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Part Number TDA1576

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DATA SHEET
Product specification
Supersedes data of March 1985
File under Integrated Circuits, IC01
1998 Nov 18
INTEGRATED CIRCUITS
TDA1576
FM/IF amplifier/demodulator circuit
1998 Nov 18
2
Philips Semiconductors
Product specification
FM/IF amplifier/demodulator circuit
TDA1576
FEATURES
·
Symmetrical limiting IF amplifier
·
Symmetrical quadrature demodulator
·
Internal muting circuit
·
Symmetrical AFC output
·
Field strength indication output
·
Detune detector
·
Reference voltage output
·
Electronic smoothing of the supply voltage
·
Standby on/off switching circuit.
GENERAL DESCRIPTION
The TDA1576 is a monolithic integrated FM/IF amplifier
circuit for use in mono and stereo FM-receivers of car
radios or home sets.
QUICK REFERENCE DATA
f
o
= 10.7 MHz;
f =
±
22.5 kHz; f
m
= 400 Hz; Q
L
= 20; 50
µ
s de-emphasis.
ORDERING INFORMATION
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
V
P
supply voltage (pin 1)
7.5
-
20
V
I
P
supply current
V
P
= 8.5 V
-
16
-
mA
V
P
= 15 V
-
18
-
mA
V
iIF(rms)
input sensitivity (RMS value)
-
3 dB before limiting
-
22
-
µ
V
= 26 dB
-
8
-
µ
V
= 46 dB
-
35
-
µ
V
V
oAF(rms)
AF output voltage (RMS value)
V
P
= 8.5 V
-
67
-
mV
V
P
= 15 V
-
135
-
mV
THD
total harmonic distortion
single tuned circuit
-
0.1
-
%
two tuned circuits
-
0.02
-
%
signal plus noise-to-noise ratio
V
iIF
> 1 mV (RMS);
V
P
= 8.5 V
-
76
-
dB
V
iIF
> 1 mV (RMS);
V
P
= 15 V
-
80
-
dB
AM
AM suppression
-
50
-
dB
f
i
AFC offset drift
-
±
3
±
6
kHz
V
i
field strength indication
-
90
-
dB
I
L
permissible indicator load current
-
-
2
mA
T
amb
operating ambient temperature
-
30
-
+80
°
C
TYPE
NUMBER
PACKAGE
NAME
DESCRIPTION
VERSION
TDA1576
DIP18
plastic dual in-line package; 18 leads (300 mil)
SOT102-1
S
N
+
N
--------------
S
N
+
N
--------------
S
N
+
N
--------------
1998
Nov
18
3
Philips Semiconductors
Product specification
FM/IF amplifier/demodulator circuit
TDA1576
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BLOCK DIAGRAM
o
k, full pagewidth
MGE456
25 k
25 k
(3.3 k
)
220 k
10 k
3.6 k
15 k
15 k
10
0.1
µ
F
0.1
µ
F
0.1
µ
F
47
µ
F
0.47
µ
F
5.5
k
3.7
k
3.7
k
250
0.1
µ
F
1
nF
G
DETUNE
DETECTOR
I11 =
0.5 mA
L
(2)
750
560
pF
33
pF
33
pF
QUADRATURE
DEMODULATOR
MUTING
4-STAGE
LIMITER/
AMPLIFIER
INTERNAL
POWER
SUPPLY
LEVEL
DETECTOR
INDICATOR
DRIVER
STANDBY
SWITCH
4 V
(6 VBE)
5.3 V
(185 VT)
1.7 V
8.3 k
3
TDA1576
7
6
4
RES1
CPS
VoAF1
VoAF2
Vi(det)
Vo(det)
Vref
VF0
VF
GND
FMON
RES2
IF2
IF1
1
2
8
9
13
14
5
12
11
18
+
(<23 V)
A
(AM)
reference
voltage
zero adjustment
of field strength
indicator
level output
for
field strength
field
strength
indicator
detune
voltage
(25 k
)
FM
on
Z8-10
(240
k
)
Z9-10
(180
k
)
AFC
voltage
C8-9
(1)
VoAF
VP
(15 V)
+
RS
VS
RS
+
-
17
15
VilF
VFB1
VFB2 16
1 mA
20 k
ViIF
10
Fig.1 Block diagram and test circuit.
(1) For 50
µ
s de-emphasis: C
8
-
9
= 6.8 nF; for stereo operation C
8
-
9
= 56 pF.
(2) L = 0.38
µ
H; Q
o
= 70; Q
L
= 20; adjusted to minimum 2
nd
harmonic distortion (d
2
); at V
i
= 1 mV; coil: 6 turns CuL (0.25 mm) on coil former KAN (C).
1998 Nov 18
4
Philips Semiconductors
Product specification
FM/IF amplifier/demodulator circuit
TDA1576
PINNING
SYMBOL
PIN
DESCRIPTION
V
P
1
positive supply voltage
C
PS
2
smoothing capacitor of power supply
IF1
3
IF signal to resonant circuit
RES1
4
resonant circuit input 1
FMON
5
FM-ON, standby switch
RES2
6
resonant circuit input 2
IF2
7
IF signal to resonant circuit
V
oAF1
8
AF output voltage 1 (0
°
phase)
V
oAF2
9
AF output voltage 2 (180
°
phase)
V
i(det)
10
detune detector input voltage for
external audio reference
V
o(det)
11
detune detector output voltage
V
ref
12
reference voltage output
V
F
13
level output for field strength
V
F0
14
zero adjust voltage for field strength
V
iIF
15
FM/IF input signal voltage
V
FB2
16
DC feedback 2
V
FB1
17
DC feedback 1
GND
18
ground (0 V)
Fig.2 Pin configuration.
handbook, halfpage
TDA1576
MBH286
1
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
10
VP
CPS
VoAF1
VoAF2
Vi(det)
Vo(det)
Vref
VF
VF0
VilF
VFB2
VFB1
GND
IF1
RES1
FMON
RES2
IF2
1998 Nov 18
5
Philips Semiconductors
Product specification
FM/IF amplifier/demodulator circuit
TDA1576
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
THERMAL CHARACTERISTICS
SYMBOL
PARAMETER
MIN.
MAX.
UNIT
V
P
supply voltage (pin 1)
0
23
V
V
2
voltage on pin 2
0
V
P
V
V
5, 14
voltage on pins 5 and 14
0
23
V
V
12
voltage on pin 12
0
7
V
V
13
voltage on pin 13
0
6
V
P
tot
total power dissipation
0
800
mW
T
stg
storage temperature
-
55
+150
°
C
T
amb
operating ambient temperature
-
30
+80
°
C
SYMBOL
PARAMETER
VALUE
UNIT
R
th j-a
thermal resistance from junction to ambient in free air
80
K/W
1998 Nov 18
6
Philips Semiconductors
Product specification
FM/IF amplifier/demodulator circuit
TDA1576
CHARACTERISTICS
V
P
= 7.5 to 20 V; f
IF
= 10.7 MHz; R
S
= 60
; f
m
= 400 Hz with
f =
±
22.5 kHz; 50
µ
s de-emphasis (C
8
-
9
= 6.8 nF);
T
amb
= 25
°
C and measurements taken in Fig.1; unless otherwise specified. The demodulator circuit is adjusted at
minimum second harmonic distortion for V
iIF
= 1 mV and a deviation
f =
±
75 kHz.
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
Supply
I
P
supply current without load
I
12
= I
13
= 0; V
P
= 8.5 V
10
16
23
mA
I
12
= I
13
= 0; V
P
= 15 V
12
18
25
mA
IF amplifier/detector
V
iIF(rms)
input sensitivity (RMS value; pin 15)
-
3 dB before limiting
-
22
30
µ
V
= 26 dB
-
8
-
µ
V
= 46 dB
-
35
-
µ
V
V
oIF(p-p)
output voltage at pins 3 and 7
(peak-to-peak value)
Z
3, 7
= 10 pF parallel to
1 M
-
680
-
mV
R
3-7
output resistance
-
250
-
Z
4-6
input impedance
-
30
-
k
C
4-6
input capacitance
-
1
-
pF
R
8, 9
output resistance
-
3.7
-
k
V
8, 9
DC output voltage
V
P
= 8.5 V
-
5.5
-
V
V
P
= 15 V
-
9.8
-
V
V
oAF(rms)
AF output voltage (RMS value)
Q
L
= 20; V
P
= 8.5 V
60
67
75
mV
Q
L
= 20; V
P
= 15 V
120
135
150
mV
THD
total harmonic distortion
single tuned circuit
Q
L
= 20
-
0.1
-
%
two tuned circuits
-
0.02
-
%
signal plus noise-to-noise ratio
(pins 8 and 9)
B = 250 Hz to 15 kHz;
V
i
> 1 mV (RMS); V
P
= 8.5 V
-
76
-
dB
B = 250 Hz to 15 kHz;
V
i
> 1 mV (RMS); V
P
= 15 V
-
80
-
dB
AM
AM suppression
V
iIF
= 10 mV;
FM: 70 Hz;
f =
±
22.5 kHz;
AM: 1 kHz; m = 30%; note 1
-
54
-
dB
V
iIF
IF input voltage
> 40 dB
0.5
-
500
mV
100
hum suppression at f = 100 Hz
V
P
= 100 mV (RMS);
C
2
= 47
µ
F
43
48
-
dB
AFC tuning slope at Q
L
= 20
V
P
= 8.5 V
-
8.5
-
mV/kHz
V
P
= 15 V
-
17
-
mV/kHz
S
N
+
N
--------------
S
N
+
N
--------------
S
N
+
N
--------------
V
8
9
­
f
o
-----------------
1998 Nov 18
7
Philips Semiconductors
Product specification
FM/IF amplifier/demodulator circuit
TDA1576
Note
1. Simultaneously measured.
V
8-9
AFC offset voltages at Q
L
= 20
V
i
= 1 mV; V
P
= 8.5 V
-
-
±
100
mV
V
i
= 1 mV; V
P
= 15 V
-
-
±
200
mV
V
i
= 30
µ
V to 500 mV
(V
ref
= 1 mV and muting);
V
P
= 8.5 V
-
±
25
±
50
mV
V
i
= 30
µ
V to 500 mV
(V
ref
= 1 mV and muting);
V
P
= 15 V
-
±
50
±
100
mV
Field strength output; see Fig.7
V
i
indicator sensitivity
I
14
= 0
0.02
-
600
mV
V
13
output voltage
R
13
= 3.6 k
; I
14
= 0
V
iIF
= 0
-
0
200
mV
V
iIF
= 250 mV (RMS)
3.2
3.6
4.1
V
I
13
available output current
-
2
-
-
mA
V
13
reverse voltage at output for FM off
V
5
> 3.5 V
5
-
-
V
Detuning detector
I
10
quiescent input current
V
10-9
= 0
-
20
100
nA
V
11
output voltage
1.8
-
5.0
V
I
11
maximum output current
0.35
0.5
0.65
mA
G
v
voltage gain
V
11
/
(
±
V
10-9
) at
I
11
= 0.25 mA; V
P
= 15 V
-
3.3
-
V
10-9
input offset voltage (pin 10)
V
11
= 2.5 V
-
20
-
mV
Reference voltage
V
ref
reference voltage (pin 12)
I
12
=
-
1 mA; V
P
= 8.5 V
-
5.1
-
V
I
12
=
-
1 mA; V
P
= 15 V
-
5.3
-
V
I
12
available output current
-
-
2.5
-
mA
Standby switch
V
5
input voltage for FM on
-
-
2
V
input voltage for FM off
3.5
-
-
V
I
5
input current for FM on
-
-
-
100
µ
A
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
1998 Nov 18
8
Philips Semiconductors
Product specification
FM/IF amplifier/demodulator circuit
TDA1576
Fig.3
Supply current consumption as a function of
V
P
without load.
handbook, halfpage
0
20
30
10
0
20
MGE459
10
IP
(mA)
VP (V)
typ
Fig.4
AF output voltage as a function of V
P
;
V
iIF
= 1 mV;
f =
±
15 kHz; f
m
= 400 Hz;
typical values.
handbook, halfpage
0
20
150
50
0
100
MGE460
10
Vo
(mV)
VP (V)
QL = 30
20
10
Fig.5
Total harmonic distortion for single tuned
circuit; V
iIF
= 1 mV; f
m
= 400 Hz; adjusted at
minimum 2
nd
distortion; typical values.
handbook, halfpage
0
±
100
1.5
0.5
0
1
MGE461
±
50
THD
(%)
f (kHz)
QL = 30
20
10
1998 Nov 18
9
Philips Semiconductors
Product specification
FM/IF amplifier/demodulator circuit
TDA1576
Fig.6
AF output voltage level as a function of IF input voltage; V
P
= 15 V; f
m
= 400 Hz; B = 250 Hz to 16 kHz;
Q
L
= 20; C
8
-
9
= 6.8 nF.
handbook, full pagewidth
40
-
40
-
80
1
10
10
2
10
3
10
4
10
5
10
6
MGE462
0
-
20
-
60
20
Vi (
µ
V)
Vo
(dB)
f =
±
75 kHz
±
40 kHz
±
15 kHz
S
+
N
N
Fig.7 Voltage at field strength indicator output (proportional to V
12
); R
13
= 3.6 k
.
handbook, full pagewidth
4
1
0
2
1
10
10
2
10
3
10
4
10
5
10
6
MGE463
3
Vi (
µ
V)
V13
(V)
V 14
= 2 V
V 14
= 1 V
V 14
= 3 V
I14 = 0 V
V14 = 0 V
1998 Nov 18
10
Philips Semiconductors
Product specification
FM/IF amplifier/demodulator circuit
TDA1576
Fig.8
Attenuation of output voltage (
V
o
) as a
function of the muting control voltage V
11
.
handbook, halfpage
0
1.0
20
-
80
-
60
MGE464
-
40
-
20
0
0.2
0.4
0.6
0.8
Vo
(dB)
V11 (V)
Fig.9
FM on/FM off standby switch; attenuation of
output voltage (
V
o
) as a function of control
voltage V
5
.
handbook, halfpage
0
1
2
4
20
-
80
0
MGE465
3
-
20
-
40
-
60
FM on
FM off
Vo
(dB)
V5 (V)
Fig.10 Detuning detector output voltage; V
P
= 7.5 to 20 V; Q
L
= 20.
(1) Limited by external preset (
×
V
12
-
18
).
handbook, full pagewidth
+
300
6
0
-
300
-
100
+
100
-
200
0
+
200
MGE466
4
2
5
3
1
V11
(V)
R8-10 = 0
R9-10 = 180 k
(1)
f (kHz)
R8-10 = 240 k
1998 Nov 18
11
Philips Semiconductors
Product specification
FM/IF amplifier/demodulator circuit
TDA1576
Fig.11 An example of the TDA1576 when using a demodulator with two tuned circuits.
handbook, full pagewidth
MGE457
L1
(1)
(1)
1 k
560
pF
560
pF
L2
390
39 pF
39 pF
33 pF
33 pF
C8-9
VoAF
9
8
7
6
4
3
TDA1576
Adjustment of the demodulator circuit is obtained with an IF signal which is higher than the 3 dB limiting level; L2 should be short-circuited or detuned;
L1 should be adjusted to minimum d
2
distortion, and then L2 to minimum d
2
distortion.
(1) Coil data: L1 = L2 = 0.38
µ
H; Q
o
= 70; coil former KAN (C).
Fig.12 Total harmonic distortion as a function of detuning; f
m
= 400 Hz; C
8
-
9
= 6.8 nF;
f =
±
75 kHz; V
o
= 330 mV
for a frequency deviation
f =
±
75 kHz.
handbook, full pagewidth
+
75
-
75
-
50
+
25
MGE467
+
50
-
25
0
0.1
0.2
0.3
THD
(%)
(fo = 10.7 MHz)
f (kHz)
1998 Nov 18
12
Philips Semiconductors
Product specification
FM/IF amplifier/demodulator circuit
TDA1576
APPLICATION INFORMATION
Fig.13 Application diagram.
(1) For mono C11 = 6.8 nF; for stereo C11 = 56 pF.
handbook, full pagewidth
MGE458
C3
0.1
µ
F
C4
0.1
µ
F
C6
0.1
µ
F
RS
C8
1 nF
R3
3.6 k
R4
10
k
C1
0.1
µ
F
R1
10
C2
47
µ
F
C5
33 pF
C7
560 pF
C9
33 pF
R2
750
L
0.38
µ
H
C11
(1)
C12
R8
3.3 k
R7
3.3 k
R9
180 k
R10
240 k
AFC
voltage
VoAF
FM on
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
TDA1576
detune
voltage
R6
220 k
C10
0.47
µ
F
R5
4.7
k
A
1 mA
VF
FM/IF
input
Vi
(RS)
Vref
+
VP
1998 Nov 18
13
Philips Semiconductors
Product specification
FM/IF amplifier/demodulator circuit
TDA1576
PACKAGE OUTLINE
REFERENCES
OUTLINE
VERSION
EUROPEAN
PROJECTION
ISSUE DATE
IEC
JEDEC
EIAJ
SOT102-1
93-10-14
95-01-23
UNIT
A
max.
1
2
b
1
(1)
(1)
(1)
b
2
c
D
E
e
M
Z
H
L
mm
DIMENSIONS (inch dimensions are derived from the original mm dimensions)
A
min.
A
max.
b
max.
w
M
E
e
1
1.40
1.14
0.53
0.38
0.32
0.23
21.8
21.4
6.48
6.20
3.9
3.4
0.254
2.54
7.62
8.25
7.80
9.5
8.3
0.85
4.7
0.51
3.7
inches
0.055
0.044
0.021
0.015
0.013
0.009
1.40
1.14
0.055
0.044
0.86
0.84
0.26
0.24
0.15
0.13
0.01
0.10
0.30
0.32
0.31
0.37
0.33
0.033
0.19
0.020
0.15
M
H
c
(e )
1
M
E
A
L
seating plane
A
1
w
M
b
1
b
2
e
D
A
2
Z
18
1
10
9
b
E
pin 1 index
0
5
10 mm
scale
Note
1. Plastic or metal protrusions of 0.25 mm maximum per side are not included.
DIP18: plastic dual in-line package; 18 leads (300 mil)
SOT102-1
1998 Nov 18
14
Philips Semiconductors
Product specification
FM/IF amplifier/demodulator circuit
TDA1576
SOLDERING
Introduction to soldering through-hole mount
packages
This text gives a brief insight to wave, dip and manual
soldering. A more in-depth account of soldering ICs can be
found in our
"Data Handbook IC26; Integrated Circuit
Packages" (document order number 9398 652 90011).
Wave soldering is the preferred method for mounting of
through-hole mount IC packages on a printed-circuit
board.
Soldering by dipping or by solder wave
The maximum permissible temperature of the solder is
260
°
C; solder at this temperature must not be in contact
with the joints for more than 5 seconds.
The total contact time of successive solder waves must not
exceed 5 seconds.
The device may be mounted up to the seating plane, but
the temperature of the plastic body must not exceed the
specified maximum storage temperature (T
stg(max)
). If the
printed-circuit board has been pre-heated, forced cooling
may be necessary immediately after soldering to keep the
temperature within the permissible limit.
Manual soldering
Apply the soldering iron (24 V or less) to the lead(s) of the
package, either below the seating plane or not more than
2 mm above it. If the temperature of the soldering iron bit
is less than 300
°
C it may remain in contact for up to
10 seconds. If the bit temperature is between
300 and 400
°
C, contact may be up to 5 seconds.
Suitability of through-hole mount IC packages for dipping and wave soldering methods
Note
1. For SDIP packages, the longitudinal axis must be parallel to the transport direction of the printed-circuit board.
PACKAGE
SOLDERING METHOD
DIPPING
WAVE
DBS, DIP, HDIP, SDIP, SIL
suitable
suitable
(1)
1998 Nov 18
15
Philips Semiconductors
Product specification
FM/IF amplifier/demodulator circuit
TDA1576
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.
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Philips Semiconductors ­ a worldwide company
© Philips Electronics N.V. 1998
SCA60
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Printed in The Netherlands
545102/750/02/pp16
Date of release: 1998 Nov 18
Document order number:
9397 750 04822