The price listed is the manufacturer's suggested retail price for quantities of 1K units. However, prices in today's market are fluid and may change without notice.
MSL = Moisture Sensitivity Level - per IPC/JEDEC J-STD-020
SMD = Standard Microcircuit Drawing
Description
The EL6145 is a high performance three-channel laser driver that provides controlled current to a grounded laser diode. Channels 2 and 3 should be used as the write channels, with switching speeds of approximately one nanosecond rise/fall time. All three channels are summed together at the IOUT output, allowing the user to create multilevel waveforms in order to optimize laser diode performance. 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 to become a current source at pin IOUT.
An on-chip 500MHz oscillator is provided to allow output current modulation when in any mode. This is turned on only when the OSCEN and OUTEN pins are held high. 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).
Output current pulses are enabled when an 'L' signal is applied to the OUTEN pin. No output current flows when OUTEN is 'H', and additional laser diode protection is provided since the OUTEN input will float high when open. Complete IOUT shut-off is also achieved by holding the ENABLE pin low, which will override all other control pins.
The EL6145 also includes a fast-settling APC amplifier designed to interface directly with the front end monitor diode and the sample-and-hold amplifier for read and write power control. Its 100MHz bandwidth and 30ns settling time enable up to 16X CD-RW design.
Key Features
"Shrink-small" outline package
Voltage-controlled output current source, requiring one external set resistor per channel
Auto oscillator on-off with OUTEN signals
Rise time = 0.8ns
Fall time = 0.8ns
On-chip oscillator with frequency and amplitude control by use of external resistors to ground
Oscillator to 500MHz
Oscillator to 100mAPK/PK
Single +5V supply (±10%)
Disable feature for power-up protection and power savings
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