TEA6821T Philips Semiconductors, TEA6821T Datasheet - Page 16

• Manufacturer Part Number: TEA6821T
• Description: ICE car radio
• Manufacturer: Philips Semiconductors

Philips Semiconductors
September 1993
Multipath detector
f
B
Reference voltage
V
I
AM IF path
AM mixer; f
R
C
R
C
I
I
V
IP3
AM oscillator
The AM oscillator signal is generated by division of the 61.5 MHz crystal oscillator.
Two divider ratios programmable via I
AM detector f
V
V
S N/N
THD
V
R
C
R
C
typical AM level curve see Fig.19
Stereo decoder; note 1
Input signal ( f = 75 kHz) V
MP
21
22IF2
22
V
MP
21-4
22-23
48-4
33-34
33-34
= 50 s; nominal input resistor (pin 45) R
ICE car radio
27-24
27-24
22-23
22-23
33-34
24-23
48out
48out
SYMBOL
, I
21-4
23
/V
27-24IF1
IF1
AMIF2
= 10.7 MHz; f
multipath detector band-pass centre
frequency
band-pass bandwidth
output voltage
temperature dependence
output current
input resistance
input capacitance
output resistance
output capacitance
conversion gain
mixer bias current
mixer leakage current
maximum output voltage
(peak-to-peak value)
third order intermodulation
AF output level (RMS value)
sensitivity (RMS value)
signal-plus-noise-to-noise ratio
total harmonic distortion
AM IF
AM IF
IF
IF
output resistance
output capacitance
2
2
= 450 kHz; f
input resistance
input capacitance
2
2
minimum input (RMS value)
maximum input (RMS value)
MPX
PARAMETER
IF2
= 450 kHz; (see Fig.18)
(p-p) = 1.7 V; modulation frequency f
mod
= 400 Hz; m = 30%
2
C-bus: division by 6 (AM IF
i
= 168 k .
I
in FM position
R
300 V
S+N/N = 26 dB
S N/N = 46 dB
m = 0.8;
1 mV
THD
21
L48
16
= 1 mA
> 500 k ;
CONDITIONS
5%; m = 0.8
V
24-23
V
1
33-34
= 10.7 MHz), division by 2 (AM IF
mod
300 mV
= 1 kHz; de-emphasis time constant
300 mV
7.0
4.5
300
10.0
2.2
4.0
12
190
54
800
1.8
27
MIN.
240
1.0
20
5.1
3.3
330
5
20.0
5
2.7
5.0
15
137
150
500
57
2.0
10
33
Preliminary specification
TYP.
TEA6821T
1
5.7
1
360
8
10
3.4
6.0
2
290
250
700
3.0
500
2.2
15
39
10
MAX.
= 30 MHz)
kHz
kHz
V
mV/VK
mA
pF
k
pF
mS
mA
V
dB V
mV
dB
%
mV
k
pF
k
pF
UNIT
A
V
V
V