PHILIPS TZA1024

INTEGRATED CIRCUITS
DATA SHEET
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
Philips Semiconductors
Product specification
Data amplifier and laser supply circuit for CD
audio and video optical systems (ADALAS)
TZA1024
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
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.
• 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
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.
• Optimized interconnection between data amplifier and
Philips’ digital signal processor CD10 (SAA7324)
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.
• Wide supply voltage range
• Power-down switch to reduce power consumption
during standby
• Low power consumption.
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
The TZA1024 is a data amplifier and laser supply circuit for
be optimized to fit the requirements of the laser diode by
voltage output mechanisms found in a wide range of audio
means of one external resistor. When a DC-to-DC
and video CD systems. The device contains an RF
converter is used, in combination with the control loop of
amplifier and an automatic laser power control circuit.
the ALPC, the adjustable output current range provides
the possibility to compensate for the extra gain a DC-to-DC
The preamplifier forms a versatile, programmable
interface for voltage output CD mechanisms to the Philips’ converter introduces in the control loop.
digital signal processor CD10 (SAA7324).
GENERAL DESCRIPTION
1998 Oct 30
2
Philips Semiconductors
Product specification
Data amplifier and laser supply circuit for CD
audio and video optical systems (ADALAS)
TZA1024
QUICK REFERENCE DATA
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
Supplies
VDD
supply voltage
2.4
−
5.5
V
IDD
supply current
−
3
−
mA
VDD(L)
laser supply voltage
2.4
−
5.5
V
EQSEL = LOW; n = 1
−
−
10
ns
EQSEL = HIGH; n = 2
−
−
5
ns
EQSEL = open-circuit;
n = 4; non equalized
−
−
2.5
ns
−
−
mA
RF amplifier
td(f)(RF)
RF flatness delay
Laser supply circuit
Io(LASER)(max) maximum laser output current
Vi(mon)
VDD(L) − Vo(LASER) = 0.55 V 80
monitor input voltage
N-substrate monitor diode
−
0.150
−
V
P-substrate monitor diode
−
VDD − 0.150
−
V
0
−
70
°C
Temperature range
Toper
operating temperature
ORDERING INFORMATION
TYPE
NUMBER
TZA1024T
1998 Oct 30
PACKAGE
NAME
SO14
DESCRIPTION
plastic small outline package; 14 leads; body width 3.9 mm
3
VERSION
SOT108-1
Philips Semiconductors
Product specification
Data amplifier and laser supply circuit for CD
audio and video optical systems (ADALAS)
TZA1024
BLOCK DIAGRAM
VDD
handbook, full pagewidth
13
CDRW
VDD
11
1×
5
4×
12
9
DIN
10
EQSEL
RFFB
RFEQO
2×
8
250
kHz
TZA1024
V/I
MON
1
(1)
4
LD
VGAP
14
V/I
3
VDD
6
7
2
MGR517
GND
VDD(L)
(1) Band gap reference voltage.
Fig.1 Block diagram.
1998 Oct 30
CMFB
4
RGADJ
CFIL
PWRON
Philips Semiconductors
Product specification
Data amplifier and laser supply circuit for CD
audio and video optical systems (ADALAS)
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:
Z tr ( RF )
G RF = – n × -----------------(1)
R2
PINNING
SYMBOL
PIN
DESCRIPTION
LD
1
current output to laser diode
VDD(L)
2
laser supply voltage
CFIL
3
external filter capacitor
TZA1024
MON
4
laser monitor diode input
DIN
5
central diode input
GND
6
ground
GRF is the RF amplifier gain
PWRON
7
power-on select input
n is the number of input resistors
CMFB
8
common mode feedback voltage
input
Ztr(RF) is the transimpedance of the amplifier (Ω)
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)
VDD
13
supply voltage
RGADJ
14
external laser supply gain adjust
resistor
where:
R2 is the value of the input resistors (Ω).
The gain can be increased by a factor 4 by making
pin CDRW HIGH. The value of Ztr(RF) is 9.8 kΩ for CD-A/V
(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.
handbook, halfpage
LD 1
14 RGADJ
VDD(L) 2
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.
13 VDD
CFIL 3
12 EQSEL
MON 4
TZA1024 11 CDRW
DIN 5
10 RFEQO
GND 6
9
RFFB
8 CMFB
PWRON 7
MGR518
Fig.2 Pin configuration.
handbook, halfpage
Vin
Vin
10 kΩ
R2(1)
R2(2)
C2
RFEQO
FUNCTIONAL DESCRIPTION
Vin
The TZA1024 consists of two sections, the RF amplifier
and the automatic laser power control circuit.
R2(n)
CDRW
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
Fig.3 Simplified schematic.
5
MGL530
Philips Semiconductors
Product specification
Data amplifier and laser supply circuit for CD
audio and video optical systems (ADALAS)
TZA1024
where:
Automatic laser power control circuit
Io is output current (mA)
The ALPC stabilises the laser output power thereby
reducing the effect of ageing of the laser.
Io(LASER)(max) is the maximum laser output current (mA)
250 is a fixed internal resistor value (Ω)
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.
RRGADJ is the value of the external resistor (Ω).
The bandwidth of the loop is determined by the external
filter capacitor CCFIL and the loop gain. The formula to
determine the bandwidth is shown in equation (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:
250
G loop = G ALPC × G lm × G con × ------------------------------------(2)
250 + R RGADJ
6
τ -3dB
C CFIL × 16 ⋅ 10
= ----------------------------------------G loop
(4)
where:
where:
CCFIL is the value of the capacitor (F)
Gloop is the loop gain
Gloop is the loop gain.
GALPC is the ALPC transfer (60 A/V)
The TZA1024 has a protection circuit to prevent laser
damage that can occur due to a dip of VDD(L). When a dip
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 CCFIL. After the dip a fully charged capacitor
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
has passed.
Glm is the laser-to-monitor transfer (V/A)
Gcon is the extra gain introduced when a DC-to-DC
converter is used in the loop; Gcon = 1 when no
DC-to-DC converter is used
250 is a fixed internal resistor value (Ω)
RRGADJ is the value of the external resistor (Ω).
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).
250
(3)
I o = I o(LASER)(max) × ------------------------------------250 + R RGADJ
VDD(L)
handbook, full pagewidth
VDD(L)
VDD
VDD − 150 mV
150 mV
DC-TO-DC
CONVERTER
DC-TO-DC
CONVERTER
CCFIL
CCFIL
MGR519
a. N-substrate monitor diode.
b. P-substrate monitor diode.
Fig.4 Automatic Laser Power Control (ALPC) loop.
1998 Oct 30
6
Philips Semiconductors
Product specification
Data amplifier and laser supply circuit for CD
audio and video optical systems (ADALAS)
TZA1024
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
SYMBOL
PARAMETER
CONDITIONS
MIN.
MAX.
UNIT
VDD
supply voltage
−0.5
+5.5
V
VDD(L)
laser supply voltage
−0.5
+5.5
V
Vi(n)
input voltage on pins 3, 4, 7, 8,
10, 11, 12 and 14
note 1
−0.5
VDD + 0.5
V
Vo(LASER)
laser output voltage
note 2
−0.5
VDD(L) + 0.5
V
Vi(DIN)
central diode input voltage
note 3
−0.5
−
V
Ii(DIN)
central diode input current
note 4
−1
+1
mA
Vi(RFFB)
RF feedback voltage
note 3
−0.5
−
V
Ii(RFFB)
RF feedback current
note 4
−1
+1
mA
Ves
electrostatic handling
human body model; note 5 −2000
+2000
V
machine model; note 6
Tamb
operating ambient temperature
−250
0
+250
V
70
°C
Notes
1. The maximum value VDD + 0.5 must not exceed 5.5 V.
2. The maximum value VDD(L) + 0.5 must not exceed 5.5 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.
QUALITY SPECIFICATION
In accordance with “SNW-FQ-611-E”.
1998 Oct 30
7
Philips Semiconductors
Product specification
Data amplifier and laser supply circuit for CD
audio and video optical systems (ADALAS)
TZA1024
CHARACTERISTICS
VDD = 2.4 V; VDD(L) − Vo(LASER) = 0.55 V; Ii(DIN) = 0 mA; Io(LASER) = 80 mA; VCMFB = 1⁄2VDD; PWRON = HIGH;
CDRW = LOW; EQSEL = open-circuit; CCFIL = 10 nF; RRFFB = 10 kΩ; pin RGADJ connected to ground; Tamb = 25 °C;
unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
Supplies
2.4
−
5.5
laser supply voltage
2.4
−
5.5
V
supply current
−
3
−
mA
−
−
40
µA
VDD
supply voltage
VDDL(L)
IDD
Iq
quiescent supply
current
PWRON = LOW
V
RF amplifier
Ii(DIN)
central diode input
current
−70
−
+70
µA
Zi(DIN)
central diode input
impedance
−
100
−
Ω
VCMFB
common mode
feedback input voltage
0.7
1⁄
VDD − 0.4
V
VO(RFEQO)
RF amplifier output
DC-level
CDRW = LOW
VCMFB − 0.05 −
VCMFB + 0.25 V
CDRW = HIGH
VCMFB − 0.35 −
VCMFB + 0.35 V
0.25
−
VDD − 0.25
V
−
100
−
Ω
f < 1 MHz; n = 1;
EQSEL = LOW
−
−
10
ns
f < 2 MHz; n = 2;
EQSEL = HIGH
−
−
5
ns
f < 4 MHz; n = 4;
EQSEL = open-circuit
−
−
2.5
ns
f = 720 kHz; n = 1;
EQSEL = LOW
−
5
−
dB
f = 1440 kHz; n = 2;
EQSEL = HIGH
−
5
−
dB
f = 2880 kHz; n = 4;
EQSEL = open-circuit
−
0
−
dB
Vo(RFEQO)
RF amplifier output
voltage
Zo(RFEQO)
RF amplifier output
impedance
note 1
td(f)(RF)
RF flatness delay
CDRW = LOW or HIGH
GRF
Ztr(RF)
THDRF
1998 Oct 30
RF path gain boost
RF transimpedance
RF total harmonic
distortion
2VDD
CDRW = LOW or HIGH;
notes 2 and 3
note 4
CDRW = LOW
9.2
9.8
10.4
kΩ
CDRW = HIGH
35.6
38
40.4
kΩ
−
−50
−
dB
note 3
8
Philips Semiconductors
Product specification
Data amplifier and laser supply circuit for CD
audio and video optical systems (ADALAS)
SYMBOL
PARAMETER
CONDITIONS
TZA1024
MIN.
TYP.
MAX.
UNIT
PSRRRF
RF power supply ripple
rejection
0 to 100 kHz
−
40
−
dB
BRF
RF bandwidth
unequalized;
CDRW = LOW or HIGH;
EQSEL = open-circuit
5.7
7
8.6
MHz
Vn(in-band)(rms) 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
EQSEL = LOW
−
10.5
−
mV
EQSEL = open-circuit
−
4
−
mV
EQSEL = HIGH
−
11
−
mV
CDRW = HIGH
Laser supply circuit
Vdrop
drop voltage
note 5
0.55
−
5.5
V
Io(LASER)(max)
maximum laser output
current
Vdrop = 0.55 V; note 6
80
−
−
mA
Zo(LASER)
laser output impedance Vdrop = 0.55 V; note 7
Io(LASER) = 53 mA
−
500
−
Ω
Io(LASER) = 20 mA
−
1200
−
Ω
N-substrate diode
0.132
0.150
0.168
V
P-substrate diode
VDD − 0.168
VDD − 0.150 VDD − 0.132
Vi(mon)
monitor input voltage
V
Ii(mon)
monitor input current
−200
−
+200
nA
tsw(on)(LASER)
laser switch-on time
−
3
−
ms
RSref
reference supply
rejection
note 8
−
−
5
%
Vclamp
ALPC clamp voltage
note 9
−
−
0.5
V
Control inputs
Zi(pd)
pull-down input
impedance pin CDRW
−
200
−
kΩ
Zi(pu)
pull-up input impedance
pin PWRON
−
200
−
kΩ
VIL
LOW-level input voltage
−0.2
−
1⁄
3VDD
V
−0.2
−
1⁄
3VDD
V
−
−
−
pin CDRW
pin PWRON
pin EQSEL
1998 Oct 30
note 10
9
V
Philips Semiconductors
Product specification
Data amplifier and laser supply circuit for CD
audio and video optical systems (ADALAS)
SYMBOL
PARAMETER
CONDITIONS
TZA1024
MIN.
TYP.
MAX.
UNIT
HIGH-level input
voltage
VIH
pin CDRW
2⁄
3VDD
−
VDD + 0.2
V
pin PWRON
2⁄
3VDD
−
VDD + 0.2
V
−
−
V
pin EQSEL
−
note 10
Notes
1. Closed-loop output impedance (10 kΩ between pins RFEQO and RFFB).
2. GRF = (GRFEQO at fEQ) − (GRFEQO at f = 1 kHz) where:
a) fEQ = 720 kHz for n = 1 times speed (see Fig.5)
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. Vdrop = VDD(L) − Vo(LASER).
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 (Vdrop). The output impedance will approximately double
when the drop voltage doubles.
8.
RS ref
∆V mon
----------------V mon
= ----------------∆V DD
--------------V DD
9. When a voltage dip at VDD(L) occurs it could cause peak currents on Io(LASER) coming out of the ALPC output.
To protect the laser against such peak currents a protection circuit will switch-off the laser current when Vdrop
becomes lower than Vclamp. When Vdrop > Vclamp the laser will switch-on automatically again.
10. The pin EQSEL is a three level switch. When this pin is left open-circuit two internal resistors will keep the pin EQSEL
at 1⁄2VDD. 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
Philips Semiconductors
Product specification
Data amplifier and laser supply circuit for CD
audio and video optical systems (ADALAS)
MGR520
12
handbook, halfpage
(2)
MGR521
12
254
handbook, halfpage
td
G
(dB)
TZA1024
(2)
(ns)
132
td
(ns)
G
(dB)
(1)
8
8
252
130
(1)
4
250
4
128
0
248
0
126
−4
10−1
(1) Gain.
(2) Delay.
1
Definition of delay:
−4
10−1
246
10
f (MHz)
ϕ 
 -------- 360- 
t d = ----------------f
(1) Gain.
(2) Delay.
Fig.5 Equalizer gain and delay for n = 1.
MGR522
2
handbook, halfpage
G
(dB)
0
47
td
(ns)
1
47 pF
2
22 pF
45
4
10 pF
(1) Gain.
(2) Delay.
43
f (MHz)
41
10
ϕ 
 -------- 360- 
Definition of delay: t d = ----------------f
Fig.7 Gain and delay for n = 4.
1998 Oct 30
Recommended values of component per speed
for application diagram of Figs 8 and 9
C1
(2)
1
ϕ 
 -------- 360- 
t d = ----------------f
n
(1)
−2
Definition of delay:
124
10
f (MHz)
Fig.6 Equalizer gain and delay for n = 2.
Table 1
−4
10−1
1
11
Philips Semiconductors
Product specification
Data amplifier and laser supply circuit for CD
audio and video optical systems (ADALAS)
TZA1024
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.
VDD(LASER)
handbook, full pagewidth
LD
VDD
LD
100 nF
VDD(L)
10 nF
CFIL
MON
MON
VDD
DIN
GND
PWRON
VCOM
1
14
2
13
3
12
4
RRGADJ(1)
100 nF
VDD
EQSEL
TZA1024 11 CDRW
(ADALAS)
5
10
6
9
7
RGADJ
from
microprocessor(2)
8
1 kΩ 3.3 nF
RFEQO
RFFB
CMFB
HFIN
C1(4)
10 kΩ(3)
HFREF
22
kΩ
ISLICE
100 nF
100 nF
SAA7324
OPU
LDON
(CD10)
VRIN
C2(5)
R2 (4×)
D1
D1
D2
D2
D3
D3
D4
D4
S1
S1
S2
S2
LF FILTER
(1)
(2)
(3)
(4)
6 × 220 pF
See Equation (3) to calculate the value of this resistor.
Pins EQSEL and CDRW can be controlled by the CD10 or a microprocessor but can also be fixed or switched by any other means.
The 10 kΩ feedback resistor between pins 9 and 10 is a fixed value.
For recommended values per speed see Table 1.
R2 ( Ω ) × C2 ( F )
(5) The high-pass filter (AC-coupling) is placed at the input of the preamplifier. The −3 dB point (f = 10 kHz) is at --------------------------------------------4
Fig.8 Application diagram with SAA7324 (CD10) using a coupling capacitor.
1998 Oct 30
12
MGR523
Philips Semiconductors
Product specification
Data amplifier and laser supply circuit for CD
audio and video optical systems (ADALAS)
TZA1024
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.
VDD(6)
VDD(LASER)
handbook, full pagewidth
LD
LD
100 nF
VDD(L)
10 nF
CFIL
MON
MON
VDD
DIN
GND
PWRON
VCOM
1
14
2
13
3
12
4
RGADJ
from
microprocessor(2)
RRGADJ(1)
100 nF
VDD
EQSEL
TZA1024 11 CDRW
(ADALAS)
5
10
6
9
8
7
1 kΩ
RFEQO
RFFB
CMFB
HFIN
C1(4)
10 kΩ(3)
HFREF
ISLICE
100 nF
100 nF
SAA7324
OPU
LDON
(CD10)
VRIN
C2(5)
R2 (4×)
D1
D1
D2
D2
D3
D3
D4
D4
S1
S1
S2
S2
LF FILTER
6 × 220 pF
(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.
R2 ( Ω ) × C2 ( F )
(5) The high-pass filter (AC-coupling) is placed at the input of the preamplifier. The −3 dB point (f = 10 kHz) is at --------------------------------------------4
(6) The minimum supply voltage (VDD) without using a coupling capacitor is 2.8 V.
Fig.9 Application diagram with SAA7324 (CD10) without coupling capacitor.
1998 Oct 30
13
MGR524
Philips Semiconductors
Product specification
Data amplifier and laser supply circuit for CD
audio and video optical systems (ADALAS)
TZA1024
PACKAGE OUTLINE
SO14: plastic small outline package; 14 leads; body width 3.9 mm
SOT108-1
D
E
A
X
c
y
HE
v M A
Z
8
14
Q
A2
A
(A 3)
A1
pin 1 index
θ
Lp
1
L
7
e
0
detail X
w M
bp
2.5
5 mm
scale
DIMENSIONS (inch dimensions are derived from the original mm dimensions)
UNIT
A
max.
A1
A2
A3
bp
c
D (1)
E (1)
e
HE
L
Lp
Q
v
w
y
Z (1)
mm
1.75
0.25
0.10
1.45
1.25
0.25
0.49
0.36
0.25
0.19
8.75
8.55
4.0
3.8
1.27
6.2
5.8
1.05
1.0
0.4
0.7
0.6
0.25
0.25
0.1
0.7
0.3
0.010 0.057
0.004 0.049
0.01
0.019 0.0100 0.35
0.014 0.0075 0.34
0.16
0.15
0.050
0.028
0.024
0.01
0.01
0.004
0.028
0.012
inches 0.069
0.244
0.039
0.041
0.228
0.016
θ
Note
1. Plastic or metal protrusions of 0.15 mm maximum per side are not included.
REFERENCES
OUTLINE
VERSION
IEC
JEDEC
SOT108-1
076E06S
MS-012AB
1998 Oct 30
EIAJ
EUROPEAN
PROJECTION
ISSUE DATE
95-01-23
97-05-22
14
o
8
0o
Philips Semiconductors
Product specification
Data amplifier and laser supply circuit for CD
audio and video optical systems (ADALAS)
TZA1024
SOLDERING
Wave soldering
Introduction
Wave soldering techniques can be used for all SO
packages if the following conditions are observed:
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.
• A double-wave (a turbulent wave with high upward
pressure followed by a smooth laminar wave) soldering
technique should be used.
• The longitudinal axis of the package footprint must be
parallel to the solder flow.
• The package footprint must incorporate solder thieves at
the downstream end.
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).
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.
Reflow soldering
Reflow soldering techniques are suitable for all SO
packages.
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.
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.
A mildly-activated flux will eliminate the need for removal
of corrosive residues in most applications.
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.
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.
Preheating is necessary to dry the paste and evaporate
the binding agent. Preheating duration: 45 minutes at
45 °C.
1998 Oct 30
15
Philips Semiconductors
Product specification
Data amplifier and laser supply circuit for CD
audio and video optical systems (ADALAS)
TZA1024
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
Philips Semiconductors
Product specification
Data amplifier and laser supply circuit for CD
audio and video optical systems (ADALAS)
NOTES
1998 Oct 30
17
TZA1024
Philips Semiconductors
Product specification
Data amplifier and laser supply circuit for CD
audio and video optical systems (ADALAS)
NOTES
1998 Oct 30
18
TZA1024
Philips Semiconductors
Product specification
Data amplifier and laser supply circuit for CD
audio and video optical systems (ADALAS)
NOTES
1998 Oct 30
19
TZA1024
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Internet: http://www.semiconductors.philips.com
© 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.
The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed
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under patent- or other industrial or intellectual property rights.
Printed in The Netherlands
545102/00/01/pp20
Date of release: 1998 Oct 30
Document order number:
9397 750 04249