TDA9845 Philips Semiconductors, TDA9845 Datasheet - Page 10

• Manufacturer Part Number: TDA9845
• Description: TV and VTR stereo/dual sound processor with digital identification
• Manufacturer: Philips Semiconductors

Philips Semiconductors
1995 Mar 20
SYMBOL
Pilot processing
V
R
C
m
t
f
R
V
Q
t
Identification (internal functions)
V
C/N
H
f
pil
LP
acqui AGC
det
f
i pil(rms)
4(rms)
i tuner
TV and VTR stereo/dual sound processor
with digital identification
i pil
i pil
4
L
pil
pilot input voltage level at
pin 6 (RMS value)
pilot input resistance
pilot input capacitance
modulation depth
pilot PLL pull-in frequency
range (referenced to
f
pilot PLL pull-in time
low-pass frequency
response
low-pass output resistance
identification threshold
voltage (RMS value)
loaded quality factor of
resonance circuit
loaded quality factor of
resonance circuit with fixed
coil
AGC acquisition time
identification voltage
sensitivity
pilot carrier-to-noise ratio for
start of identification
hysteresis
pull-in frequency range of
identification PLL
(referenced to
f
f
pil
det STEREO
det DUAL
= 54.6875 kHz)
PARAMETER
= 274.12 Hz)
= 117.48 Hz and
unmodulated
AM
f = 9.988 MHz
f = 10.008 MHz
f = 10.028 MHz
HIGH sensitivity;
see Fig.1
sensitivity loss 2 to 3 dB;
see Fig.2
V
0 to 100 mV RMS value
note 4
note 5
note 4
lower side
upper side
3 dB
i pil(rms)
lower side
upper side
lower side
upper side
lower side
upper side
STEREO
DUAL
STEREO
DUAL
CONDITIONS
switched from
10
5
500
25
192
302
411
0
450
18.75
40
0.63
0.69
405
296
188
0.63
0.69
MIN.
1000
50
600
25
12
28
33
TYP.
Preliminary specification
100
3
75
192
302
411
1.7
750
31.25
70
50
0.1
2
0.63
0.69
405
296
188
0.63
0.69
MAX.
TDA9845
mV
k
pF
%
Hz
Hz
Hz
Hz
Hz
Hz
ms
Hz
k
mV
s
dB V
dB/Hz
dB
Hz
Hz
Hz
Hz
UNIT