ATMEL ATR0807-TCQ

Features
•
•
•
•
•
•
•
•
•
•
•
•
•
Current-controlled Output Current Source with 3 Input Channels
Two Selectable Outputs for Grounded Laser Diodes
Output Current per Write Channel: 350 mA
Total Output Current: 500 mA
500 Ω Channel Input Resistance
On-chip RF Oscillator
Control of Two Different Swings by Use of Two External Resistors
Oscillator Frequency Range from 200 MHz to 500 MHz
Oscillator Swing: 100 mA
Single 5 V Power Supply
Common Enable/Disable Input
TTL/CMOS Control Signals
Small Pb-free QFN16 (4 mm x 4 mm) or SSO16 Package
Applications
•
•
•
•
DVD-ROM with CD-RW Capability
DVD+RW with CD-RW Capability
DVD-RW with CD-RW Capability
Writable Optical Drives
Description
The ATR0807 is a laser diode driver for the operation of two different grounded laser
diodes for DVD-RW/DVD+RW (650 nm) and CD-RW (780 nm). 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 and switched to one of the two IOUTA or IOUTB outputs by the select input
SELA. Each write channel (channel 2 and 3) can contribute up to 350 mA to the total
output current, up to 500 mA. The read channel can contribute up to 150 mA. Total
gains of 100 (read channel), 250 (channel 2 and 3) are 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.
Three Channel
Laser Driver
with RF
Oscillator and
Two Outputs
ATR0807
(Summary)
Rev. 4723CS–DVD–07/03
1
Figure 1. Block Diagram
I3
NE3
Channel 3
I2
NE2
Channel 2
IR
IOUTA
IOUTB
Read channel
ENABLE
ENOSC
RF oscillator
RF RSA RSB
2
SELA
ATR0807
4723CS–DVD–07/03
ATR0807
Pin Configuration SSO16
Figure 2. Pinning SSO16
IR
I2
I3
RF
NE2
NE3
ENABLE
ENOSC
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
VCC1
IOUTA
GND
RSA
RSB
IOUTB
SELA
VCC2
Pin Description
Pin
Symbol
Type
1
IR
Analog
Input current, bias voltage approximately GND
Function
2
I2
Analog
Input current, bias voltage approximately GND
3
I3
Analog
Input current, bias voltage approximately GND
4
RF
Analog
External resistor to GND sets frequency of oscillator
5
NE2
Digital
Digital control of channel 2 (low active)
6
NE3
Digital
Digital control of channel 3 (low active)
7
ENABLE
Digital
Enables output current (high active)
8
ENOSC
Digital
Enables RF oscillator (high active)
9
VCC2
Supply
+5 V power supply for IOUT
10
SELA
Digital
High: selects IOUTA, RSA
Low: selects IOUTB, RSB
11
IOUTB
Analog
Output current source B for laser diode
12
RSB
Analog
External resistor to GND sets swing of oscillator B
13
RSA
Analog
External resistor to GND sets swing of oscillator A
14
GND
Supply
Ground
15
IOUTA
Analog
Output current source A for laser diode
16
VCC1
Supply
+5 V power supply for IOUT and circuit
3
4723CS–DVD–07/03
Pin Configuration QFN16
I2
IR
VCC1
IOUTA
Figure 3. Pinning QFN16
1
2
3
4
16 15 14 13
12
11
10
9
5 6 7 8
GND
RSA
RSB
IOUTB
ENABLE
ENOSC
VCC2
SELA
I3
RF
NE2
NE3
Pin Description
4
Pin
Symbol
Type
Function
1
I3
Analog
Input current, bias voltage approximately GND
2
RF
Analog
External resistor to GND sets frequency of oscillator
3
NE2
Digital
Digital control of channel 2 (low active)
4
NE3
Digital
Digital control of channel 3 (low active)
5
ENABLE
Digital
Enables output current (high active)
6
ENOSC
Digital
Enables RF oscillator (high active)
7
VCC2
Supply
+5 V power supply for IOUT
8
SELA
Digital
High: selects IOUTA, RSA
Low: selects IOUTB, RSB
9
IOUTB
Analog
Output current source B for laser diode
10
RSB
Analog
External resistor to GND sets swing of oscillator B
11
RSA
Analog
External resistor to GND sets swing of oscillator A
12
GND
Supply
Ground
13
IOUTA
Analog
Output current source A for laser diode
14
VCC1
Supply
+5 V power supply for circuit
15
IR
Analog
Input current, bias voltage approximately GND
16
I2
Analog
Input current, bias voltage approximately GND
Paddle
GND
Supply
Ground
ATR0807
4723CS–DVD–07/03
ATR0807
Absolute Maximum Ratings
Parameters
Symbol
Value
Unit
Supply voltage
VCC
-0.5 to +6.0
V
Input voltage at any input
Vin
-0.5 to VCC +0.5
V
Power dissipation
Pmax
0.7 (1) to 1 (2)
W
Output voltage
Vout
-0.5 to VCC -1
V
Junction temperature
Tj
150
°C
Storage temperature
Tstg
-65 to +125
°C
Symbol
Value
Unit
(1)
K/W
Symbol
Value
Unit
VCC
4.5 to 5.5
V
IIR, II2, II3
IIR < 2.0, II2 = II3 < 1.5
mA
RF
>3
kW
RSA, RSB
>1
kW
Tamb
0 to +70
°C
Notes:
1. RthJA £ 115 K/W at Tamb = 70°C
2. RthJA £ 115 K/W at Tamb = 25°C
Thermal Resistance
Parameters
Junction ambient
Notes:
RthJA
115
1. Measured with multi-layer test board (JEDEC standard)
Recommended Operating Conditions
Parameters
Supply voltage
Input current
External resistor to GND to set oscillator
frequency
External resistor to GND to set oscillator swing
Operating temperature range
5
4723CS–DVD–07/03
Ordering Information
Extended Type Number
Package
Remarks
ATR0807-TCQ
Pb-free SSO16
Taped and reeled
ATR0807-PEQ
Pb-free QFN16 (4 mm x 4 mm)
Taped and reeled
Package SSO16
6
ATR0807
4723CS–DVD–07/03
ATR0807
Package QFN16 (4 mm x 4 mm)
7
4723CS–DVD–07/03
Atmel Headquarters
Atmel Operations
Corporate Headquarters
Memory
2325 Orchard Parkway
San Jose, CA 95131
TEL 1(408) 441-0311
FAX 1(408) 487-2600
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
Chinachem Golden Plaza
77 Mody Road Tsimhatsui
East Kowloon
Hong Kong
TEL (852) 2721-9778
FAX (852) 2722-1369
Japan
9F, Tonetsu Shinkawa Bldg.
1-24-8 Shinkawa
Chuo-ku, Tokyo 104-0033
Japan
TEL (81) 3-3523-3551
FAX (81) 3-3523-7581
2325 Orchard Parkway
San Jose, CA 95131
TEL 1(408) 441-0311
FAX 1(408) 436-4314
Microcontrollers
2325 Orchard Parkway
San Jose, CA 95131
TEL 1(408) 441-0311
FAX 1(408) 436-4314
La Chantrerie
BP 70602
44306 Nantes Cedex 3, France
TEL (33) 2-40-18-18-18
FAX (33) 2-40-18-19-60
ASIC/ASSP/Smart Cards
Zone Industrielle
13106 Rousset Cedex, France
TEL (33) 4-42-53-60-00
FAX (33) 4-42-53-60-01
RF/Automotive
Theresienstrasse 2
Postfach 3535
74025 Heilbronn, Germany
TEL (49) 71-31-67-0
FAX (49) 71-31-67-2340
1150 East Cheyenne Mtn. Blvd.
Colorado Springs, CO 80906
TEL 1(719) 576-3300
FAX 1(719) 540-1759
Biometrics/Imaging/Hi-Rel MPU/
High Speed Converters/RF Datacom
Avenue de Rochepleine
BP 123
38521 Saint-Egreve Cedex, France
TEL (33) 4-76-58-30-00
FAX (33) 4-76-58-34-80
1150 East Cheyenne Mtn. Blvd.
Colorado Springs, CO 80906
TEL 1(719) 576-3300
FAX 1(719) 540-1759
Scottish Enterprise Technology Park
Maxwell Building
East Kilbride G75 0QR, Scotland
TEL (44) 1355-803-000
FAX (44) 1355-242-743
e-mail
literature@atmel.com
Web Site
http://www.atmel.com
© Atmel Corporation 2003.
Atmel Corporation makes no warranty for the use of its products, other than those expressly contained in the Company’s standard warranty
which is detailed in Atmel’s Terms and Conditions located on the Company’s web site. The Company assumes no responsibility for any errors
which may appear in this document, reserves the right to change devices or specifications detailed herein at any time without notice, and does
not make any commitment to update the information contained herein. No licenses to patents or other intellectual property of Atmel are granted
by the Company in connection with the sale of Atmel products, expressly or by implication. Atmel’s products are not authorized for use as critical
components in life support devices or systems.
Atmel ® is the registered trademark of Atmel.
Other terms and product names may be the trademarks of others.
Printed on recycled paper.
4723CS–DVD–07/03
xM