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A nalog Technologies, Inc. LDA1-CP1 Dual Mode Laser Driver

Main features: high power, high precision, high stability, high efficiency, and small package. Applications: DPSS, EDFA, and instrumentations. Part number:LDA1-CP1 Maximum output current:2A Maximum output voltage on LDA: 0.9 × VpsLaser current and power indication voltage: 0 to 2.5VLaser current indication absolute accuracy: ° C to +85 ° CModule dimension (approximately):25.4mm ± 0.5%Laser current set-point voltage:0 to 2.5V Laser power set-point voltage:0 to 2.5V Current output noise: 0.05% (RMS)@2A Power supply input voltage:3.2V to 5.5V Operation mode: ACC (Automatic Current Control) and APC (Automatic Power Control) Operating temperature: 0 × 20 mm × 4.6mm Pin Descriptions Figure 2 illustrates the pin assignment on the module and basic application schematics. Pin 1SDNG , shut down, digital input. Negative logic, >2.3V = enable, <0.5V = shut down, norminalthreshold voltage = 1V. Its internal circuit is shown in Figure 2. The diode is for shortening the shutdown time. Pin 2CLPGD , control loop good indication, digital output. A HI level indicates control loop locked.This pin is an open drain output and pulled up by a 20K resistor to VPS. Pin 3P/CM, power/currentmode indication, analog output. HI = power mode, LO = current mode.Low output impedance, capable of driving 20mA load. Pin 4GND , signal ground pin. Connect ADC and DAC grounds to here. Pin 52.5V , reference voltage, analog output. It is used by the internal DACs as the reference voltage. It can source and sink 5mA current with 20ppm/ ° C stability max. Pin 6 LIS , laser current set-point voltage, analog input. 0V to 2.5V sets the output current from 0 to 2A linearly. The input impedance of this pin is 100K Ω . This pin can be set by an external analogsignal source, such as the output of a closed-looped op-amp, POT, or DAC. Pin 7 LIO , laser current output indication, analog output. 0V to 2.5V indicates the laser current of from 0 to 2A linearly.
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