ATLS1A102 Datasheet | AT

Analog Technologies Features Ultra Low Noise: <10µA- High Current without Heat Sink: 1A High Absolute Accuracy: <0.1% High Stability: 100ppm/°C Dual Modulation Ports: High/Low Speed Low Drop Out Voltage: 1V plete Shielding pact Size SMT Package Available Low Noise Constant Current Laser Driver ATLS1A102 SDN GND 2P5V LISL P5V LISH 1 2 3 4 5 6 12 11 10 9 8 7 14.5 .. LPGD LIO VPS PGND 19.4 LDA LDC Figure 1 Pin Names and Locations The controller has 2 types of mounting packages: through hole and surface mount. The latter saves PCB space the controller takes. Figure 1 is the actual size top view of the ATLS1A102D, which shows the pin names and locations. Its thickness is 5mm. SPECIFICATIONS Maximum output current: Output current noise: (0.1Hz to 0.5MHz RMS) Low speed current set voltage: (on LISL pin) High speed current set voltage: (on LISL pin) 1A <10µA 0 to 2.5V 0 to 0.5V 0.08Hz - Total RMS between 0.1Hz to 0.5MHz. APPLICATIONS Driving diode lasers with low noise, including DPSSLs, EDFAs, fiber lasers, diode laser modules, etc. DESCRIPTION The ATLS1A102 is an electronic module designed for driving diode lasers with up to 1A low noise current. The output voltage is 1.5V to 4V when powered by a 5V power supply. The ATLS1A102 has two input ports for modulating the output current: one for low speed of up to 0.08Hz bandwidth and the other high speed modulation of up to 300KHz. The former is for CW (Continuous Wave) operation and the latter is for modulated operation. A high stability low noise 2.5V reference voltage is provided internally for setting the output current. This reference can also be as the voltage reference for external ADCs (Analog to Digital Converters) and DACs (Digital to Analog Converters), which might be used for monitoring and/or setting the laser current. The shut down pin can turn the controller electronically without disconnecting the power supply. There is an output port, LIO (pin 11), dedicated for monitoring the...