TDA1581T [NXP]
Decoder for traffic warning VWF radio transmissions; 解码器，用于交通警示VWF无线传输
| 型号： | TDA1581T |
| 厂家： | 
NXP |
| 描述： | Decoder for traffic warning VWF radio transmissions |
| 文件： | 总14页 (文件大小：116K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
INTEGRATED CIRCUITS
DATA SHEET
TDA1581T
Decoder for traffic warning (VWF)
radio transmissions
March 1992
Preliminary specification
File under Integrated Circuits, IC01
Philips Semiconductors
Preliminary specification
Decoder for traffic warning (VWF) radio
transmissions
TDA1581T
FEATURES
GENERAL DESCRIPTION
• Selective subcarrier amplifier (57 kHz) with gain control
• Transmitter identification signal (SK) decoder
The TDA1581T decoder is for radio transmissions having
57 kHz amplitude-modulated subcarriers as used in the
german ‘Verkehrs Warnfunk’ (VWF) traffic warning
system.
• 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.
QUICK REFERENCE DATA
Measured in Fig.3 at ViSK = 8 mV; f = 57 kHz amplitude modulated with fm = 34.95 Hz and m = 60% for ‘BK-traffic area
C’ signal; or with fm = 125 Hz and m = 30% for DK signal
SYMBOL
VP
PARAMETER
supply voltage range
CONDITIONS
MIN.
7.5
TYP.
8.5
MAX. UNIT
10
V
IP
supply current
−
6
−
mA
mV
kΩ
mV
V
ViSK
nominal input voltage
input impedance
f = 57 kHz
−
8
−
Zi
f ≤ 57 kHz
−3 dB
100
−
−
−
ViSK
control level
2.4
−
−
Vi(p-p)
mBKon
∆mBK
tdSKon
tdSKoff
mDKon
∆mDK
tdDKon
tdDKoff
Tamb
input voltage peak-to-peak value
SK switch-on threshold level
SK switch hysteresis
SK switch-on delay
2
−
−
42
3.5
150
750
13
3.6
750
750
−
−
%
−
−
dB
ms
ms
%
−
−
SK switch-off delay
−
−
DK switch-on threshold level
DK switch hysteresis
DK switch-on delay
−
−
−
−
dB
ms
ms
°C
−
−
DK switch-off delay
−
−
operating ambient temperature range
−30
+80
ORDERING INFORMATION
PACKAGE
PIN POSITION
SO
EXTENDED
TYPE NUMBER
PINS
MATERIAL
CODE
SOT163A(1)
TDA1581T
20
plastic
Note
1. SOT163-1; 1996 August 28.
March 1992
2
Philips Semiconductors
Preliminary specification
Decoder for traffic warning (VWF) radio
transmissions
TDA1581T
March 1992
3
Philips Semiconductors
Preliminary specification
Decoder for traffic warning (VWF) radio
transmissions
TDA1581T
PINNING
SYMBOL PIN
DESCRIPTION
not connected
n.c.
1
2
3
4
5
6
7
8
9
DKout
SKout
τBK
DK output current
SK output current
time delay BK
V5BK
V6BK
VP
filter output BK
filter input BK
supply voltage
VP / 2
V9SK
n.c.
half supply voltage
SK detector output
10 not connected
11 not connected
n.c.
V12SK
VAGC
I14
12 57 kHz band pass filter
13 AGC
14 prestage biasing current
15 MPX input
VMPX
V16DK
V17DK
τDK
16 filter input DK
17 filter output DK
18 time delay DK
I19
19 reference current for BK, DK detector
20 ground
Fig.2 Pin configuration.
GND
March 1992
4
Philips Semiconductors
Preliminary specification
Decoder for traffic warning (VWF) radio
transmissions
TDA1581T
LIMITING VALUES
In accordance with the Absolute Maximum System (IEC134).
SYMBOL
VP = V7-20
V2; 3-20
I2; 3
V15-20
I15
PARAMETER
supply voltage
CONDITIONS
pin 7
MIN.
TYP.
MAX.
15
UNIT
−
−
−
−
−
−
−
−
−
V
switch output voltage
pins 2 or 3
pins 2 or 3
pin 15
−0.5
−10
−0.5
−
15
V
switch output current
5
mA
V
signal input voltage
VP
signal input current
pin 15
−10
800
+150
+80
mA
mW
°C
°C
Ptot
total power dissipation
storage temperature range
operating ambient temperature range
−
Tstg
−55
−30
Tamb
CHARACTERISTICS
Vp = 8.5 V; Tamb = +25 °C; measured at nominal input signal: ViSK = 8 mV, f = 57 kHz amplitude modulated with
fm = 34.95 Hz and m = 60% for ‘BK-traffic area C’ signal; or with fm = 125 Hz and m = 30% for DK signal.
SYMBOL
PARAMETER
supply voltage
supply current
CONDITIONS
pin 7
MIN.
7.5
TYP.
MAX.
10
UNIT
VP
IP
−
V
pin 7
−
6
15
mA
SK amplifier/decoder
Zi
input impedance
f ≤ 57 kHz
60
2
−
−
−
kΩ
V
Vi(p-p)
ViSK
input voltage (peak-to-peak value)
input voltage at start of gain control
voltage gain
−
Vo9BK = −3 dB
−
2.4(1)
44(1)
−
−
mV
dB
dB
dB
mV
mV
Gv9-15
∆Gv9-15
∆Gv
V9BK / V15SK
−
−
gain spread
−
±2
−
gain control range
40
−
−
Vo9BK
Vo9DK
controlled output voltage
440
220
−
−
−
BK circuit
Vo5BKon
switch-on threshold level
switch hysteresis
pin 3 high-Z
600
3
670
3.5
750
4
mV
dB
Vo5BKon
---------------------
Vo5BKoff
V4-20off
BK switch threshold level for BK-off
pin 3 conducting
0.8
0.88
0.97
V
(SK-off) (typ. value = 0.21V8-20
)
SK output (pin 3)
I3
permitted load current
saturation voltage
−
−
−
−
0.5
0.35
−
mA
V
V3-20sat
V3-20
I3 = 1.5 mA
−
rejection voltage
I3 < 5 µA
18
V
March 1992
5
Philips Semiconductors
Preliminary specification
Decoder for traffic warning (VWF) radio
transmissions
TDA1581T
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
DK circuit
V17DKon
switch-on threshold level
switch hysteresis
pin 2 high-Z
600
670
750
mV
3.1
3.6
4.1
dB
V17DKon
---------------------
V17DKoff
V18-20off
DK switch threshold level for DK-off
(Schmitt trigger output)
pin 2 conducting
−
0.6
−
V
(typ. value = 1 × VBE
)
DK output (pin 2)
I2
permitted load current
saturation voltage
rejection voltage
−
−
−
−
0.5
0.35
−
mA
V
V2-20sat
V2-20
I2 = 1.5 mA
−
I2 < 5 µA
18
V
BK and DK filter amplifiers
Go
Gi
open loop gain
f = 100 Hz
84
120
−
−
−
−
−
−
dB
dB
nA
mV
current gain
−
Ii
input bias current
output offset voltage
±50
±50
Vo5-8
V17-8
Io
R5-6 = R16-17 = 680 kΩ −
available output current
output resistance
±1
−
2
−
−
mA
kΩ
pF
Ro
CL
−
−
3.5
50
permitted load capacitance
Internal reference voltage
V8-20
R8
output voltage (typ. value = 0.5VP)
4.0
−
4.25
−
4.5
5
V
internal resistance of voltage source
available output current
Ω
I8-20
I20-8
I8sc
−2
0.6
−
−
−
mA
mA
mA
−
−
output short-circuit current
−8
−
(typ. value = VP / 1 kΩ)
Reference current source
V19-20
reference voltage
−
3.6
−
V
(typ. value = V8-20 − VBE
)
Ri19
internal biasing resistor
−
5
−
kΩ
kΩ
R19-20
permitted range of external
reference resistor
180
−
270
Note
1. selectable by R14-8 or Z12-8
.
March 1992
6
Philips Semiconductors
Preliminary specification
Decoder for traffic warning (VWF) radio
transmissions
TDA1581T
APPLICATION INFORMATION (see Fig.3)
SYMBOL
ViSKon
PARAMETER
CONDITIONS
mBK = 60 %
MIN.
TYP.
1.8
MAX.
UNIT
mV
SK switch-on threshold level
SK switch-on threshold level
SK switch hysteresis
−
−
−
−
mBKon
ViSK = 8 mV
32
%
3.0
3.5
4.0
dB
mBKon
-----------------
mBKoff
tdSKon
tdSKoff
ViDKon
mDKon
SK switch-on delay
note 1
−
95
200
700
−
ms
ms
mV
%
SK switch-off delay
note 2
380
−
500
1.5
13
DK switch-on threshold level
DK switch-on threshold level
DK switch hysteresis
mDK = 30 %
ViDK = 8 mV
−
−
3.1
3.6
4.1
dB
m DKon
-----------------
mDKoff
tdDKon
tdDKoff
DK switch-on delay
DK switch-off delay
note 1
note 2
−
750
750
1000
1000
ms
ms
600
Notes to the application information
1. Sequence for measuring switch-on delay times (tdon
)
a) Nominal BK or DK input signal at pin 15: Vi(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) tdon commences when the ground connection is removed from pin 4 (pin 18) as the positive-going VoBK signal at
pin 5 (VoDK signal at pin 17) crosses zero.
tdon 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 (tdoff
a) Nominal operating conditions as in note 1.
)
b) tdoff commences when the input is switched off as the negative-going VoBK signal at pin 5 (VoDK signal at pin 17)
crosses zero.
tdoff ends when the negative-going edge of the SK output arrives at pin 3 (DK at pin 2).
March 1992
7
Philips Semiconductors
Preliminary specification
Decoder for traffic warning (VWF) radio
transmissions
TDA1581T
March 1992
8
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: f0 = 125 Hz; Q ≈ 18.
March 1992
9
Philips Semiconductors
Preliminary specification
Decoder for traffic warning (VWF) radio
transmissions
TDA1581T
Fig.6 Control characteristic of the SK amplifier at VP = 8.5 V, mBK = 60% and QL = 70.
March 1992
10
Philips Semiconductors
Preliminary specification
Decoder for traffic warning (VWF) radio
transmissions
TDA1581T
FILTER INFORMATION
Gain
Amplifier conditions: Go >> Gv and Go >> 2 × Q2
p
---------------------
R1 × C1
Vo
, in which
G = –
p = jω and Gv=
-----------------------------------------------------------------------------------------------------------------------------------
------
Vi
v
p 2 + p ×
+
C1 + C2
R1 + R2
------------------------------------ -----------------------------------------------------------------
R3 × C1 × C2 R1 × R2 × R3 × C1 × C2
GENERAL EQUATION
C1 = C2 = C
C1 = C2 = C
R2 << R1
resonance frequency
1
1
1
---------------------------------------------------------------------
---------------------------------------------
------------------------------
C R2 × R3
R1 × R2
R1 × R2
ωr =
× R3 × C1 × C2
C
× R3
----------------------
----------------------
R1 + R2
R1 + R2
gain at ω = ωr
−Gvr =
C2
R3
1
2
R3
R1
1
--
2
R3
× -------
R1
×
×
---------------------- -------
-- -------
C1 + C2 R1
quality
1
2
R3
R2
C1 × C2
C1 + C2
R3 (R1 + R2)
R3 (R1 + R2)
-------------------------------------
R1 × R2
1
--
2
×
-- -------
---------------------- × -------------------------------------
R1 × R2
Q =
Recommended components
C1, C2
and
metallized polycarbonate film (MKC) capacitors; ±5%
metal film (MR) resistors; ±2%
R1, R2, R3
or
C1, C2
and
metallized polyester film (MKT) capacitors; ±5%
carbon film (CR) resistors; ±2%
R1, R2, R3
March 1992
11
Philips Semiconductors
Preliminary specification
Decoder for traffic warning (VWF) radio
transmissions
TDA1581T
PACKAGE OUTLINE
SO20: plastic small outline package; 20 leads; body width 7.5 mm
SOT163-1
D
E
A
X
c
y
H
E
v
M
A
Z
20
11
Q
A
2
A
(A )
3
A
1
pin 1 index
θ
L
p
L
1
10
w
detail X
e
M
b
p
0
5
10 mm
scale
DIMENSIONS (inch dimensions are derived from the original mm dimensions)
A
max.
(1)
(1)
(1)
UNIT
A
A
A
b
c
D
E
e
H
L
L
Q
v
w
y
θ
1
2
3
p
E
p
Z
0.30
0.10
2.45
2.25
0.49
0.36
0.32
0.23
13.0
12.6
7.6
7.4
10.65
10.00
1.1
0.4
1.1
1.0
0.9
0.4
mm
2.65
0.25
0.01
1.27
0.050
1.4
0.25 0.25
0.01
0.1
8o
0o
0.012 0.096
0.004 0.089
0.019 0.013 0.51
0.014 0.009 0.49
0.30
0.29
0.42
0.39
0.043 0.043
0.016 0.039
0.035
0.016
inches 0.10
0.055
0.01 0.004
Note
1. Plastic or metal protrusions of 0.15 mm maximum per side are not included.
REFERENCES
OUTLINE
EUROPEAN
PROJECTION
ISSUE DATE
VERSION
IEC
JEDEC
EIAJ
92-11-17
95-01-24
SOT163-1
075E04
MS-013AC
March 1992
12
Philips Semiconductors
Preliminary specification
Decoder for traffic warning (VWF) radio
transmissions
TDA1581T
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
SOLDERING
Introduction
6 seconds. Typical dwell time is 4 seconds at 250 °C.
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 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.
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.
March 1992
13
Philips Semiconductors
Preliminary specification
Decoder for traffic warning (VWF) radio
transmissions
TDA1581T
DEFINITIONS
Data sheet status
Objective specification
Preliminary specification
Product specification
This data sheet contains target or goal specifications for product development.
This data sheet contains preliminary data; supplementary data may be published later.
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.
March 1992
14
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