NJW4702 New Japan Radio, NJW4702 Datasheet

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NJW4702

Manufacturer Part Number
NJW4702
Description
3ch Laser Diode Driver
Manufacturer
New Japan Radio
Datasheet
www.DataSheet4U.com
GENERAL DESCRIPTION
FEATURES
BLOCK DIAGRAM
optical power levels. Reference inputs are voltage input, and
voltage control is possible without external resistors. 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.
laser diode for CD-R and CD-RW drivers.
Ver.1
It includes three channels current amplifiers for three different
NJW4702 is a laser diode driver for the operation of a grounded
Operating Voltage
On-chip RF Oscillator
Rise-time/Fall-time
Maximum Output Current 250mA typ.
Bi-CMOS Technology
Package Outline
VCC2
VINR
GND
GND
13
14
15
16
RFREQ
IOUT
12
1
H:ON
4.5V to 5.5V
200MHz to 500MHz
L:ON
1.0ns typ.
PCSP16(3.5mm 0.65mm pitch)
3ch Laser Diode Driver
GND
VIN2
11
2
L:ON
RAMP
VIN3
10
3
OSC
ENABLE
OUTEN2
9
4
BIAS
H:ON
8
7
6
5
PACKAGE OUTLINE
OSCEN
VCC1
GND
OUTEN3
NJW4702SE8
NJW4702
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NJW4702 Summary of contents

Page 1

... GENERAL DESCRIPTION NJW4702 is a laser diode driver for the operation of a grounded laser diode for CD-R and CD-RW drivers. It includes three channels current amplifiers for three different optical power levels. Reference inputs are voltage input, and voltage control is possible without external resistors. An on-chip RF oscillator is provided to reduce laser mode noise during read mode ...

Page 2

... NJW4702 ABSOLUTE MAXUIMUM RATING (Ta=25 C) PARAMETERS Supply Voltage Power Dissipation Operating Temperature Range Storage Temperature Range *EIA/JEDEC STANDARD Test Board(76.2x114.3x1.6mm,4layers,FR-4)mounting RECOMMENDED OPERATING CONDITION (Ta=25 C) PARAMETERS Operating Voltage www.DataSheet4U.com ELECTRICAL CHARACTERISTICS DC CHARACTERISTICS PARAMETERS Supply Current 1 Supply Current 2 Supply Current 3 Supply Current 4 Supply Current 5 ...

Page 3

... Rfreq=3.6k TcOSC Rfreq=3.6k Ino Iout=40mA,CHR only OUTEN2 OUTEN3 X X H/OPEN H/OPEN L H/OPEN H/OPEN OSCEN OUTEN2 X X L/OPEN Ton Toff Tr Tf NJW4702 MIN. TYP. MAX. - 150 - 380 470 560 - -300 - 3.5 Iout OFF Iout=VINR*Gi1 Iout=VINR*Gi1+VIN2*Gi2 Iout=(VINR+VIN3)*Gi1 ...

Page 4

... NJW4702 TEST CIRCUIT www.DataSheet4U.com APPLICATION CIRCUIT DAC CMOS Ver.1 GND GND VINR VCC2 3.6kohm RFREQ IOUT GND VIN2 VIN3 RAMP ENABLE OUTEN2 OSCEN OUTEN3 GND VCC1 GND VINR RFREQ VIN2 VIN3 OUTEN2 OUTEN3 GND Current Probe 1kohm 5V GND PhotoDiode VCC 2 IOUT ...

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