1
SY100EL1003
Micrel, Inc.
M9999-031306
hbwhelp@micrel.com or (408) 955-1690
DESCRIPTION
■Up to 1.25Gbps operation
■75mA peak drive current
■Separate modulation control
■Separate output enable for laser safety
■Differential inputs for data
■75KΩ input pulldown resistor
■Single power supply
■Available in 16-pin SOIC package
The SY100EL1003 is a high speed current source for
driving a semiconductor laser diode in optical transmission
applications. The output current modulation is DC –
voltage controlled. The modulation current is disabled
when output enable is HIGH.
The device incorporates complementary open collector
outputs with a capability of driving peak current of 75mA.
The laser driver current is adjustable by selection of RSET.
The resistor REXT must be placed between OUT and
VCC to dissipate the worst case power. RSER is
recommended to fix laser diode matching issues.
The SY100EL1003 utilizes the high performance
bipolar ASSET technology.
FEATURES
LASER DIODE DRIVER
WITH OUTPUT ENABLE SY100EL1003
BLOCK DIAGRAM
D
EN
V
CC
R
EXT
OUT OUT
V
BB
R
SET
V
EE
R
SER
to Laser Diode
MC
Modulation Control
D
Internal Logic
BIAS
Control
R
SET
1Rev.: H Amendment: /0
Issue Date:
March 2006
2
SY100EL1003
Micrel, Inc.
M9999-031306
hbwhelp@micrel.com or (408) 955-1690
PACKAGE/ORDERING INFORMATION
Ordering Information(1)
Package Operating Package Lead
Part Number Type Range Marking Finish
SY100EL1003ZC Z16-2 Commercial SY100EL1003ZC Sn-Pb
SY100EL1003ZCTR(2) Z16-2 Commercial SY100EL1003ZC Sn-Pb
SY100EL1003ZI Z16-2 Industrial SY100EL1003ZI Sn-Pb
SY100EL1003ZITR(2) Z16-2 Industrial SY100EL1003ZI Sn-Pb
SY100EL1003ZG(3) Z16-2 Industrial SY100EL1003ZG with Pb-Free
Pb-Free bar-line indicator NiPdAu
SY100EL1003ZGTR(2, 3) Z16-2 Industrial SY100EL1003ZG with Pb-Free
Pb-Free bar-line indicator NiPdAu
Notes:
1. Contact factory for die availability. Dice are guaranteed at TA = 25°C, DC Electricals only.
2. Tape and Reel.
3. Pb-Free package is recommended for new designs.
16-Pin Narrow SOIC (Z16-2)
N
C
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
EN
N/C
RSET
VCCO
D
D
NC
VCC
NC
MC
OUT
OUT
VBB
NC
VEE
Top View
SOIC
Z16-2
3
SY100EL1003
Micrel, Inc.
M9999-031306
hbwhelp@micrel.com or (408) 955-1690
D D EN OUT OUT
LHLHL
HLLLH
XXHHL
NOTE:
1. L = LOW, H = HIGH, X = don't care
Pin Function
VCC, VCCO Separate positive power supply pins help
to isolate sensitive circuitry from noise
generating function. +5V for PECL operation
or ground for ECL operation.
VEE Most negative power supply input. Ground
for PECL operation or -5V for ECL operation.
VBB This pin provides a reference voltage for use
in single ended applications or when the
input signal is AC coupled into the device.
D,D These differential ECL/PECL 100K
compatible inputs receive NRZ data.
EN This ECL/PECL 100K compatible input enables
Laser Driver - modulation current transitions to
zero when asserted HIGH.
OUT, OUT Open collector outputs from the modulation
buffer drive these differential current outputs.
MC An external voltage sets the main value of
modulation current IO.
RSET An external resistor sets the source current
for modulation Imod.
NC These pins are not connected.
Symbol Rating Value Unit
VEE Power Supply Voltage (VCC = 0V) 0 to -7.0 V
VIN Input Voltage (VCC = 0V) 0 to -6.0 V
IOUT Output Current 75 mA
TLEAD Lead Temperatre (soldering, 20sec.) +260°°C
TAOperating Temperature Range –40 to +85°°C
Ptot Power Dissipation 500 mW
Note:
1. Permanent device damage may occur if absolute maximum ratings are exceeded. This is a stress rating only and functional operation is not implied at
conditions other than those detailed in the operational sections of this data sheet. Exposure to absolute maximum ratlng conditions for extended periods
may affect device reliability.
ABSOLUTE MAXIMUM RATINGS(1)
PIN NAMES TRUTH TABLE(1)
Symbol Rating Value Unit
VEE Power Supply Voltage –4.75 to -5.25 V
RSET Resistor to Adjust Current 10 to 100 Ω
REXT Resistor to Dissipate Power 10 to 50 Ω
RSER Laser Diode Serial Resistor 0 to 50 Ω
OPERATIONING CONDITIONS(1)
Note:
1. The voltage drop across REXT and RSER should not be greater than 2V.
4
SY100EL1003
Micrel, Inc.
M9999-031306
hbwhelp@micrel.com or (408) 955-1690
TA = –40°CTA = 0°CTA = +25°CTA = +85°C
Symbol Parameter Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Unit
tpd D Propagation Delay ——1000 ——1000 ——1000 ——1000 ps
D - OUT
tpd EN Propogation Delay ——1000 ——1000 ——1000 ——1000 ps
EN - OUT
trRise/Fall Time ——400 ——400 ——400 ——400 ps
tf(20% to 80%)
DC ELECTRICAL CHARACTERISTICS(1)
VCC = VCCO = 0V; VEE = -5.0V ± 5%
VImod = –1.5V; VCC = VCCO = 0V; VEE = –5V ± 5%
Notes:
1. RSET = 10Ω ± 1%
2. VI = VIL(Min.)
3. VImod = VCC
4. VImod = -3.5V
5. VLmod = -0.8V
6. IOH = 5 to 60mA
AC ELECTRICAL CHARACTERISTICS(1)
TA = –40°CTA = 0°CTA = +25°CTA = +85°C
Symbol Parameter Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Unit
VIH Input HIGH Voltage -1165 —-880 -1165 —-880 -1165 —-880 -1165 —-880 mV
(D, EN)
VIL Input LOW Voltage -1810 —-1475 -1810 —-1475 -1810 —-1475 -1810 —-1475 mV
(D, EN)
VImod Input Voltage VEE —VCC VEE —VCC VEE —VCC VEE —VCC V
(Modulation Control)
VBB Output Reference -1380 —-1260 -1380 —-1260 -1380 —-1260 -1380 —-1260 mV
Voltage
IIH Input HIGH Current ——150 ——150 ——150 ——150 µA
(D, EN)
IImod Input Current ——150 ——150 ——150 ——150 µA
(Modulation Control)
IIL Input LOW Current(2) 0.5 —— 0.5 ——0.5 ——0.5 ——µA
(D, EN)
ICC Supply Current(3) 8 14 25 8 14 25 8 14 25 8 14 25 mA
IOH Output HIGH Current(4) 60 64 68 60 64 68 60 64 68 60 64 68 mA
(EN LOW)(5) —— 5—— 5—— 5——5
IOL Output LOW Current ——500 ——500 ——500 ——500 µA
(EN HIGH)
IOR Output Current Ringing(6) ——10 ——10 ——10 ——10 %
IOmod Laser Diode Modulation 5 —60 5 —60 5 —60 5 —60 mA
Current Range
Note:
1. RSET = 10Ω ± 1%, REXT = RSER = 50Ω ± 1%
5
SY100EL1003
Micrel, Inc.
M9999-031306
hbwhelp@micrel.com or (408) 955-1690
PERFORMANCE CURVES
20
30
40
50
60
70
IO (mA)
IO vs. TA and Vmod
10
2.0 3.0 4.0 5.00 1.0
0
TA = 0˚C
TA = 25˚C
TA = 70˚C
-Vmod (V)
6
SY100EL1003
Micrel, Inc.
M9999-031306
hbwhelp@micrel.com or (408) 955-1690
APPLICATION EXAMPLE
NOTES:
1. Split 100K ECL terminations are 82Ω and 130Ω to V
CC
and V
EE
respectively.
2. Recommended power supply bypass capacitors are 0.1µF with optional 10µF Tantalum in parallel.
3. It is required to use high frequency design techniques for board layout. A double sided or multilayer board is recommended in conjunction with a low
impedance ground plane and properly terminated transmission lines for all signal paths.
4. V
BB
voltage pin may be used as reference for single ended input applications.
V
CC
R
SET
V
EE
V
CCO
D
50Ω COAX
50Ω COAX
R
EXT
R
SET
SY100EL1003
V
EE
V
EE
OUT
R
SER
V
EE
LASER MODULE
INPUTS
50Ω COAX
LASER BIAS / APC CONTROL
470kΩ
0.1µF
0.1µF
1kΩ1kΩ
0.1µF
10kΩ
1kΩ
B
750Ω47kΩ47kΩ
4.7kΩ47kΩ
10k
A
D
EN
OUT
0.02µF
V
EE
V
CC
V
CC
V
CC
IC
1
= IC
2
= LM324
V
EE
= –5.0V
V
CC
= 0V
IC2
–
+
IC1
–
+
0.1µH
V
CC
V
CC
V
CC
0.1µF
130Ω
82Ω
MC
V
CC
V
EE
10k 10Ω
24Ω
7
SY100EL1003
Micrel, Inc.
M9999-031306
hbwhelp@micrel.com or (408) 955-1690
16-PIN SOIC .150" WIDE (Z16-2)
Rev. 02
MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL + 1 (408) 944-0800 FAX + 1 (408) 474-1000 WEB http://www.micrel.com
The information furnished by Micrel in this datasheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its use.
Micrel reserves the right to change circuitry and specifications at any time without notification to the customer.
Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product can
reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant into
the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A Purchaser’s
use or sale of Micrel Products for use in life support appliances, devices or systems is at Purchaser’s own risk and Purchaser agrees to fully indemnify
Micrel for any damages resulting from such use or sale.
© 2006 Micrel, Incorporated.
