FEATURES
Ultra-Low Noise (RMS): <0.6μARMS@ 0.1Hz ~ 10Hz
High IOUT: 1A
High IOUT Absolute Accuracy: 1000±0.5 (mA) @ VLIS=2.5V
High IOUT Stability: <±0.5mA @ T = −30ºC ~ 60ºC
Independently programmable IOUT and IOUT limit
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.

DESCRIPTION
The ATLS1A104 is an electronic module designed for
driving diode lasers with up to 1A 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 ATLS1A104.
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 ATLS1A104 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 ATLS1A104 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,
ATLS1A103DEV1.0.
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.