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Philips Semiconductors
FM/IF amplifier/demodulator circuit
SYMBOL
Field strength output; see Fig.4
V
output voltage
15
S
control steepness
R
output resistance
15
dependence on temperature
V
------ -
T
I
standby operational cut-off current
15
Zero level adjustment
V
internal bias voltage
16
R
input resistance
16
S
control steepness
Detuning detector
I
input bias current
12
Z
input impedance
12
output voltage ratio for
V
13
-------- -
= (V
3-7
V
14
= 9.2 (43 kHz); Q = 20
= 3.5 (16 kHz); Q = 20
= 14 (65 kHz); Q = 20
I
maximum output current
13
cut-off current
Internal audio attenuation; see Fig.8
output voltage ratio
V
13
-------- -
V
14
I
input current
13
1998 Nov 18
PARAMETER
)
(V
)
90
4-6
CONDITIONS
V
= 0
iIF
V
= 1 mV (RMS)
iIF
V
= 250 mV (RMS)
iIF
V
15
V
=
----------------------
iIF
T V
15
V
3 V; V
= 0 to 5 V
5
15
V
= 100 mV;
iIF
V
15
A
=
------------
V
16
5 V
Z
; see Fig.5
=
--------- -
12
I
12
V
= V
= 7.5 V;
1
2
R
= 10 k ; pins 9
13-14
and 12 short-circuit;
see Fig.6
V
= 334 mV
9, 12
V
= 138 mV
9, 12
V
= 501 mV
9, 12
V
= 6 V; see Fig.7
13
V
= 2.5 V; V
= 0
13
9, 12
= attenuation factor
= 1 dB
= 7.2 dB
40 dB
V
0.1 V
13
7
Product specification
TDA1576T
MIN.
TYP.
MAX.
0
0.1
0.25
1.1
1.5
1.9
3.2
3.6
4.1
0.85
150
200
0.3
10
260
19
0.87
1.0
1.2
20
100
6
30
0.45
0.5
0.55
0.75
0.8
0.85
0.335
0.345
0.355
0.4
0.5
0.6
100
0.11
0.12
0.13
0.095
0.1
0.105
0.06
225
UNIT
V
V
V
V/dec
%/K
A
mV
k
V/V
nA
M
V/V
V/V
V/V
mA
nA
V/V
V/V
V/V
nA
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