T0820-TCQ

The T0820-TCQ is one of the T0820 series.The T0820-TCQ is a laser diode driver for the operation of a grounded laser diode for writable optical drives.It includes four channels for four different optical power levels which are controlled by a separate IC.The read channel generates a continuous output level whereas channels 2 to 4 are provided as write channels with very fast switching speeds.Write current pulses are enabled when a 'low'signal is applied to the NE pins.All channel are summed together at the IOUT pin.Read channel 2 can contribute up to 150mA channels 3 and 4 up to 200 mA to the total output current of up to 300mA.A total gain of 100 is provided between each reference current input and the output.Although the reference inputs are current inputs voltage control is possible by using external resistors.

Features of the T0820-TCQ are:(1)current-controlled ouput current source with 4 input channels; (2)low-power consumption; (3)output current per channel up to 150mA;output current up to 200mA ,channel 3 and channel 4 (4)total ouput current to 300mA; (5)rise time 1.0 ns,fall time 1.1 ns; (6)on-chip rf oscillator; (7)control control frequency and swings by use of 2 external resistors; (8)oscillator frequency range from 200MHz to 600 MHz; (9)oscillator swing to 100 mA; (10)single 5V power supply ; (11)common enable/disable input ; (12)TTL/CMOS control signals; (13)small PB-free QFN16(4mm*4mm) or SSO16 package.

The absolute maximum ratings of the T0820-TCQ can be summarized as:(1)supply voltage:-0.5~6.0V; (2)input voltage at IR,12,13:-0.5~0.8V; (3)input voltage at NER,NE2 NE3,ENOSC:-0.5~VCC+0.5V; (4)output voltage:-0.5~VCC-1 V; (5)power dissipation:0.7~1W; (6)junction temperature:150; (7)storage temperature range:-65~125.If you want to know more information about T0820-TCQ such as the electrical characteristics ,please download the datasheet in www.seekdatasheet.com .