Philips TDA1576T - 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
---------