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
SYMBOL
PARAMETER
CONDITIONS
AF outputs (pins 11 and 12)
Vo(rms)
Vo(rms)
Ro
CL
RL
nominal output signal voltage THD ≤ 0.3%;
(RMS value)
54% modulation
clipping voltage level
(RMS value)
THD ≤ 1.5%
VP = 5 V
output resistance
VP = 8 V
load capacitor on output
load resistor on output
(AC-coupled)
B
frequency response
(bandwidth)
fi = 40 to 20000 Hz;
note 2
B−3 dB
THD
frequency response
total harmonic distortion
−3 dB; note 2
note 1
S/N(W) weighted signal-to-noise
ratio
“CCIR468-3”
(quasi-peak)
αcr
αmute
∆VDC
crosstalk attenuation for
DUAL
STEREO
mute attenuation
change of DC level output
voltage between any two
modes of operation
notes 1 and 3
Zs ≤ 1 kΩ
Zs ≤ 1 kΩ
Zs ≤ 1 kΩ; note 1
after switching
PSRR
IO(DC)
power supply ripple rejection fr = 70 Hz; see Fig.6
DC output current
10 MHz crystal oscillator (pin 19)
fr
series resonant frequency of CL = 20 pF
crystal (fundamental mode)
fω
working oscillator frequency over operating
(running in parallel
temperature range
resonance mode)
including ageing and
influence of drive circuit
Rr
equivalent crystal series
even at extremely low
resistance
drive level (<1 pW) over
operating temperature
range with C0 = 6 pF
Rn
crystal series resistance of
unwanted mode
C0
C1
PXTAL
VOSC(p-p)
crystal parallel capacitance
crystal motional capacitance
level of drive in operation
oscillator operating voltage
(peak-to-peak value)
with Rr ≤100 Ω
MIN.
−
1.4
2.4
150
−
10
−0.5
300
−
66
70
40
76
−
50
−
9. 995
9. 988
−
2 × Rr
−
−
−
500
TYP.
0.5
1.6
2.65
250
−
−
−
350
0.2
75
75
45
80
−
65
−
10 .008
10 .008
60
−
6
25
−
550
MAX.
UNIT
−
V
−
V
−
V
350
Ω
1.5
nF
−
kΩ
+0.5
dB
400
kHz
0.3
%
−
dB
−
dB
−
dB
−
dB
±10
mV
−
dB
±20
µA
10. 021
10. 028
MHz
MHz
200
Ω
−
Ω
10
pF
50
fF
5
µW
600
mV
1995 Mar 20
9
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