ATLS1A103 Datasheet | AT

Analog Technologies Features Ultra Low Noise: <10µA- High Current without Heat Sink: 1A High Absolute Accuracy: <0.1% Low Noise Constant Current Laser Driver ATLS1A103 The controller has 2 types of packages: through hole mount and surface mount. The latter saves PCB space the controller takes. Figure 1 is the actual size top view of the ATLS1A103, which shows the pin names and locations. Its thickness is 5mm. SPECIFICATIONS Maximum output current: Output current noise: (0.1Hz to 0.5MHz RMS) Current set voltage range: Current limit set voltage range: Modulation response bandwidth: Minimum drop out voltage: 1A <10µA 0 to 2.5V 0 to 0.5V 350KHz 0.3V + 0.5×Iout (Iout: output current) Power supply voltage range: Operating case temperature: OPERATION PRINCIPLE Figure 2 is the block diagram of the controller. The shut down control circuit accept signals from 3 sources: external shut down, over-current and over-temperature signals. When one of these signals is activated, the controller is shut down. Only when all these 3 signals go up, the soft-start circuit starts enabling the low noise driver. The temperature sensor circuit turns down the controller upon detecting the temperature to be 120°C. The current limiter circuit monitors the output current and shuts down the controller upon detecting the output current exceeds the pre-set value. When controller is shut down, the voltage reference is also shut down. SDN 100KΩ .. High Stability: 100ppm/°C Dual Modulation Ports: High/Low Speed plete Shielding pact Size SMT Package Available - Total RMS between 0.1Hz to 0.5MHz. APPLICATIONS Drive laser diodes with low noise, including DPSSL, EDFA, fiber laser, direct diode lasers, etc. DESCRIPTION The ATLS1A103 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. It uses two drivers, one is switch mode and the other is linear mode. The former results in...