MAX3263CAG Maxim Integrated Products, MAX3263CAG Datasheet

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MAX3263CAG

Manufacturer Part Number
MAX3263CAG
Description
Single +5V, fully integrated, 155Mbps laser diode driver.
Manufacturer
Maxim Integrated Products
Datasheet

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The MAX3263 is a complete, easy-to-program, single
+5V-powered, 155Mbps laser diode driver with com-
plementary enable inputs and automatic power control
(APC). The MAX3263 accepts differential PECL inputs
and provides complementary output currents. A tem-
perature-stabilized reference voltage is provided to
simplify laser current programming. This allows modu-
lation current to be programmed up to 30mA and bias
current to be programmed from up to 60mA with two
external resistors.
An APC circuit is provided to maintain constant laser
power in transmitters that use a monitor photodiode.
Only two external resistors are required to implement
the APC function.
The MAX3263’s fully integrated feature set includes a
TTL-compatible laser failure indicator and a program-
mable slow-start circuit to prevent laser damage. The
slow-start is preset to 50ns and can be extended by
adding an external capacitor.
___________________Pin Configuration
________________General Description
________________________Applications
19-0432; Rev 1b; 4/98
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
TOP VIEW
Laser Diode Transmitters
155Mbps SDH/SONET
155Mbps ATM
FAILOUT
IPINSET
OSADJ
VREF2
VREF1
GNDB
GNDB
VCCB
ENB+
ENB-
VIN+
VIN-
________________________________________________________________ Maxim Integrated Products
10
11
12
1
2
3
4
5
6
7
8
9
MAX3263
SSOP
24
23
22
21
20
19
18
17
16
15
14
13
SLWSTRT
IPIN
VCCA
GNDA
OUT+
GNDA
OUT-
GNDA
IBIASOUT
IMODSET
IBIASSET
IBIASFB
Single +5V, Fully Integrated,
155Mbps Laser Diode Driver
____________________________Features
_____________Typical Operating Circuit
_______________Ordering Information
INPUTS
MAX3263CAG
Rise Times Less than 1ns
Differential PECL Inputs
Single +5V Supply
Automatic Power Control
Temperature-Compensated Reference Voltage
Complementary Enable Inputs
PECL
+5V
PART
0.01 F
OSADJ
VIN+
VIN-
GNDA
GNDB
ENB+
ENB-
SLWSTRT
VREF1
VREF2
IMODSET
VCCA VCCB
MAX3263
IPINSET
TEMP. RANGE
0°C to +70°C
IBIASOUT
FAILOUT
IBIASSET
IBIASFB
OUT+
OUT-
IPIN
0.01 F
+5V
PHOTO-
DIODE
FERRITE BEAD
PIN-PACKAGE
24 SSOP
+5V
LASER
+5V
2.7k
1

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MAX3263CAG Summary of contents

Page 1

... For small orders, phone 1-800-835-8769. Single +5V, Fully Integrated, 155Mbps Laser Diode Driver ____________________________Features Rise Times Less than 1ns Differential PECL Inputs Single +5V Supply Automatic Power Control Temperature-Compensated Reference Voltage Complementary Enable Inputs _______________Ordering Information PART MAX3263CAG _____________Typical Operating Circuit +5V 0.01 F PECL INPUTS SLWSTRT 24 IPIN 23 VCCA 22 ...

Page 2

Single +5V, Fully Integrated, 155Mbps Laser Diode Driver ABSOLUTE MAXIMUM RATINGS Terminal Voltage (with respect to GND) Supply Voltages ( B).............................-0. VIN+, VIN-, FAILOUT ................................................ OUT+, OUT-, IBIASOUT ......................................+1. ENB+, ...

Page 3

... Operating Characteristics (MAX3263CAG loads at OUT+ and OUT vs. BIAS CURRENT BIASSET (mA) BIAS PERCENT CHANGE IN MODULATION CURRENT vs. TEMPERATURE - TEMPERATURE (°C) ALLOWABLE R OSADJ vs. MODULATION CURRENT ALLOWABLE ...

Page 4

Single +5V, Fully Integrated, 155Mbps Laser Diode Driver ______________________________________________________________Pin Description PIN NAME 1 VREF2 Temperature-Compensated Reference Output. VREF2 is internally connected to VREF1. Monitor Photodiode Programming Input. Connect INPINSET to VREF1 or VREF2 through a 2 IPINSET resistor to set ...

Page 5

MAX3263 VIN+ VIN- VCCA VCCB GNDA GNDB ENB+ MAIN BIAS GENERATOR ENB- SLWSTRT BANDGAP REFERENCE Figure 1. Functional Diagram _______________Detailed Description The MAX3263 laser driver has three main sections: a reference generator with temperature compensation, a laser bias block with ...

Page 6

Single +5V, Fully Integrated, 155Mbps Laser Diode Driver The overshoot mirror sets the bias in the input buffer stage (Figure 2). Reducing this current slows the input stage and reduces overshoot in the modulation signal. At the same time, the ...

Page 7

Figure 3. Enable/Disable Operation Table 1. MAX3263 Truth Table ENB- ENB Temperature Considerations The MAX3263 output currents are programmed by cur- rent mirrors. These mirrors each have a 2V coefficient. ...

Page 8

Single +5V, Fully Integrated, 155Mbps Laser Diode Driver PECL SIGNAL SOURCE a) THEVENIN-EQUIVALENT TERMINATION NON-PECL SIGNAL SOURCE b) DIFFERENTIAL NON-PECL TERMINATION NON-PECL SIGNAL SOURCE c) SINGLE-ENDED NON-PECL TERMINATION ECL SIGNAL SOURCE d) ECL TERMINATION THIS SYMBOL REPRESENTS A TRANSMISSION LINE ...

Page 9

OUT+ 0.1 F MAX3263 PHOTO- DIODE IPIN 10 H IBIASOUT FERRITE 18 BEAD OUT- Figure 5. Typical Laser Interface with Bias Compensation heat. Fortunately, a substantial portion of this power is dissipated across the laser diode. A typical ...

Page 10

Single +5V, Fully Integrated, 155Mbps Laser Diode Driver In this case, set the initial bias value to 34mA (which is the midpoint of the two extremes). The 40mA adjust- ment range of the MAX3263 maintains the average laser power at ...

Page 11

Single +5V, Fully Integrated, 155Mbps Laser Diode Driver ______________________________________________________________________________________ NOTES 11 ...

Page 12

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 1998 Maxim Integrated Products ...

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