T0806-TCQ ATMEL [ATMEL Corporation], T0806-TCQ Datasheet

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T0806-TCQ

Manufacturer Part Number
T0806-TCQ
Description
3 CHANNEL LASER DRIVER WITH RF OSCILLATOR AND 2 OUTPUTS
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet

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Part Number:
T0806-TCQG
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PHILIPS
Quantity:
2
Features
Applications
Description
The T0806 is a laser diode driver for the operation of two different grounded laser
diodes for DVD-RAM (650 nm) and CD-RW (780 nm) drives. It includes three chan-
nels for three different optical power levels which are controlled by a separate IC. The
read channel generates a continuous output level whereas channels 2 and 3 are pro-
vided 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 and switched to one of the two outputs IOUTA or IOUTB by the select input
SELA. Each channel can contribute up to 250 mA to the total output current of up to
300 mA. A total gain of 100 is provided between each reference current input and the
selected 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. Swing can be set independently for the two selectable outputs with two different
resistors. Oscillation is enabled by a high signal at the ENOSC pin. Complete output
current and oscillator switch-off is achieved by a low signal at the ENABLE input.
Figure 1. Block Diagram
Current-controlled Output Current Source, 3 Input Channels
Two Selectable Outputs for Grounded Laser Diodes
Output Current per Channel up to 250 mA
Total Output Current to 300 mA (Minimum)
Rise Time 1.0 ns, Fall Time 1.1 ns
On-chip RF Oscillator
Control of 2 Different Swings by Use of 2 external Resistors
Oscillator Frequency Range from 200 MHz to 600 MHz
Oscillator Swing to 100 mA
Single 5 V Power Supply
Common Enable/Disable Input
TTL/CMOS Control Signals
Small PB-free QFN16 (4 mm
DVD-ROM with CD-RW Capability (Combo Drives)
Combo Drives with CD and DVD Writing Capability
ENABLE
ENOSC
NE3
NE2
IR
I3
I2
RF
Read channel
4 mm) or SSO16 Package
RF oscillator
Channel 3
Channel 2
RSA
RSB
SELA
IOUTA
IOUTB
3-Channel Laser
Driver with
RF Oscillator
and 2 Outputs
T0806
Summary
Rev. 4522ES–DVD–01/04

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T0806-TCQ Summary of contents

Page 1

... Combo Drives with CD and DVD Writing Capability Description The T0806 is a laser diode driver for the operation of two different grounded laser diodes for DVD-RAM (650 nm) and CD-RW (780 nm) drives. It includes three chan- nels for three different optical power levels which are controlled by a separate IC. The read channel generates a continuous output level whereas channels 2 and 3 are pro- vided as write channels with very fast switching speeds ...

Page 2

... Analog 16 VCC1 Supply T0806 T0806 NE2 5 6 NE3 7 ENABLE ENOSC 8 Type Function Input current, bias voltage approximately GND Input current, bias voltage approximately GND Input current, bias voltage approximately GND External resistor to GND sets oscillator frequency of oscillator A ...

Page 3

... External resistor to GND sets swing of oscillator B External resistor to GND sets swing of oscillator A Ground Output current source A for laser diode +5 V power supply for IOUT and circuit Input current, bias voltage approximately GND Input current, bias voltage approximately GND Ground GND RSA RSB IOUTB T0806 3 ...

Page 4

... Parameters Junction ambient Recommended Operating Conditions Parameters Supply voltage range Input current External resistor to GND to set oscillator frequency External resistor to GND to set oscillator swing Operating temperature range Ordering Information Extended Type Number T0806-TCQ T0806-PEQG T0806 4 Symbol V –0 –0.5 to +1.0 IN1 V –0 ...

Page 5

... Package Information 4522ES–DVD–01/04 T0806 5 ...

Page 6

... T0806 6 4522ES–DVD–01/04 ...

Page 7

Atmel Corporation 2325 Orchard Parkway San Jose, CA 95131, USA Tel: 1(408) 441-0311 Fax: 1(408) 487-2600 Regional Headquarters Europe Atmel Sarl Route des Arsenaux 41 Case Postale 80 CH-1705 Fribourg Switzerland Tel: (41) 26-426-5555 Fax: (41) 26-426-5500 Asia Room 1219 ...

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