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EL6252CY Datasheet(PDF) 1 Page - Elantec Semiconductor |
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EL6252CY Datasheet(HTML) 1 Page - Elantec Semiconductor |
1 / 2 page ©2000 Elantec Semiconductor, Inc. North America: 1-888-352-6832 X 311 Asia: +85-45-682-5820 Europe: +44-18-977-6020 Complete Product Specifications Elantec Technical Support: Features • Mini-Small Package Outline • Voltage-controlled output current source requiring one external set resistor per channel • Current-controlled output current source. • Rise time = 1.0 ns • Fall time = 1.1 ns • On chip oscillator with frequency and amplitude control by use of external resistors to ground • Oscillator to 500 MHz • Oscillator to 100 mA pk/pk • Single +5V supply (±10%) • Current amplification = 100 • CMOS control signals Applications • MO drives • Mini-Disc drives • Writable optical drives • Laser diode current switching Ordering Information Part No Temp. Range Package Outline # EL6252CY 0°C to +70°C MSOP10 MDP0043 EL6252C - Product Brief 2-Channel laser diode Driver + Oscillator General Description The EL6252C is a high-performance two channel laser diode current amplifier that provides controlled current to a grounded laser diode. The write amplifier can provide over 200mA of DC or pulsed current. The R and W channels have switching speeds of approximately one nanosecond rise/fall time and are summed together at the IOUT output. The level of the output current is set by an analog voltage applied to an external resistor which converts the voltage into a current at the IIN pin (virtually ground). The current seen at this pin is then amplified by 100X to become a current source at pin IOUT. An on-chip 500 MHz oscillator is provided to allow current modula- tion when in the read mode. This is turned on when the OSCEN pin is held high (floating not recommended). Complete control of amplitude and frequency is set by two external resistors connected to ground at pins RFREQ and RAMP (see graphs in this data sheet for further explanation). Write current pulses appear when an ‘L’ signal is applied to the OUT- ENW pin. The external resistors allow the user to accurately and independently set each amplifier transconductance by applying a voltage to each resistor, without restriction on the voltage range, thus ensuring broad voltage DAC compatibility. Alternatively, the IIN pin can be biased from a current DAC or other current source. Connection Diagram 1 2 3 4 10 9 8 7 5 6 VCC IOUT GND RAMP VCC IINR IINW RFREQ OUTENW OSCEN |
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