TDA9845 Philips Semiconductors, TDA9845 Datasheet - Page 11

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

Philips Semiconductors
Notes
1. V
2. Without de-emphasis capacitors with respect to nominal gain.
3. In dual mode: A (B)-signal into B (A) channel.
4. Tuner input signal, measured with PCALH reference front end (
5. Bandwidth of the pilot BP-filter B
6. Identification window is defined as twice the pull-in frequency range (lower plus upper side) of identification PLL
7. The maximum total system identification time ON is equal to t
8. The maximum total system identification time OFF is equal to t
1995 Mar 20
SYMBOL
t
f
t
t
t
LED (pins 14 and 15)
V
V
I
I
Control input ports C1, C2 and C3 (pins 1, 2 and 20)
V
V
I
I
det
ident
integr
ident(on)
ident(off)
L(off)
L(on)
CL
CH
L(off)
L(on)
CL
CH
TV and VTR stereo/dual sound processor
with digital identification
In stereo mode: R-signal into left channel; L-signal = 0.
PC/SC
noise.
(steady detection) plus window increase due to integrator (fluctuating detection).
o
= 0.5 V RMS value; f = 1 kHz.
1
pull-in time of identification
PLL (referenced to
f
f
identification window
frequency width (referenced
to f
and f
integrator time constant
total identification time on
total identification time off
output voltage
output voltage
input current
input current
LOW level input voltage
HIGH level input voltage
LOW level input current
HIGH level input current
= 13 dB; PC/SC
det STEREO
det DUAL
det STEREO
det DUAL
PARAMETER
= 274.12 Hz)
= 117.48 Hz and
= 274.12 Hz)
= 117.48 Hz
2
= 20 dB. The pilot band-pass has to be aligned.
3 dB
= 1.2 kHz. V
STEREO
DUAL
STEREO; note 6
DUAL; note 6
STEREO; note 7
DUAL; note 7
STEREO; note 8
DUAL; note 8
LED off
LED on
LED off
LED on
CONDITIONS
i 2
input driven with identification-modulated pilot carrier and white
11
ident(on)
ident(off)
1
2
EMF, 75 , 2T/20T/white bar, 100% video) and
0
0
2.2
2.3
0.94
0.35
0.35
0.60
0.60
0
2.4
plus t
.
MIN.
acqui AGC
.
TYP.
Preliminary specification
0.8
0.8
2.2
2.3
0.94
2.0
2.0
1.5
1.5
8.8
0.7
1
12
0.8
8.8
1
1
MAX.
TDA9845
s
s
Hz
Hz
s
s
s
s
s
V
V
mA
V
V
A
A
A
UNIT