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Электронный компонент: TDA1581

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DATA SHEET
Preliminary specification
File under Integrated Circuits, IC01
March 1992
INTEGRATED CIRCUITS
TDA1581T
Decoder for traffic warning (VWF)
radio transmissions
March 1992
2
Philips Semiconductors
Preliminary specification
Decoder for traffic warning (VWF) radio
transmissions
TDA1581T
FEATURES
Selective subcarrier amplifier (57 kHz) with gain control
Transmitter identification signal (SK) decoder
Area identification signal (BK) and announcement
identification signal (DK) active filtering
BK and DK decoders (Schmitt trigger with switched
hysteresis)
BK and DK switch-on/switch-off delay circuits
SK and BK control outputs.
GENERAL DESCRIPTION
The TDA1581T decoder is for radio transmissions having
57 kHz amplitude-modulated subcarriers as used in the
german `Verkehrs Warnfunk' (VWF) traffic warning
system.
QUICK REFERENCE DATA
Measured in Fig.3 at V
iSK
= 8 mV; f = 57 kHz amplitude modulated with f
m
= 34.95 Hz and m = 60% for `BK-traffic area
C' signal; or with f
m
= 125 Hz and m = 30% for DK signal
ORDERING INFORMATION
Note
1. SOT163-1; 1996 August 28.
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
V
P
supply voltage range
7.5
8.5
10
V
I
P
supply current
-
6
-
mA
V
iSK
nominal input voltage
f = 57 kHz
-
8
-
mV
Z
i
input impedance
f
57 kHz
100
-
-
k
V
iSK
control level
-
3 dB
-
2.4
-
mV
V
i(p-p)
input voltage peak-to-peak value
2
-
-
V
m
BKon
SK switch-on threshold level
-
42
-
%
m
BK
SK switch hysteresis
-
3.5
-
dB
t
dSKon
SK switch-on delay
-
150
-
ms
t
dSKoff
SK switch-off delay
-
750
-
ms
m
DKon
DK switch-on threshold level
-
13
-
%
m
DK
DK switch hysteresis
-
3.6
-
dB
t
dDKon
DK switch-on delay
-
750
-
ms
t
dDKoff
DK switch-off delay
-
750
-
ms
T
amb
operating ambient temperature range
-
30
-
+80
C
EXTENDED
TYPE NUMBER
PACKAGE
PINS
PIN POSITION
MATERIAL
CODE
TDA1581T
20
SO
plastic
SOT163A
(1)
March 1992
3
Philips Semiconductors
Preliminary specification
Decoder for traffic warning (VWF) radio
transmissions
TDA1581T
Fig.1 Block diagram.
March 1992
4
Philips Semiconductors
Preliminary specification
Decoder for traffic warning (VWF) radio
transmissions
TDA1581T
PINNING
SYMBOL
PIN
DESCRIPTION
n.c.
1
not connected
DK
out
2
DK output current
SK
out
3
SK output current
BK
4
time delay BK
V
5BK
5
filter output BK
V
6BK
6
filter input BK
V
P
7
supply voltage
V
P
/ 2
8
half supply voltage
V
9SK
9
SK detector output
n.c.
10
not connected
n.c.
11
not connected
V
12SK
12
57 kHz band pass filter
V
AGC
13
AGC
I
14
14
prestage biasing current
V
MPX
15
MPX input
V
16DK
16
filter input DK
V
17DK
17
filter output DK
DK
18
time delay DK
I
19
19
reference current for BK, DK detector
GND
20
ground
Fig.2 Pin configuration.
March 1992
5
Philips Semiconductors
Preliminary specification
Decoder for traffic warning (VWF) radio
transmissions
TDA1581T
LIMITING VALUES
In accordance with the Absolute Maximum System (IEC134).
CHARACTERISTICS
V
p
= 8.5 V; T
amb
= +25
C; measured at nominal input signal: V
iSK
= 8 mV, f = 57 kHz amplitude modulated with
f
m
= 34.95 Hz and m = 60% for `BK-traffic area C' signal; or with f
m
= 125 Hz and m = 30% for DK signal.
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
V
P
= V
7-20
supply voltage
pin 7
-
-
15
V
V
2; 3-20
switch output voltage
pins 2 or 3
-
0.5
-
15
V
I
2; 3
switch output current
pins 2 or 3
-
10
-
5
mA
V
15-20
signal input voltage
pin 15
-
0.5
-
V
P
V
I
15
signal input current
pin 15
-
-
-
10
mA
P
tot
total power dissipation
-
-
800
mW
T
stg
storage temperature range
-
55
-
+150
C
T
amb
operating ambient temperature range
-
30
-
+80
C
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
V
P
supply voltage
pin 7
7.5
-
10
V
I
P
supply current
pin 7
-
6
15
mA
SK amplifier/decoder
Z
i
input impedance
f
57 kHz
60
-
-
k
V
i(p-p)
input voltage (peak-to-peak value)
2
-
-
V
V
iSK
input voltage at start of gain control
V
o9BK
=
-
3 dB
-
2.4
(1)
-
mV
G
v9-15
voltage gain
V
9BK
/ V
15SK
-
44
(1)
-
dB
G
v9-15
gain spread
-
-
2
dB
G
v
gain control range
40
-
-
dB
V
o9BK
controlled output voltage
-
440
-
mV
V
o9DK
-
220
-
mV
BK circuit
V
o5BKon
switch-on threshold level
pin 3 high-Z
600
670
750
mV
switch hysteresis
3
3.5
4
dB
V
4-20off
BK switch threshold level for BK-off
(SK-off) (typ. value = 0.21V
8-20
)
pin 3 conducting
0.8
0.88
0.97
V
SK output (pin 3)
I
3
permitted load current
-
-
0.5
mA
V
3-20sat
saturation voltage
I
3
= 1.5 mA
-
-
0.35
V
V
3-20
rejection voltage
I
3
< 5
A
18
-
-
V
V
o5BKon
V
o5BKoff
----------------------
March 1992
6
Philips Semiconductors
Preliminary specification
Decoder for traffic warning (VWF) radio
transmissions
TDA1581T
Note
1. selectable by R
14-8
or Z
12-8
.
DK circuit
V
17DKon
switch-on threshold level
pin 2 high-Z
600
670
750
mV
switch hysteresis
3.1
3.6
4.1
dB
V
18-20off
DK switch threshold level for DK-off
(Schmitt trigger output)
(typ. value = 1
V
BE
)
pin 2 conducting
-
0.6
-
V
DK output (pin 2)
I
2
permitted load current
-
-
0.5
mA
V
2-20sat
saturation voltage
I
2
= 1.5 mA
-
-
0.35
V
V
2-20
rejection voltage
I
2
< 5
A
18
-
-
V
BK and DK filter amplifiers
G
o
open loop gain
f = 100 Hz
84
-
-
dB
G
i
current gain
120
-
-
dB
I
i
input bias current
-
-
50
nA
V
o5-8
output offset voltage
R
5-6
= R
16-17
= 680 k
-
-
50
mV
V
17-8
I
o
available output current
1
-
-
mA
R
o
output resistance
-
2
3.5
k
C
L
permitted load capacitance
-
-
50
pF
Internal reference voltage
V
8-20
output voltage (typ. value = 0.5V
P
)
4.0
4.25
4.5
V
R
8
internal resistance of voltage source
-
-
5
I
8-20
available output current
-
2
-
-
mA
I
20-8
0.6
-
-
mA
I
8sc
output short-circuit current
(typ. value = V
P
/ 1 k
)
-
-
8
-
mA
Reference current source
V
19-20
reference voltage
(typ. value = V
8-20
-
V
BE
)
-
3.6
-
V
R
i19
internal biasing resistor
-
5
-
k
R
19-20
permitted range of external
reference resistor
180
-
270
k
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
V
17DKon
V
17DKoff
----------------------
March 1992
7
Philips Semiconductors
Preliminary specification
Decoder for traffic warning (VWF) radio
transmissions
TDA1581T
APPLICATION INFORMATION (see Fig.3)
Notes to the application information
1. Sequence for measuring switch-on delay times (t
don
)
a) Nominal BK or DK input signal at pin 15: V
i(p-p)
= 8 mV; f = 57 kHz; modulation-on.
b) Pin 4 of the BK detector (pin 18 of the DK detector) is switched to ground to cause a low signal at the SK output
at pin 3 (DK output at pin 2).
c) t
don
commences when the ground connection is removed from pin 4 (pin 18) as the positive-going V
oBK
signal at
pin 5 (V
oDK
signal at pin 17) crosses zero.
t
don
ends when the positive-going edge of the SK output arrives at pin 15 (DK at pin 2).
2. Sequence for measuring switch-off delay times (t
doff
)
a) Nominal operating conditions as in note 1.
b) t
doff
commences when the input is switched off as the negative-going V
oBK
signal at pin 5 (V
oDK
signal at pin 17)
crosses zero.
t
doff
ends when the negative-going edge of the SK output arrives at pin 3 (DK at pin 2).
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
V
iSKon
SK switch-on threshold level
m
BK
= 60 %
-
1.8
-
mV
m
BKon
SK switch-on threshold level
V
iSK
= 8 mV
-
32
-
%
SK switch hysteresis
3.0
3.5
4.0
dB
t
dSKon
SK switch-on delay
note 1
-
95
200
ms
t
dSKoff
SK switch-off delay
note 2
380
500
700
ms
V
iDKon
DK switch-on threshold level
m
DK
= 30 %
-
1.5
-
mV
m
DKon
DK switch-on threshold level
V
iDK
= 8 mV
-
13
-
%
DK switch hysteresis
3.1
3.6
4.1
dB
t
dDKon
DK switch-on delay
note 1
-
750
1000
ms
t
dDKoff
DK switch-off delay
note 2
600
750
1000
ms
m
BKon
m
BKoff
-----------------
m
DKon
m
DKoff
-----------------
March 1992
8
Philips Semiconductors
Preliminary specification
Decoder for traffic warning (VWF) radio
transmissions
TDA1581T
Fig.3 Application diagram.
March 1992
9
Philips Semiconductors
Preliminary specification
Decoder for traffic warning (VWF) radio
transmissions
TDA1581T
Fig.4 BK signal voltage at pin 5 as a function of frequency.
Fig.5 DK signal voltage at pin 17 as a function of frequency: f
0
= 125 Hz; Q
18.
March 1992
10
Philips Semiconductors
Preliminary specification
Decoder for traffic warning (VWF) radio
transmissions
TDA1581T
Fig.6 Control characteristic of the SK amplifier at V
P
= 8.5 V, m
BK
= 60% and Q
L
= 70.
March 1992
11
Philips Semiconductors
Preliminary specification
Decoder for traffic warning (VWF) radio
transmissions
TDA1581T
FILTER INFORMATION
Gain
Amplifier conditions: G
o
>> G
v
and G
o
>> 2
Q
2
Recommended components
GENERAL EQUATION
C1 = C2 = C
C1 = C2 = C
R2 << R1
resonance frequency
r
=
gain at
=
r
-
G
vr
=
quality
Q =
C1, C2
metallized polycarbonate film (MKC) capacitors;
5%
and
R1, R2, R3
metal film (MR) resistors;
2%
or
C1, C2
metallized polyester film (MKT) capacitors;
5%
and
R1, R2, R3
carbon film (CR) resistors;
2%
G
v
p
R1
C1
----------------------
p
2
p
C1
C2
+
R3
C1
C2
-------------------------------------
R1
R2
+
R1
R2
R3
C1
C2
-----------------------------------------------------------------
+
+
-----------------------------------------------------------------------------------------------------------------------------------
p
j
and G
v
V
o
V
i
------
=
=
=
, in which
1
R1
R2
R1
R2
+
----------------------
R3
C1
C2
----------------------------------------------------------------------
1
C
R1
R2
R1
R2
+
----------------------
R3
----------------------------------------------
1
C R2
R3
-------------------------------
C2
C1
C2
+
----------------------
R3
R1
--------
1
2
---
R3
R1
--------
1
2
---
R3
R1
--------
C1
C2
C1
C2
+
----------------------
R3 R1
R2
+
(
)
R1
R2
--------------------------------------
1
2
---
R3 R1
R2
+
(
)
R1
R2
--------------------------------------
1
2
---
R3
R2
--------
March 1992
12
Philips Semiconductors
Preliminary specification
Decoder for traffic warning (VWF) radio
transmissions
TDA1581T
PACKAGE OUTLINE
UNIT
A
max.
A
1
A
2
A
3
b
p
c
D
(1)
E
(1)
(1)
e
H
E
L
L
p
Q
Z
y
w
v
REFERENCES
OUTLINE
VERSION
EUROPEAN
PROJECTION
ISSUE DATE
IEC
JEDEC
EIAJ
mm
inches
2.65
0.30
0.10
2.45
2.25
0.49
0.36
0.32
0.23
13.0
12.6
7.6
7.4
1.27
10.65
10.00
1.1
1.0
0.9
0.4
8
0
o
o
0.25
0.1
DIMENSIONS (inch dimensions are derived from the original mm dimensions)
Note
1. Plastic or metal protrusions of 0.15 mm maximum per side are not included.
1.1
0.4
SOT163-1
92-11-17
95-01-24
10
20
w
M
b
p
detail X
Z
e
11
1
D
y
0.25
075E04
MS-013AC
pin 1 index
0.10
0.012
0.004
0.096
0.089
0.019
0.014
0.013
0.009
0.51
0.49
0.30
0.29
0.050
1.4
0.055
0.42
0.39
0.043
0.039
0.035
0.016
0.01
0.25
0.01
0.004
0.043
0.016
0.01
0
5
10 mm
scale
X
A
A
1
A
2
H
E
L
p
Q
E
c
L
v
M
A
(A )
3
A
SO20: plastic small outline package; 20 leads; body width 7.5 mm
SOT163-1
March 1992
13
Philips Semiconductors
Preliminary specification
Decoder for traffic warning (VWF) radio
transmissions
TDA1581T
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
"IC Package Databook" (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
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.
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 diagonally-
opposite 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.
March 1992
14
Philips Semiconductors
Preliminary specification
Decoder for traffic warning (VWF) radio
transmissions
TDA1581T
DEFINITIONS
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.
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.