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TEA6850 bảng dữ liệu(PDF) 11 Page - NXP Semiconductors

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Giải thích chi tiết về linh kiện  IF filter / amplifier / demodulator for FM radio receivers
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TEA6850 bảng dữ liệu(HTML) 11 Page - NXP Semiconductors

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July 1994
11
Philips Semiconductors
Preliminary specification
IF filter / amplifier / demodulator for FM
radio receivers
TEA6850
Level amplifier (pin 5; typical curve and adjusting range see Fig.7)
ZO
output impedance
8
10
12
k
TC
temperature coefficient of
3.3
10−3/K
output voltage
V5
output voltage
α = −3 dB for EMF = 200µV; 2.1
2.35
2.6
V
EMF = 100
µV
EMF = 1 mV
2.95
3.3
3.65
V
S
slope of output voltage
100
µV < EMF < 10 mV
950
mV/20
dB
V5
level shift adjustment range
EMF = 0
±0.5
±1.0
±1.5
V
Soft mute (typical curves see Fig.8)
level dependence
EMF
start of mute (
α = −3 dB) for
200
−µV
IF input (RMS value)
EMF
−3 dB adjustment range for IF input
100
300
µV
SM
mute slope at
−15 dB
29
32
35
dB/Dec
VMPX/VMPX0
muting depth
EMF < 5
µV; α = −3 dB for
−35
−32
−29
dB
EMF = 200
µV
I32
charge current
V5 = 4.5 V; V32 = 3.9 V
10
13
17
µA
discharge current
V5 = 4.5 V; V32 = 5.1 V
20
26
34
µA
τ
mute
time constant from unmuted to
0.75
1
1.3
ms
muted
τ
unmute
time constant from muted to
1.5
2
2.6
ms
unmuted
high-pass dependence (see Fig.9)
VMPX/VMPX0
muting depth
−12
−10
−8dB
V1
voltage at pin 1 (RMS value)
f = 60 kHz;
165
185
205
mV
VMPX/VMPX0 = −3 dB
I34
charge current
V34 = 0 V
140
200
260
µA
discharge current
V34 = 5 V
0.7
1
3
µA
∆V4
residual DC offset at MPX output
EMF < 80
µV
−−
60
mV
80
µV < EMF < 2 mV
−−
60
mV
MPX output (pin 4)
RO
output resistance
−−
100
RL
load resistance
V4 ≤ 1 V
3
−−
k
CL
load capacitance
−−
50
pF
V4
clipping DC voltage
1.5
7V
V4
residual signal of 300 kHz and
−−
10
mV
higher harmonics (RMS value)
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT


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