver for Blue Laser Diode
■GENERAL DESCRIPTION
■PACKAGE OUTLINE
NJW4710 is a laser diode driver for the operation of a grounded
blue laser diode. It is suited to drive a blue laser diode, because it is
operated by split power supply. It includes 4 channels current amplifiers
for 4 different optical power levels. An on-chip RF oscillator is provided
to reduce laser mode noise during read mode. Oscillation frequency
and oscillation amplitude are defined by two external resistors
NJW4710VE1
■FEATURE
■ Operating Voltage
■ Internal Oscillator Circuit
■ Rise Time / Fall Time
Vcc1=4.5V to 5.5V, Vcc2=8.0 to 10.0V
200MHz to 500MHz
0.8ns typ.
■ Maximum Output Current 250mA typ.
■ Bi-CMOS Technology
■ Package Outline
SSOP24-E1
■PIN CONFIGURATION
1
24
13:GND
1:GND
14:Vcc2
15:Vcc2
16:OSCEN
17:ENABLE
18:Ramp
19:GND
20:Iout
2:IinR
3:GND
4:Iin2
5:Rfreq
6:Iin3
7:Iin4
8:Vcc1
9:OUTEN2
10:OUTEN3
11:OUTEN4
12:GND
21:Iout
22:Vcc2
23:Vcc2
24:GND
12
13
■BLOCK DIAGRAM
OUTEN4
GND
Vcc2
OUTEN2
OUTEN3
CH-R
OSCEN
Ramp
I INR
I IN2
I IN3
I IN4
CH-2
OSC
Rfreq
CH-3
Iout
CH-4
Vcc1
ENABLE
BIAS
- 1 -
Ver.2
NJW4710
■ ABSOLUTE MAXIMUM RATINGS(Ta=25°C)
PARAMETER
SYMBOL
Vcc1
Vcc2
Vin
RATINGS
6.0
UNIT
V
V
Supply Voltage 1
Supply Voltage 2
Input Voltage
11.0
6.0
V
Power Dissipation
Operating Temperature Range
Storage Temperature Range
PD
Topr
Tstg
700
-40 to +85
-40 to +150
mW
°C
°C
■ RECOMMENDED OPEARATING CONDITION(Ta=25°C)
PARAMETER
SYMBOL
TEST CONDITION
MIN. TYP. MAX. UNIT
Operating Voltage1
Operating Voltage2
Vopr1
Vopr2
4.5
8.0
5.0
9.0
5.5
10.0
V
V
■ ELECTRICAL CHARACTERISTICS
■ DC CHARACTERISTICS(Vcc1=5V,Vcc2=9V,ENABLE=H,OUTEN=H,OSCEN=L H:5V,L:GND, Ta=25°C)
PARAMETER
SYMBOL
TEST CONDITION
MIN. TYP. MAX. UNIT
Supply Current 1
ICC1
ICC2
ICC3
ICC4
ICC5
VIH
VIL
-
-
-
-
-
0
19
33
62
120
-
10
24
40
76
140
-
mA
mA
mA
mA
mA
V
ENABLE≤0.5V
Supply Current 2
Supply Current 3
Supply Current 4
Supply Current 5
High Level Input Voltage
Low Level Input Voltage
ENABLE High Level
Input Voltage
ENABLE Low Level
Input Voltage
OUTEN High Level
Input Current
OUTEN Low Level
Input Current
ENABLE High Level
Input Current
ENABLE Low Level
Input Current
OSCEN High Level
Input Current
IINR/2/3/4=0uA,Rfeq=OPEN,Ramp=OPEN
OSCEN=H, Rfreq=3.6kΩ,Ramp=5kΩ
OUTEN=H, IIN/2/3/4=500uA
OUTEN=H, IINR/2/3/4=500uA
OUTEN, OSCEN
2
-
OUTEN, OSCEN
-
1.3
V
EVIH ENABLE
EVIL ENABLE
3
-
-
-
-
-
-
-
-
-
V
1.5
10
0
V
DIIH
DIIL
EIIH
EIIL
OUTEN=5V
0
uA
uA
uA
OUTEN=0V
ENABLE=5V
ENABLE=0V
-300
0
500
0
-10
0
uA
uA
OIIH OSCEN=5V
450
OSCEN Low Level
Input Current
uA
V
OIIL
OSCEN=0V
-10
-
-
0
V+1 Shut-Down Voltage
Vshut
3.40
3.75
- 2 -
Ver.2
NJW4710
■ Laser Amplifier DC CHARACTERISTICS(Vcc1=5V, Vcc2=9V ENABLE=H,H:5V,L:GND,Ta=25°C)
PARAMETER
SYMBOL
TEST CONDITION
MIN. TYP. MAX. UNIT
MA
Current Gain
Gi
CHR/2/3/4, Vo=5V *1
80
110
140
/mA
MA
%
MA
MA
MA
MA
Ω
kΩ
Ω
MA
MA
MA
Output Offset Current
Output Current Linearity
Input Current Range 1
Input Current Range 2
Maximum Output Current 1
Maximum Output Current 2
Iout Series Resintance
Input Resistance 1
Input Resistance 2
Output OFF Current 1
Output OFF Current 2
Output OFF Current 3
Output Current
Ios
Iiin
Iin1
Iin2
CHR/2/3/4, Vo=5V *1
CHR/2/3/4, Vo=5V *1
CHR
-5
-3
0
-
-
-
+5
+3
2
3.5
-
CH2/3/4
0
-
Iomax1 CHR
Iomax2 CH2/3/4
50
100
-
1.62
325
-
100
200
10
2.5
500
-
-
-
Ro
Iout=200mA
CHR
CH2/3/4
ENABLE=L
OUTEN=H, Total for All Channels
OUTEN=L, IIN=0uA,Total for All Channels
V+1=5V±0.5V, V+2=9V±0.5V,Iout=40mA
V+1=5V±0.5V, V+2=9V±0.5V,Iout=80mA
Iout=40mA,CHR only
Rin1
Rin2
Ioff1
Ioff2
Ioff2
3.38
675
5
5
5
-
-
-
-
Vc1
Vc2
TC1
TC2
-1
-1
-
2
4
4
-
%/V
%/V
Supply Sensitivity 1
Output Current
Supply Sensitivity 2
Output Current
Temperature Sensitivity 1
2
ppm/
°C
ppm/
°C
400
400
Output Current
Temperature Sensitivity 2
Iout=80mA,40mARead+40mA,Write
-
-
*1 The amplifier linearity is calculated using best fit method at three points. The output currents chosen 20 mA,
40mA,and, 60mA.The transfer function for Iout is defined as follows: Iout =(IIN+GAIN)+IOS
■ Laser Amplifier AC CHARACTERISTICS (Vcc1=5V, Vcc2=9V,Iout=40mA DC with 40mA PULSE, Ta=25°C)
PARAMETER
SYMBOL
TEST CONDITION
MIN. TYP. MAX. UNIT
Rise Time
Fall Time
Tr
Tf
OS
Ton
Toff
Tdis
Ten
Tdiso
Teno
fOSC
Iout= 40mA(Read)+40mA(10-90%)
Iout= 40mA(Read)+40mA(10-90%)
-
-
-
-
-
-
-
-
-
0.8
0.8
5
1
1
20
150
10
10
-
-
-
-
-
-
-
-
-
ns
ns
%
ns
ns
ns
ns
ns
ns
Over Shoot
Iout ON Time
Iout OFF Time
Disable Time
Enable Time
HFM Disable Time
HFM Enable Time
Oscillator Frequency
Oscillator Temperature
Coefficient
OUTEN 50% H→L to Iout 50%
OUTEN 50% H→L to Iout 50%
ENABLE 50%H→L to Iout 50%
ENABLE 50%L→H to Iout 50%,
OSCEN H→L to Iout 50%
OSCEN L→H to Iout 50%,
Rfreq=3.6kΩ
280
350 420
MHz
TcOSC
Ino
-
-
-300
0.9
-
-
Rfreq=3.6kΩ
ppm/°C
nA/√Hz
Output Current Noise
Iout=40mA,CHR only
- 3 -
Ver.2
NJW4710
■ Iout Control
ENABLE
OUTEN2
OUTEN3
OUTEN4
Iout
L/OPEN
X
X
X
OFF
H
H
H
H
H/OPEN
H/OPEN
H/OPEN
H/OPEN
H/OPEN
L
Iout= IINR*120
L
L
L
H/OPEN
Iout=(IINR+IIN2)*120
Iout=(IINR+IIN2+IIN3)*120
Iout=(IINR+IIN2+IIN3+IIN4)*120
L
L
■ Oscillator Control
ENABLE
OSCEN
OUTEN2
OUTEN3
OUTEN4
OSCILLATOR
L/OPEN
X
X
X
X
X
X
X
X
X
X
OFF
OFF
ON
H
H
L/OPEN
H
■ Timing Diagram
ENABLE
OUTEN2
OUTEN3
OUTEN4
tr
tf
tr
tf
tr
tf
Iout
Ten
Ton Toff Ton Toff Ton Toff Tdis
- 4 -
Ver.2
NJW4710
■ TEST CIRCUIT
GND
IinR
GND
1
24
23
22
21
20
19
18
17
16
15
14
13
2K
Vcc2
Vcc2
2
+
0.1u
IinR
0.1u
GND
Iin2
3
LD
2K
Iout
Iout
4
+ 0.1u
Iin2
Iin3
0.1u
Rfreq
5
3.6K
2K
0.1u
GND
Ramp
Iin3
Iin4
6
+ 0.1u
+0.1u
2K
5.0K
7
Iin4
5V
0.1u
Vcc1
ENABLE
OSCEN
Vcc2
+
8
CMOS
1u
10u
OUTEN2
OUTEN3
9
TTL/CMOS
TTL/CMOS
9V
10
11
12
+
TTL/CMOS
TTL/CMOS
1u
10u
OUTEN4
GND
Vcc2
GND
- 5 -
Ver.2
NJW4710
■ TERMINAL EXPLANATION
Pin No.
Pin Name
Function
1
3
12
13
19
24
GND
GND
Input of constant current output circuit for Read Channel.
Output current value is set up by input current or input voltage.
Input of constant current output circuit for Erase, Write Channel.
Output current value is setup by input current or input voltage.
Set up for oscillator frequency.
Resistance is connected to GND and a setup in optional frequency.
Input of constant current output circuit for Erase, Write Channel.
Output current value is setup by input current or input voltage.
Input of constant current output circuit for Erase, Write Channel.
Output current value is setup by input current or input voltage.
Supply voltage for amplifier circuit: Vcc1=5V
Output current control for channel 2
2
4
5
6
IinR
Iin2
Rfreq
Iin3
7
8
Iin4
Vcc1
9
OUTEN2
OUTEN3
OUTEN4
High(<2V) or OPEN: Non-Output
Low(>1.3V): Output
Output current control for channel 3
High(<2V) or OPEN: Non-Output
Low(>1.3V): Output
Output current control for channel 4
High(<2V) or OPEN: Non-Output
10
11
Low(>1.3V): Output
14
15
22
23
Vcc2
Supply voltage for output circuit: Vcc2=9V
Output control for oscillator.
16
OSCEN
High(<2V): Oscillation superposition
Low(>1.3V) or OPEN: Non-Output
Control for IC.
17
18
ENABLE
High(<3V): Output
Low(>1.5V) or OPEN: Non-Output
Setup for oscillation superposition.
Resistance is connected to GND and a setup in optional oscillation superposition.
Output current terminal.
Ranp
Iout
20
21
Please connect cathode common type laser or floating type laser to GND.
*Please set up Low voltage not less than GND-0.3V ,and High voltage of each control terminal (ENABLE,
OUTEN 2, 3, and 4, OSCEN) does not exceed Vcc1+0.3V.
- 6 -
Ver.2
NJW4710
■ APPLICATION
■ Set up for operating voltage
Recommended operating voltage of NJW4710 is Vcc=5V,Vcc=9V.
Vcc2=9V is set up in consideration of the forward voltage [VF] (6V max.) of a Blue Laser Diode.
Therefore, in the case of a Red Laser Diode or Blue Laser Diode with low forward voltage, please set up the
power supply voltage of Vcc2 above the following.
Operating voltage of Vcc2 = forward voltage(MAX) of laser diode + 3V
■ Set up for output current
Current gains of each channels of all are 120mA/mA typ.
Set up of the output current value in current input and voltage input is below.
In the case of current input
Please input current to IC. Output current is the following.
Rex
Rin
Iin
Iout=120*Iin [mA]
Fig.2 In the case of current input
In the case of current input
Iin
Output current is the following.
Iout=120*Vin/(Rex+Rin) [mA]
Rex
Rin
Vin
Output current can be set up by Rex=0ohm.
However, to reduce input noise,
please add a capacitor between Rex and GND.
(Refer to TEST CIRCUIT).
Rin(input resistance of IC) is CH-R:2.5kohm,CH-2/3/4:500ohm.
Fig.3 In the case of voltage input
■ Set up for internal Oscillator
NJW4710 contained in the oscillator for the light power change reduction by the return light noise of laser.
The quality of reading improves by operating oscillator and output it.
In this oscillator, oscillation frequency can be set up by connect resistance with a Rfreq(5pin) between GND.
Moreover, set up of the amount of oscillation superposition can be performed by connect resistance with a
Ramp(18pin) between GND.
Oscillation frequency is 150MHz to 600MHz. It can adjust to 10mApp to 100mApp (Refer to TYPCAL
CHARACTERISTICS) in the amount of high frequency superposition.
Output of this oscillator is PUSH-PULL circuit. Therefore, the output of the oscillator for high frequency
superposition is overlapped focusing on the output current value set up in the constant current output circuit.
- 7 -
Ver.2
NJW4710
Frequency/Amplitude vs. Rfreq
Frequency/Amplitude vs Ramp
Rfreq=3.8K
Ramp=5K
800
700
600
500
400
300
200
100
0
160
140
120
100
80
800
700
600
500
400
300
200
100
0
160
140
120
100
80
Frequency
Frequency
Amplitude
60
60
40
40
20
20
Amplitude
0
0
0
2
4
6
8
10
12
0
2
4
6
8
10
12
14
16
Ramp (K ohm)
Rfreq (K ohm)
Oscillation frequency/Amplitude
vs. Resistance for set up frequency
Oscillation frequency/Amplitude
vs. Resistance for set up overlap
- 8 -
Ver.2
NJW4710
■ PACKAGE OUTLINE
SSOP24-E1
0 ~ 10°
7. 9 ± 0. 2
24
13
1
12
0. 65
0.375TYP
+ 0.1
- 0.05
0. 15
0. 10
0. 12
+ 0.1
- 0.05
0. 22
M
[CAUTION]
The specifications on this databook are only
given for information , without any
guarantee
as regards either mistakes or omissions. The
application circuits in this databook are
described only to show representative usages
of the product and not intended for the
guarantee or permission of any right
- 9 -
Ver.2
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