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.
| 芯片型号 | 产品状态 | 温度范围 | 封装尺寸图 | 潮湿敏感度等级MSL | 美元价格US $ |
| EL6145CUZ | 量产 | 民用级 | 16 Ld QSOP | 3 | 价格录入中 |
| EL6145CUZ-T13 | 量产 | 民用级 | 16 Ld QSOP T+R | 3 | 价格录入中 |
| EL6145CUZ-T7 | 量产 | 民用级 | 16 Ld QSOP T+R | 3 | 价格录入中 |
| EL6145CU | 停产 | 民用级 | 16 Ld QSOP | 1 | N/A |
| EL6145CU-T13 | 停产 | 民用级 | 16 Ld QSOP T+R | 1 | N/A |
| EL6145CU-T7 | 停产 | 民用级 | 16 Ld QSOP T+R | 1 | N/A |