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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
=0to5V −−10 µA
Zero level adjustment
V
16
internal bias voltage − 260 − mV
R
16
input resistance − 19 − kΩ
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
630−MΩ
output voltage ratio for
∆ϕ = ϕ(V
3-7
) −ϕ(V
4-6
) − 90°
V
1
=V
2
= 7.5 V;
R
13-14
=10kΩ; 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
5V
I
12
∆
----------
=
V
13
V
14
---------
V
13
V
14
---------