FEATURES
Ultra Low Noise: 2.5μAP-P @0.1Hz to 10Hz
High Current without Heat Sink: 250mA
High Absolute Accuracy: <0.1%
High Stability: <100ppm/°C
Programmable Current Limit
Complete Shielding
Compact Size
100 % Lead (Pb)-free and RoHS Compliant
DIP and SMT Packages Available

DESCRIPTION
The ATLS250MA103 is an electronic module designed for
driving diode lasers with up to 250mA low noise current.
Figure 1 shows physical photo of ATLS250MA103.The
output voltage is 0.4V to VVPS − 1V when powered by a 5V
power supply.
When the maximum power consumed by the controller is
maintained to <1W, it does not require a heat sink to operate.
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 ATLS250MA103 can be set by an
input voltage linearly or modulated by an external large signal
of up to 1MHz in bandwidth, resulting in a minimum 170nS
rise and fall times (Large signal) 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 ATLS250MA103 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.