Page 1
INTEGRATED CIRCUITS
DATA SH EET
TZA1024
Data amplifier and laser supply
circuit for CD audio and video
optical systems (ADALAS)
Product specification
File under Integrated Circuits, IC01
1998 Oct 30
Page 2
Philips Semiconductors Product specification
Data amplifier and laser supply circuit for CD
audio and video optical systems (ADALAS)
FEATURES
• Supports a wide range of voltage output mechanisms
• RF amplifier designed for audio and video applications
with data rates up to a maximum of n = 4 times speed
• Programmable RF gain for CD-Audio/Video (CD-A/V)
and CD-Read/Write (CD-R/W) discs
• Adjustable equalizer for n = 1 or n = 2 times speed
• Fully Automatic Laser Power Control (ALPC) including
stabilization plus a separate laser supply voltage for
power efficiency
• Adjustable current range of ALPC output
• Automatic N- or P-substrate monitor diode selection
• Adjustable laser bandwidth and laser switch-on current
slope using external capacitor
• Protection circuit to prevent laser damage due to laser
supply voltage dip
• Optimized interconnection between data amplifier and
Philips’ digital signal processor CD10 (SAA7324)
• Wide supply voltage range
• Power-down switch to reduce power consumption
during standby
• Low power consumption.
The RF bandwidth allows this device to be used in CD-A/V
and CD-R/W applications with a data rate up to a
maximum of n = 4 times speed. The RF gain can be
adapted for CD-A/V discs or CD-R/W discs by means of
the gain select signal.
The equalizer can be adjusted for n = 1 or n = 2 times
speed with the equalizer/speed select signal. For n = 4
times speed the RF is not equalized.
The TZA1024 can be adapted to a wide range of voltage
output mechanisms by means of external resistors.
The ALPC circuit will maintain control over the laser diode
current. With an on-chip reference voltage generator, a
constant and stabilized output power is ensured
independent of ageing. The ALPC can accommodate
N- or P-substrate monitor diodes.
TZA1024
GENERAL DESCRIPTION
The TZA1024 is a data amplifier and laser supply circuit for
voltage output mechanisms found in a wide range of audio
and video CD systems. The device contains an RF
amplifier and an automatic laser power control circuit.
The preamplifier forms a versatile, programmable
interface for voltage output CD mechanisms to the Philips’
digital signal processor CD10 (SAA7324).
A separate supply voltage connection for the laser allows
the internal power dissipation to be reduced by connecting
a low voltage supply. The laser output current range can
be optimized to fit the requirements of the laser diode by
means of one external resistor. When a DC-to-DC
converter is used, in combination with the control loop of
the ALPC, the adjustable output current range provides
the possibility to compensate for the extra gain a DC-to-DC
converter introduces in the control loop.
1998 Oct 30 2
Page 3
Philips Semiconductors Product specification
Data amplifier and laser supply circuit for CD
TZA1024
audio and video optical systems (ADALAS)
QUICK REFERENCE DATA
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
Supplies
V
DD
I
DD
V
DD(L)
RF amplifier
t
d(f)(RF)
Laser supply circuit
I
o(LASER)(max)
V
i(mon)
Temperature range
T
oper
supply voltage 2.4 − 5.5 V
supply current − 3 − mA
laser supply voltage 2.4 − 5.5 V
RF flatness delay EQSEL = LOW; n = 1 −− 10 ns
EQSEL = HIGH; n = 2 −− 5ns
EQSEL = open-circuit;
−− 2.5 ns
n = 4; non equalized
maximum laser output current V
DD(L)
− V
o(LASER)
= 0.55 V 80 −−mA
monitor input voltage
N-substrate monitor diode − 0.150 − V
P-substrate monitor diode − V
− 0.150 − V
DD
operating temperature 0 − 70 °C
ORDERING INFORMATION
TYPE
NUMBER
NAME DESCRIPTION VERSION
PACKAGE
TZA1024T SO14 plastic small outline package; 14 leads; body width 3.9 mm SOT108-1
1998 Oct 30 3
Page 4
Philips Semiconductors Product specification
Data amplifier and laser supply circuit for CD
audio and video optical systems (ADALAS)
BLOCK DIAGRAM
handbook, full pagewidth
CDRW
DIN
11
5
V
DD
13
1×
4×
TZA1024
V
DD
12
EQSEL
9
RFFB
10
RFEQO
MON
2×
250
TZA1024
V/I
4
GND
V
GAP
(1)
V/I
26
V
DD(L)
kHz
V
DD
14
MGR517
8
CMFB
1
LD
RGADJ
3
CFIL
7
PWRON
(1) Band gap reference voltage.
Fig.1 Block diagram.
1998 Oct 30 4
Page 5
Philips Semiconductors Product specification
Data amplifier and laser supply circuit for CD
audio and video optical systems (ADALAS)
PINNING
SYMBOL PIN DESCRIPTION
LD 1 current output to laser diode
V
DD(L)
2 laser supply voltage
CFIL 3 external filter capacitor
MON 4 laser monitor diode input
DIN 5 central diode input
GND 6 ground
PWRON 7 power-on select input
CMFB 8 common mode feedback voltage
input
RFFB 9 external RF feedback resistor
RFEQO 10 RF amplifier output
CDRW 11 gain select input for CD-A/V, CD-R/W
EQSEL 12 equalizer/speed select input
(n = 1, 2 or 4)
V
DD
13 supply voltage
RGADJ 14 external laser supply gain adjust
resistor
handbook, halfpage
LD
V
DD(L)
CFIL
MON
DIN
GND
PWRON
1
2
3
4
5
6
7
TZA1024
MGR518
14
13
12
11
10
9
8
RGADJ
V
DD
EQSEL
CDRW
RFEQO
RFFB
CMFB
The gain of the RF amplifier can be adjusted by the
external input resistors. Fig.3 shows the simplified
schematic which can be used to determine the RF gain.
The signal is AC coupled to the RF amplifier. The formula
to determine the gain is shown below:
G
where:
The gain can be increased by a factor 4 by making
pin CDRW HIGH. The value of Z
(CDRW = LOW) and 38 kΩ for CD-R/W (CDRW = HIGH).
The equalizer/bandwidth section can be switched between
n = 1, n = 2 (inclusive the corresponding equalizer) or
n = 4 (inclusive the required bandwidth limitation) times
speed.
The DC output level of the amplifier can be set by applying
a DC voltage on the common mode feedback pin CMFB.
Since the input signal is AC-coupled the RF output voltage
will swing (symmetrically) around this DC level.
The coupling of the TZA1024 to the signal processor
(SAA7324) can be either AC or DC. When an AC-coupling
is chosen (see Fig.8) the minimum supply voltage can be
applied. When a DC-coupling is chosen (see Fig.9) a
minimum supply voltage of 2.8 V is required.
Z
tr RF()
n–
×=
RF
-----------------R2
GRF is the RF amplifier gain
n is the number of input resistors
Z
is the transimpedance of the amplifier (Ω)
tr(RF)
R2 is the value of the input resistors (Ω).
is 9.8 kΩ for CD-A/V
tr(RF)
TZA1024
(1)
Fig.2 Pin configuration.
FUNCTIONAL DESCRIPTION
The TZA1024 consists of two sections, the RF amplifier
and the automatic laser power control circuit.
RF amplifier
The RF amplifier consists of a current input amplifier, an
equalizer/bandwidth section and a transimpedance output
amplifier with an external feedback resistor of 10 kΩ(fixed
value).
1998 Oct 30 5
handbook, halfpage
V
in
V
in
V
in
R2(1)
R2(2)
R2(n)
10 kΩ
C2
CDRW
Fig.3 Simplified schematic.
RFEQO
MGL530
Page 6
Philips Semiconductors Product specification
Data amplifier and laser supply circuit for CD
audio and video optical systems (ADALAS)
Automatic laser power control circuit
The ALPC stabilises the laser output power thereby
reducing the effect of ageing of the laser.
The TZA1024 automatically detects when an
N- or P-substrate monitor diode is used and selects the
correct reference voltage. A simplified diagram for the use
of an N- or P-substrate monitor diode is given in Fig.4.
The gain of the loop can be controlled (reduced) by adding
an external resistor between pins RGADJ and GND.
The loop gain then becomes:
G
loop
G
× G
ALPCGlm
×
con
250
×=
------------------------------------250 R
+
RGADJ
where:
G
is the loop gain
loop
G
is the ALPC transfer (60 A/V)
ALPC
Glm is the laser-to-monitor transfer (V/A)
G
is the extra gain introduced when a DC-to-DC
con
converter is used in the loop; G
= 1 when no
con
DC-to-DC converter is used
250 is a fixed internal resistor value (Ω)
R
is the value of the external resistor (Ω).
RGADJ
The minimum available output current is also reduced
when an external resistor is used. The formula to
determine the minimum available output current is shown
in equation (3).
I
oIo(LASER)(max)
250
×=
------------------------------------250 R
+
RGADJ
where:
The bandwidth of the loop is determined by the external
filter capacitor C
determine the bandwidth is shown in equation (4).
τ
-3dB
(2)
where:
The TZA1024 has a protection circuit to prevent laser
damage that can occur due to a dip of V
occurs the output transistor (see Fig.4) will go into
saturation making it unable to supply the required laser
current. Without the protection circuit the ALPC would still
try to supply the required laser current by charging the filter
capacitor C
would create a large output current during the few
milliseconds it needs to discharge the capacitor to a
normal level. The protection circuit monitors the output
transistor and switches off the ALPC when saturation
occurs by discharging the capacitor. The ALPC will
automatically restart within a few milliseconds after the dip
(3)
has passed.
is output current (mA)
I
o
I
o(LASER)(max)
is the maximum laser output current (mA)
250 is a fixed internal resistor value (Ω)
R
C
G
is the value of the external resistor (Ω).
RGADJ
and the loop gain. The formula to
CFIL
C
=
----------------------------------------- -
is the value of the capacitor (F)
CFIL
is the loop gain.
loop
16 106⋅×
CFIL
G
loop
. After the dip a fully charged capacitor
CFIL
TZA1024
. When a dip
DD(L)
(4)
handbook, full pagewidth
150 mV
V
DD(L)
C
CFIL
DC-TO-DC
CONVERTER
a. N-substrate monitor diode. b. P-substrate monitor diode.
Fig.4 Automatic Laser Power Control (ALPC) loop.
1998 Oct 30 6
VDD − 150 mV
V
DD(L)
C
CFIL
DC-TO-DC
CONVERTER
V
DD
MGR519
Page 7
Philips Semiconductors Product specification
Data amplifier and laser supply circuit for CD
TZA1024
audio and video optical systems (ADALAS)
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT
V
DD
V
DD(L)
V
i(n)
V
o(LASER)
V
i(DIN)
I
i(DIN)
V
i(RFFB)
I
i(RFFB)
V
es
T
amb
Notes
1. The maximum value V
2. The maximum value V
3. Pins DIN and RFFB are current inputs with a limitation on the maximum input current.
4. The maximum peak current must not exceed ten times the absolute average input current with a maximum for the
absolute average input current of 1 mA. Averaging is only allowed over a maximum time interval of 100 ms.
5. Equivalent to discharging a 100 pF capacitor via a 1.5 kΩ series resistor with a rise time of 15 ns.
6. Equivalent to discharging a 200 pF capacitor via a 2.5 µH series inductor.
supply voltage −0.5 +5.5 V
laser supply voltage −0.5 +5.5 V
input voltage on pins 3, 4, 7, 8,
note 1 −0.5 VDD+ 0.5 V
10, 11, 12 and 14
laser output voltage note 2 −0.5 V
DD(L)
+ 0.5 V
central diode input voltage note 3 −0.5 − V
central diode input current note 4 −1+1mA
RF feedback voltage note 3 −0.5 − V
RF feedback current note 4 −1+1mA
electrostatic handling human body model; note 5 −2000 +2000 V
machine model; note 6 −250 +250 V
operating ambient temperature 0 70
+ 0.5 must not exceed 5.5 V.
DD
+ 0.5 must not exceed 5.5 V.
DD(L)
°
C
QUALITY SPECIFICATION
In accordance with
“SNW-FQ-611-E”
.
1998 Oct 30 7
Page 8
Philips Semiconductors Product specification
Data amplifier and laser supply circuit for CD
TZA1024
audio and video optical systems (ADALAS)
CHARACTERISTICS
VDD= 2.4 V; V
CDRW = LOW; EQSEL = open-circuit; C
unless otherwise specified.
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
Supplies
V
DD
V
DDL(L)
I
DD
I
q
RF amplifier
I
i(DIN)
Z
i(DIN)
V
CMFB
V
O(RFEQO)
V
o(RFEQO)
Z
o(RFEQO)
t
d(f)(RF)
G
RF
Z
tr(RF)
THD
RF
DD(L)
− V
o(LASER)
= 0.55 V; I
i(DIN)
CFIL
= 0 mA; I
= 10 nF; R
o(LASER)
RFFB
= 80 mA; V
=10kΩ; pin RGADJ connected to ground; T
=1⁄2VDD; PWRON = HIGH;
CMFB
amb
=25°C;
supply voltage 2.4 − 5.5 V
laser supply voltage 2.4 − 5.5 V
supply current − 3 − mA
quiescent supply
PWRON = LOW −−40 µA
current
central diode input
−70 − +70 µA
current
central diode input
− 100 −Ω
impedance
common mode
0.7
1
⁄2V
DD
VDD− 0.4 V
feedback input voltage
RF amplifier output
DC-level
RF amplifier output
CDRW = LOW V
CDRW = HIGH V
− 0.05 − V
CMFB
− 0.35 − V
CMFB
CMFB
CMFB
+ 0.25 V
+ 0.35 V
0.25 − VDD− 0.25 V
voltage
RF amplifier output
note 1 − 100 −Ω
impedance
RF flatness delay CDRW= LOW or HIGH
f < 1 MHz; n = 1;
−−10 ns
EQSEL = LOW
f < 2 MHz; n = 2;
−−5ns
EQSEL = HIGH
f < 4 MHz; n = 4;
−−2.5 ns
EQSEL = open-circuit
RF path gain boost CDRW = LOW or HIGH;
notes 2 and 3
f = 720 kHz; n = 1;
− 5 − dB
EQSEL = LOW
f = 1440 kHz; n = 2;
− 5 − dB
EQSEL = HIGH
f = 2880 kHz; n = 4;
− 0 − dB
EQSEL = open-circuit
RF transimpedance note 4
CDRW = LOW 9.2 9.8 10.4 kΩ
CDRW = HIGH 35.6 38 40.4 kΩ
RF total harmonic
note 3 −−50 − dB
distortion
1998 Oct 30 8
Page 9
Philips Semiconductors Product specification
Data amplifier and laser supply circuit for CD
TZA1024
audio and video optical systems (ADALAS)
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
PSRR
RF
B
RF
V
n(in-band)(rms)
Laser supply circuit
V
drop
I
o(LASER)(max)
Z
o(LASER)
V
i(mon)
I
i(mon)
t
sw(on)(LASER)
RS
ref
V
clamp
Control inputs
Z
i(pd)
Z
i(pu)
V
IL
RF power supply ripple
0 to 100 kHz − 40 − dB
rejection
RF bandwidth unequalized;
5.7 7 8.6 MHz
CDRW = LOW or HIGH;
EQSEL = open-circuit
in-band noise
(RMS value)
note 3
CDRW = LOW
EQSEL = LOW − 2.7 − mV
EQSEL = open-circuit − 1.2 − mV
EQSEL = HIGH − 2.9 − mV
CDRW = HIGH
EQSEL = LOW − 10.5 − mV
EQSEL = open-circuit − 4 − mV
EQSEL = HIGH − 11 − mV
drop voltage note 5 0.55 − 5.5 V
maximum laser output
V
= 0.55 V; note 6 80 −− mA
drop
current
laser output impedance V
= 0.55 V; note 7
drop
I
o(LASER)
I
o(LASER)
=53mA − 500 −Ω
=20mA − 1200 −Ω
monitor input voltage
N-substrate diode 0.132 0.150 0.168 V
P-substrate diode V
− 0.168 VDD− 0.150 VDD− 0.132 V
DD
monitor input current −200 − +200 nA
laser switch-on time − 3 − ms
reference supply
note 8 −−5%
rejection
ALPC clamp voltage note 9 −−0.5 V
pull-down input
− 200 − kΩ
impedance pin CDRW
pull-up input impedance
− 200 − kΩ
pin PWRON
LOW-level input voltage
pin CDRW −0.2 −
pin PWRON −0.2 −
1
⁄3V
DD
1
⁄3V
DD
V
V
pin EQSEL note 10 −−−V
1998 Oct 30 9
Page 10
Philips Semiconductors Product specification
Data amplifier and laser supply circuit for CD
TZA1024
audio and video optical systems (ADALAS)
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
V
IH
Notes
1. Closed-loop output impedance (10 kΩ between pins RFEQO and RFFB).
RF
a) f
=(G
EQ
2. G
b) fEQ= 1440 kHz for n = 2 times speed (see Fig.6)
c) fEQ= not applicable for n = 4 times speed (see Fig.7).
3. The appropriate external filter (n = 1, 2 or 4) should be used (see Table 1).
4. Values to be used in equation (1).
5. V
drop=VDD(L)
6. An external resistor can be used to reduce the maximum output current (and the gain) of the laser supply;
see equation (4).
7. The output impedance strongly depends on the drop voltage (V
when the drop voltage doubles.
HIGH-level input
voltage
pin CDRW
pin PWRON
2
2
⁄3V
⁄3V
DD
DD
− VDD+ 0.2 V
− VDD+ 0.2 V
pin EQSEL note 10 −−−V
RFEQO
at fEQ) − (G
at f = 1 kHz) where:
RFEQO
= 720 kHz for n = 1 times speed (see Fig.5)
− V
o(LASER)
.
). The output impedance will approximately double
drop
∆V
mon
----------------V
8.
RS
ref
9. When a voltage dip at V
To protect the laser against such peak currents a protection circuit will switch-off the laser current when V
becomes lower than V
=
mon
----------------- ∆ V
DD
-------------- -
V
DD
occurs it could cause peak currents on I
DD(L)
clamp
. When V
drop>Vclamp
the laser will switch-on automatically again.
o(LASER)
coming out of the ALPC output.
drop
10. The pin EQSEL is a three level switch. When this pin is left open-circuit two internal resistors will keep the pin EQSEL
at1⁄2VDD. This is the n = 4 times speed state. The two internal resistors are non-linear (when EQSEL = HIGH or LOW
the input or output current will be limited).
1998 Oct 30 10
Page 11
Philips Semiconductors Product specification
Data amplifier and laser supply circuit for CD
audio and video optical systems (ADALAS)
MGR520
12
handbook, halfpage
G
(dB)
8
4
0
−4
−1
10
(2)
(1)
110
f (MHz)
254
(ns)
252
250
248
246
t
d
handbook, halfpage
12
G
(dB)
8
4
0
−4
−1
10
TZA1024
MGR521
(2)
(1)
110
f (MHz)
132
(ns)
130
128
126
124
t
d
(1) Gain.
(2) Delay.
Fig.5 Equalizer gain and delay for n = 1.
G
(dB)
2
0
−2
−4
−1
10
handbook, halfpage
Definition of delay: t
(1)
(2)
110
d
=
f (MHz)
ϕ
--------- -
360
---------------- f
MGR522
47
(ns)
45
43
41
ϕ
=
d
--------- -
360
---------------- f
(1) Gain.
(2) Delay.
Definition of delay: t
Fig.6 Equalizer gain and delay for n = 2.
Table 1 Recommended values of component per speed
for application diagram of Figs 8 and 9
nC1
t
d
147pF
222pF
410pF
ϕ
=
d
--------- -
360
---------------- f
(1) Gain.
(2) Delay.
Definition of delay: t
Fig.7 Gain and delay for n = 4.
1998 Oct 30 11
Page 12
Philips Semiconductors Product specification
Data amplifier and laser supply circuit for CD
TZA1024
audio and video optical systems (ADALAS)
APPLICATION INFORMATION
The application for the TZA1024 (ADALAS) with the SAA7324 (CD10) using a coupling capacitor of 3.3 nF is shown in
Fig.8.
handbook, full pagewidth
OPU
LD
MON
VCOM
V
DD
V
DD(LASER)
100 nF
10 nF
LD
1
V
DD(L)
2
CFIL
3
MON
GND
PWRON CMFB
DIN
TZA1024
4
(ADALAS)
5
6
7
14
13
12
11
10
9
8
RGADJ
V
DD
EQSEL
CDRW
RFEQO
RFFB
R
RGADJ
10 kΩ
V
DD
(1)
100 nF
3.3 nF
1 kΩ
(4)
(3)
C1
from
microprocessor
HFREF
22
kΩ
ISLICE
100 nF100 nF
(2)
HFIN
SAA7324
LDON
VRIN
(CD10)
(5)
C2
R2 (4×)
D1
D2
D3
D4
S1
S2
LF FILTER
(1) See Equation (3) to calculate the value of this resistor.
(2) Pins EQSEL and CDRW can be controlled by the CD10 or a microprocessor but can also be fixed or switched by any other means.
(3) The 10 kΩ feedback resistor between pins 9 and 10 is a fixed value.
(4) For recommended values per speed see Table 1.
(5) The high-pass filter (AC-coupling) is placed at the input of the preamplifier. The −3 dB point (f = 10 kHz) is at
6 × 220 pF
R2 Ω() C2 F()×
---------------------------------------------
D1
D2
D3
D4
S1
S2
4
Fig.8 Application diagram with SAA7324 (CD10) using a coupling capacitor.
MGR523
1998 Oct 30 12
Page 13
Philips Semiconductors Product specification
Data amplifier and laser supply circuit for CD
TZA1024
audio and video optical systems (ADALAS)
The application for the TZA1024 (ADALAS) with the SAA7324 (CD10) without a coupling capacitor is shown in Fig.9.
A minimum supply voltage (VDD) is required for optimal performance.
handbook, full pagewidth
LD
MON
VCOM
V
DD
V
DD(LASER)
100 nF
10 nF
LD
1
V
DD(L)
2
CFIL
3
MON
GND
PWRON CMFB
DIN
TZA1024
4
(ADALAS)
5
6
7
14
13
12
11
10
9
8
RGADJ
V
DD
EQSEL
CDRW
RFEQO
RFFB
R
RGADJ
10 kΩ
(6)
V
DD
(1)
100 nF
1 kΩ
(4)
(3)
C1
from
microprocessor
HFREF
(2)
HFIN
ISLICE
100 nF100 nF
OPU
(5)
C2
R2 (4×)
D1
D2
D3
D4
S1
S2
LF FILTER
(1) See Equation (3) to calculate the value of this resistor.
(2) Pins EQSEL and CDRW can be controlled by the CD10 or a microprocessor but can also be fixed or switched by any other means.
(3) The 10 kΩ feedback resistor between pins 9 and 10 is a fixed value.
(4) For recommended values per speed see Table 1.
(5) The high-pass filter (AC-coupling) is placed at the input of the preamplifier. The −3 dB point (f = 10 kHz) is at
(6) The minimum supply voltage (VDD) without using a coupling capacitor is 2.8 V.
LDON
6 × 220 pF
R2 Ω() C2 F()×
-------------------------------------------- 4
SAA7324
VRIN
D1
D2
D3
D4
S1
S2
(CD10)
MGR524
Fig.9 Application diagram with SAA7324 (CD10) without coupling capacitor.
1998 Oct 30 13
Page 14
Philips Semiconductors Product specification
Data amplifier and laser supply circuit for CD
audio and video optical systems (ADALAS)
PACKAGE OUTLINE
SO14: plastic small outline package; 14 leads; body width 3.9 mm
D
c
y
Z
14
8
TZA1024
SOT108-1
E
H
E
A
X
v M
A
pin 1 index
1
e
0 2.5 5 mm
DIMENSIONS (inch dimensions are derived from the original mm dimensions)
mm
A
max.
1.75
0.069
A
0.25
0.10
0.010
0.004
1
A2A
1.45
1.25
0.057
0.049
0.25
0.01
b
3
p
0.49
0.25
0.36
0.19
0.019
0.0100
0.014
0.0075
UNIT
inches
Note
1. Plastic or metal protrusions of 0.15 mm maximum per side are not included.
(1)E(1)
cD
8.75
8.55
0.35
0.34
7
w M
b
p
scale
eHELLpQZywv θ
4.0
1.27
3.8
0.16
0.050
0.15
6.2
5.8
0.244
0.228
A
2
1.05
0.041
Q
A
1
detail X
1.0
0.7
0.4
0.6
0.028
0.039
0.024
0.016
(A )
L
p
L
0.25
0.01 0.004
A
3
θ
0.25 0.1
0.01
(1)
0.7
0.3
0.028
0.012
o
8
o
0
OUTLINE
VERSION
SOT108-1
IEC JEDEC EIAJ
076E06S MS-012AB
REFERENCES
1998 Oct 30 14
EUROPEAN
PROJECTION
ISSUE DATE
95-01-23
97-05-22
Page 15
Philips Semiconductors Product specification
Data amplifier and laser supply circuit for CD
audio and video optical systems (ADALAS)
SOLDERING
Introduction
There is no soldering method that is ideal for all IC
packages. Wave soldering is often preferred when
through-hole and surface mounted components are mixed
on one printed-circuit board. However, wave soldering is
not always suitable for surface mounted ICs, or for
printed-circuits with high population densities. In these
situations reflow soldering is often used.
This text gives a very brief insight to a complex technology.
A more in-depth account of soldering ICs can be found in
our
“Data Handbook IC26; Integrated Circuit Packages”
(order code 9398 652 90011).
Reflow soldering
Reflow soldering techniques are suitable for all SO
packages.
Reflow soldering requires solder paste (a suspension of
fine solder particles, flux and binding agent) to be applied
to the printed-circuit board by screen printing, stencilling or
pressure-syringe dispensing before package placement.
Several techniques exist for reflowing; for example,
thermal conduction by heated belt. Dwell times vary
between 50 and 300 seconds depending on heating
method. Typical reflow temperatures range from
215 to 250 °C.
Preheating is necessary to dry the paste and evaporate
the binding agent. Preheating duration: 45 minutes at
45 °C.
Wave soldering
Wave soldering techniques can be used for all SO
packages if the following conditions are observed:
• A double-wave (a turbulent wave with high upward
• The longitudinal axis of the package footprint must be
• The package footprint must incorporate solder thieves at
During placement and before soldering, the package must
be fixed with a droplet of adhesive. The adhesive can be
applied by screen printing, pin transfer or syringe
dispensing. The package can be soldered after the
adhesive is cured.
Maximum permissible solder temperature is 260 °C, and
maximum duration of package immersion in solder is
10 seconds, if cooled to less than 150 °C within
6 seconds. Typical dwell time is 4 seconds at 250 °C.
A mildly-activated flux will eliminate the need for removal
of corrosive residues in most applications.
Repairing soldered joints
Fix the component by first soldering two diagonallyopposite end leads. Use only a low voltage soldering iron
(less than 24 V) applied to the flat part of the lead. Contact
time must be limited to 10 seconds at up to 300 °C. When
using a dedicated tool, all other leads can be soldered in
one operation within 2 to 5 seconds between
270 and 320 °C.
TZA1024
pressure followed by a smooth laminar wave) soldering
technique should be used.
parallel to the solder flow.
the downstream end.
1998 Oct 30 15
Page 16
Philips Semiconductors Product specification
Data amplifier and laser supply circuit for CD
TZA1024
audio and video optical systems (ADALAS)
DEFINITIONS
Data sheet status
Objective specification This data sheet contains target or goal specifications for product development.
Preliminary specification This data sheet contains preliminary data; supplementary data may be published later.
Product specification This data sheet contains final product specifications.
Limiting values
Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or
more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation
of the device at these or at any other conditions above those given in the Characteristics sections of the specification
is not implied. Exposure to limiting values for extended periods may affect device reliability.
Application information
Where application information is given, it is advisory and does not form part of the specification.
LIFE SUPPORT APPLICATIONS
These products are not designed for use in life support appliances, devices, or systems where malfunction of these
products can reasonably be expected to result in personal injury. Philips customers using or selling these products for
use in such applications do so at their own risk and agree to fully indemnify Philips for any damages resulting from such
improper use or sale.
1998 Oct 30 16
Page 17
Philips Semiconductors Product specification
Data amplifier and laser supply circuit for CD
audio and video optical systems (ADALAS)
NOTES
TZA1024
1998 Oct 30 17
Page 18
Philips Semiconductors Product specification
Data amplifier and laser supply circuit for CD
audio and video optical systems (ADALAS)
NOTES
TZA1024
1998 Oct 30 18
Page 19
Philips Semiconductors Product specification
Data amplifier and laser supply circuit for CD
audio and video optical systems (ADALAS)
NOTES
TZA1024
1998 Oct 30 19
Page 20
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© Philips Electronics N.V. 1998 SCA60
All rights are reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner.
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Internet: http://www.semiconductors.philips.com
Printed in The Netherlands 545102/00/01/pp20 Date of release: 1998 Oct 30 Document order number: 9397 75004249
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