Fm/if amplifier/demodulator circuit tda1576t – Philips TDA1576T User Manual
Page 7
1998 Nov 18
7
Philips Semiconductors
Product specification
FM/IF amplifier/demodulator circuit
TDA1576T
Field strength output; see Fig.4
V
15
output voltage
V
iIF
= 0
0
0.1
0.25
V
V
iIF
= 1 mV (RMS)
1.1
1.5
1.9
V
V
iIF
= 250 mV (RMS)
3.2
3.6
4.1
V
S
control steepness
−
0.85
−
V/dec
R
15
output resistance
−
150
200
Ω
dependence on temperature
−
0.3
−
%/K
I
15
standby operational cut-off current
V
5
≥
3 V; V
15
= 0 to 5 V
−
−
10
µ
A
Zero level adjustment
V
16
internal bias voltage
−
260
−
mV
R
16
input resistance
−
19
−
k
Ω
S
control steepness
V
iIF
= 100 mV;
0.87
1.0
1.2
V/V
Detuning detector
I
12
input bias current
−
20
100
nA
Z
12
input impedance
; see Fig.5
6
30
−
M
Ω
output voltage ratio for
∆ϕ
=
ϕ
(V
3-7
)
− ϕ
(V
4-6
)
−
90
°
V
1
= V
2
= 7.5 V;
R
13-14
= 10 k
Ω
; pins 9
and 12 short-circuit;
see Fig.6
∆ϕ
= 9.2
°
(43 kHz); Q = 20
V
9, 12
= 334 mV
0.45
0.5
0.55
V/V
∆ϕ
= 3.5
°
(16 kHz); Q = 20
V
9, 12
= 138 mV
0.75
0.8
0.85
V/V
∆ϕ
= 14
°
(65 kHz); Q = 20
V
9, 12
= 501 mV
0.335
0.345
0.355
V/V
I
13
maximum output current
V
13
= 6 V; see Fig.7
0.4
0.5
0.6
mA
cut-off current
V
13
= 2.5 V; V
9, 12
= 0
−
−
−
100
nA
Internal audio attenuation; see Fig.8
output voltage ratio
α
= attenuation factor
α
= 1 dB
0.11
0.12
0.13
V/V
α
= 7.2 dB
0.095
0.1
0.105
V/V
α ≥
40 dB
−
0.06
−
V/V
I
13
input current
V
13
≤
0.1 V
−
−
−
225
nA
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
V
∆
T
∆
-------
V
iIF
V
15
∆
T
∆
V
15
×
----------------------
=
A
V
15
∆
V
16
∆
------------
=
Z
12
5 V
I
12
∆
----------
=
V
13
V
14
---------
V
13
V
14
---------