TEA6821T Просмотр технического описания (PDF) - Philips Electronics
Номер в каталоге
Компоненты Описание
Список матч
TEA6821T Datasheet PDF : 47 Pages
| |||
Philips Semiconductors
ICE car radio
Preliminary specification
TEA6821T
SYMBOL
PARAMETER
CONDITIONS
MIN. TYP. MAX. UNIT
THD
total harmonic distortion
detuning ≤ 50 kHz;
∆f = 75 kHz; fmod = 1 kHz
without de-emphasis
Ldemod = typical value
pin 43
−
V37-35 = 300 µV to 800 mV
pin 47
−
0.1 0.35 %
0.1 0.35 %
V37-35 = 1 mV to 800 mV
∆V43AFCdisabled demodulator frequency control
/∆V43AFCactive (AFC) efficiency at 100 kHz detune
from exact tuning
30
34
−
dB
∆V43
residual DC-offset
∆Ldemod = typical value;
10 µV < V37-35 < 80 µV
−
80 µV < V37-35 < 800 mV −
100 1000 mV
10
30
mV
Unweighted level voltage
BW50
bandwidth
500
Rout50
output resistance
−
V50-4
level unweighted voltage
see Fig.13; V38 = 2.52 V;
V37-35 ≤ 2.5 µV
1.8
V37-35 = 1.0 mV
2.7
V/20 dB
slope of level unweighted voltage
∆V50-4/∆V37-35
V37-35 ≤ 100 µV
(RMS) < 300 mV
0.75
∆V50-4/VK
temperature dependence
V37-35 = 1 mV
−
Adjust of level unweighted voltage and Vmutaml; typical adjusting range see Figs 14 and 17.
∆V50
adjusting range
V37-35 = 1 mV (RMS)
−
∆V50-4 /∆V38-4 adjusting gain
−
R38
input resistance
−
V38-4
internal bias voltage
−
Muting dependence on adjust of level unweighted voltage; typical curve see Fig.15.
−
−
2.4
3.4
0.845
4.0
±2
−0.9
80
2.6
−
100
3.2
4.7
0.95
−
−
−
−
−
kHz
Ω
V
V
V
mV/VK
V
−
kΩ
V
α = V43/V47
∆α /∆V49
start of mute
mute slope
V49/V21 = 0.6
α = −6 dB
−
3
−
−
−
25
−
dB/V
Soft mute, time constant control, mono/stereo blend and high-cut control
Time constant control (see application diagram Fig.3): Slow or fast attack and decay time constants for soft mute,
mono/stereo and high-cut control can be chosen connecting pin 3 to GND or pin 21.
Mute voltage: The static mute voltage follows the level unweighted voltage as function of FM IF2 voltage and level
adjust voltage V38-4. It additionally depends on multipath level, noise (adjacent channel interferences) and the position
of Tswitch. Typical curve for mute voltage dependence on V37-35 see Fig.16.
V49-4
mute voltage
V38 = 2.52 V;
V37-35 ≤ 2.5 µV
1.8 2.2 3.2 V
V37-35 = 1.0 mV
2.7 3.3 4.7 V
September 1993
14
Share Link: 