The ATLSxA218D is a series of high efficiency constant current laser drivers for driving one or multiple laser diode arrays. It is shielded in metal case, emits zero EMI (ElectroMagnetic Interference), and is packaged in small DIP package. The laser driver series includes ATLS8A218D, ATLS10A218D and ATLS15A218D. The evaluation board introduced by this application note, ATLS218EV1.0, is designed for evaluating these laser drivers conveniently. It is recommended to read this application note with the ATLSxA218D datasheets which provides more detail information about the specifications and application guidelines for the laser drivers.