TDA9845 查看數據表（PDF） - Philips Electronics
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TDA9845 Datasheet PDF : 20 Pages
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Philips Semiconductors
TV and VTR stereo/dual sound processor
with digital identification
Preliminary specification
TDA9845
FEATURES
• Supply voltage 5 to 8 V
• Source selector
• Stereo matrix
• AF input for mono source
• AF outputs for Main
• LED operation mode indication (stereo and dual)
• High identification reliability.
GENERAL DESCRIPTION
The TDA9845 is a stereo/dual sound processor for TV and
VTR sets. Its identification ensures safe operation by using
internal digital PLL technique with extremely small
bandwidth, synchronous detection and digital integration
(switching time maximum 2.1 s; identification concerning
the main functions).
QUICK REFERENCE DATA
SYMBOL
VP
IP
Vi(rms)
Vo(rms)
Vo(rms)
ILON
Vi pil
S/N(W)
THD
Tamb
fident
tident ON
Vi tuner
∆fpil
PARAMETER
supply voltage (pin 18)
supply current (pin 18)
nominal input signal voltage
(Vi 1, Vi 2, Vi 3) (RMS value)
nominal output signal voltage
(RMS value)
clipping level of the output signal
voltages (RMS value)
input current
input voltage sensitivity of pilot
frequency
weighted signal-to-noise ratio
total harmonic distortion
operating ambient temperature range
identification window width
total identification time ON
identification voltage sensitivity
pull-in frequency range of pilot PLL
CONDITIONS
without LED current
54% modulation
B/G
L (only for Vi 1)
54% modulation
THD ≤1.5%
VP = 5 V
VP = 8 V
LED ON
unmodulated
“CCIR468-3”
STEREO
DUAL
fω = 10.008 MHz
lower side
upper side
MIN. TYP. MAX. UNIT
4.5 5
12 13
8.8 V
16.5 mA
−
250 −
mV
−
500 −
mV
−
500 −
mV
1.4 1.6 −
V
2.4 2.65 −
V
−
−
12 mA
5
−
100 mV
66 75
−
0.2
0
−
2.2 −
2.3 −
0.35 −
−
28
−
dB
0.3 %
+70 °C
2.2 Hz
2.3 Hz
2.1 s
−
dBµV
−296 −
302 −
−296 Hz
302 Hz
ORDERING INFORMATION
TYPE
NUMBER
TDA9845
TDA9845T
NAME
DIP20
SO20
PACKAGE
DESCRIPTION
plastic dual in-line package; 20 leads (300 mil)
plastic small outline package; 20 leads; body width 7.5 mm
VERSION
SOT146-1
SOT163-1
1995 Mar 20
2
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