General Description

The EL6201C is a solid state high performance laser modulation oscillator with external resistor adjustable frequency and amplitude. The EL6201C is available in both the 8-pin MSOP and the 5-pin SOT23, to enable device placement close to the laser for reduced EMI.

The oscillator frequency is set by connecting a single external resistor from the RFREQ pin to ground. The oscillator current output amplitude is set by connecting a single external resistor from the RAMP pin to ground. The oscillator in the MSOP package also contains a high speed output disable function using the OE pin. The OE pin can be driven by a high speed timing signal to control precise laser modulation during read/write operations. The output current is disabled when a logical zero ‘L’ is driven to the CE pin. Supply current is reduced to microamps when CE = LOW.

The EL6201C has internal supply bypass capacitors to reduce oscilla tion noise spread through supply connections.

Features

? Small SOT-23 and MSOP-8 packages

? Frequency to 430MHz min.

? Amplitude to 25mAP-P min.

? Output tristate function (MSOP-8)

? Power-down function (MSOP-8)

? Single +3.5V to +5.0V supply

? Simple to use - only two external resistors required

? Independent resistor setting for frequency and amplitude.

Applications

? DVD players

? DVD-ROM drives

? DVD-RAM drives

? CD-RW drives

? MO drives

? Optical pickup head assembly

? Laser diode modulation

? Local oscillator

? Communications lasers