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EL6838

Features: ·Two channels for CD or DVD· Voltage-controlled output current source requiring one external set resistor per channel · Rise time = 0.8ns · Fall time = 0.8ns · Channel 2 to 250mA max· Channel 3 to 150mA max · Channel 4 to 100mA max· On chip oscillator with frequency and amplitude control...

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SeekIC No. : 004335609 Detail

EL6838: Features: ·Two channels for CD or DVD· Voltage-controlled output current source requiring one external set resistor per channel · Rise time = 0.8ns · Fall time = 0.8ns · Channel 2 to 250mA max· Chan...

EL6838 Data Sheet

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Part Number:
EL6838
Supply Ability:
5000

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  • 1~5000
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  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

· Two channels for CD or DVD
· Voltage-controlled output current source requiring one external set resistor per channel
· Rise time = 0.8ns
· Fall time = 0.8ns
· Channel 2 to 250mA max
· Channel 3 to 150mA max
· Channel 4 to 100mA max
· On chip oscillator with frequency and amplitude control by use of external resistors to ground
· Oscillator frequency to 600MHz
· Oscillator amplitude to 100mA  P-P
· Single +5V supply (±10%)
· Chip Enables for power savings


Application

* Super Combo drives


Pinout

Connection Diagram


Description

The EL6838 is a high performance, dual output, laser driver for writeable 'super-combo' CD - DVD drives. The ENA pin enables the chip, while the SEL1 pin selects the IOUT pin. Various waveforms can be generated where the amplitude is determined by the currents flowing into IINR , IIN2  , IIN3 , and I IN4 . The timing is determined by the signals at OUTEN2, OUTEN3, and OUTEN4. The oscillator is enabled when OSCEN is high. The amplified IINR  current of the selected channel is enabled when the ENA pin is high. The total output current is the sum of the read current, the enabled write currents, and the oscillator current when enabled.

Usually a voltage DAC will drive a resistor EL6838 that is in series with the IINR , I IN2 , I IN3 , and I IN4  input. The resistor allows the user to optimize the current gain for each channel.


Output write current pulses EL6838 are enabled when a low is applied to the OUTEN2, OUTEN3, or OUTEN4 pin. The write current will flow to the selected output. When SEL1 is high IOUT1  is selected. OUTENR enables read and oscillator current.


The EL6838 RF oscillators frequency is determined by RFREQ1 or RFREQ2 , and its amplitude by RAMP1 or RAMP2.




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