Maker : ATMEL Corporation
Part No. : T0810

  Datasheet PDF : T0810.pdf
  Cross Reference : T0810 Cross Reference
  Buy Component : T0810 Find Stock and Price

Shortcut : T0810  T0810xH  T0812xH 

Product Information

T0810 3-Channel Laser Driver with RF Osc. and APC Amplifier Description www.datasheet4u.com The T0810 is a laser diode driver for the operation of a grounded laser diode for CD-RW drives. It includes three channels for three different optical power levels which are controlled by a separate IC. The read channel generates a continuous output level whereas the channels 2 and 3 are provided as write channels with very fast switching speeds. Write current pulses are enabled when a ‘low’ signal is applied to the NE Pins. All channels are summed together at the IOUT Pin. Each channel can contribute up to 150 mA to the total output current of up to 200 mA. A total gain of 400 mA is provided between each reference current input and output. Although the reference inputs are current inputs, voltage control is possible by using external resistors. An on-chip RF oscillator is provided to reduce laser mode hopping noise during read mode. Frequency and swing can be set by two external resistors. Oscillation is enabled by a ‘high’ at the ENOSC Pin. Complete output current and oscillator switch-off is achieved by a ‘low’ at the ENABLE input. The T0810 also includes a fast settling APC (Adaptive Power Control) transimpedance amplifier. It is provided to interface between the front end monitor photo diode and the ALPC (Adaptive Laser Diode Power Controller) circuit. Electrostatic sensitive device. Observe precautions for handling. Features D Current-controlled output current source with 3 input channels D Low-power consumption D Output current per channel to 150 mA D Total output current to 200 mA D Rise time 1.0 ns / fall time 1.1 ns D On-chip RF oscillator D Control of frequency and swing by use of 2 external resistors D Oscillator frequency range from 200MHz to 500 MHz D Oscillator swing to 100 mA D Fast settling APC amplifier D Single 5-V power supply D Common enable / disable input D TTL/CMOS control signals D Small SSO16 package Application D CD-RW drives D Writable optical drives Block Diagram PDIN APC VREF VOUT I3 NE3 Channel 3 I2 NE2 Channel 2 IOUT IR ENABLE Read channel ENOSC RF RF oscillator RS Figure 1. Block diagram Rev. A5, 08-Aug-01 1 (9) T0810 Ordering Information Extended Type Number T0810-TCQ www.datasheet4u.com Package SSO16 Taped and reeled Remarks Pin Description Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Symbol VOUT VREF IR RF I2 I3 NE2 NE3 VCC ENOSC Function APC amplifier output Reference voltage input Inp. current, bias voltage approx. GND External resistor to GND sets oscillator frequency Inp. current, bias voltage approx. GND Inp. current, bias voltage approx. GND Digital control of channel 2 (low active) Digital control of channel 3 (low active) + 5 V power supply Enables RF oscillator (high active) VOUT VREF IR RF I2 I3 NE2 NE3 1 2 3 4 16 15 14 13 PDIN VCC IOUT GND RS ENABLE ENOSC VCC T0810 5 6 7 8 12 11 10 9 Figure 2. Pinning SSO16 ENABLE Enables output current (high active) RS GND IOUT VCC PDIN External resistor to GND sets oscillator swing Ground Output current source for laser diode + 5 V power supply Photo diode input Absolute Maximum Ratings Parameter Supply voltage Input voltage at IR, I2, I3 Input voltage at NE2, NE3, ENOSC Output voltage Power dissipation Junction temperature Storage temperature range 1) RthJA ≤ 80 K/W Symbol VCC VIN1 VIN2 VOUT PMAX TJ TSTG Value –0.5 to +6.0 –0.5 to + 0.5 –0.5 to VCC + 0.5 –0.5 to VCC –1 1 1) Unit V V V V W _C _C 150 –65 to +125 2 (9) Rev. A5, 08-Aug-01 T0810 Thermal Resistance Parameter Junction ambient www.datasheet4u.com Symbol RthJA Value 150 Unit K/W Recommended Operating Conditions Parameter Supply voltage range Input current External resistor to GND to set oscillator frequency External resistor to GND to set oscillator swing Operating temperature range Symbol VCC IIR/II2/II3 RF RS Tamb Value 4.5 to 5.5 < 0.4 >3 > 100 0 to +70 Unit V mA kΩ Ω _C Electrical Characteristics : General VCC = 5 V, Tamb =25_C...

Link URL