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Analog Technologies

ATLS100MA104

Low Noise Constant Current Laser Controller

Figure 1. Physical Photo of ATLS100mA104

FEATURES

Ultra Low Noise (RMS): <0.6

−30ºC ~ 60ºC

Loop good indication

Controller internal temperature monitoring

Complete Shielding

Compact Size

100 % Lead (Pb)-free and RoHS Compliant

DIP and SMT Packages Available

Soft-Start

Note: The surface mount version is not recommended

for new designs.

APPLICATIONS

Driving laser diodes with ultra low noise, such as DPSSL,

EDFA, SOA, fiber laser, DSB diode lasers, etc.

DESCRIPTION

The ATLS100MA104 is an electronic module designed for

driving diode lasers with up to 100mA extra low noise

current. The output voltage is 0.5V to 3.5V when powered

by a 5.5V power supply. Figure 1 shows the photo of

ATLS100MA104.

The controller has temperature compensation network so

that the output current maintains the same even as the

controller temperature rises.

In case the controller temperature exceeds a preset limit, 120

°C,

the controller will be shut down by itself to prevent the

controller from being damaged by the over heat.

The output current of the ATLS100MA104 can be set by an

input voltage linearly or modulated by an external signal of up

to 4.67MHz in bandwidth, resulting in a minimum 75nS rise

and fall times at the output current.

A highly stable low noise 2.5V reference voltage is provided

internally for setting the output current. This reference can also

be used as the voltage reference for external ADCs (Analog to

Digital Converters) and/or DACs (Digital to Analog

Converters) which are utilized for converting the analog signals,

such as LIO which represents the output current, into digital

signals, and/or converting the digital signals into analog ones

for setting the analog voltages, such as LIS which sets the

output current.

The ATLS100MA104 is packaged in a 6 sided metal enclosure,

which blocks EMIs (Electro-Magnetic Interferences) to prevent

the controller and other electronics from interfering each other.

This laser driver can be evaluated by our evaluation board,

There are 2 packaging versions available: DIP through hole

package and surface mount type.

Note: The wire for connecting the controller and the cathode

and anode of the laser diode should be less than 10cm. See

Figure 5.1.

types of modules can only be soldered manually on the

board by a solder iron of < 310ºC (590ºF), not go through a

reflow oven process.

Figure 2. Pin Names and Locations

Figure 2 is the actual size top view of the ATLS100MA104,

which shows the pin names and locations. Its thickness is 5mm.

20

VPS

PGND

LDC

LDA

TMPO

LPGD

GND

2.5VR

LIMS

LIS

LIO

SBDN

1

3

4

5

6

2

12

10

9

8

7

11

14.5