TDA8722 데이터 시트보기 (PDF) - Philips Electronics
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TDA8722 Datasheet PDF : 28 Pages
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Philips Semiconductors
I2C-bus programmable modulator for
negative video modulation and FM sound
Product specification
TDA8722
SYMBOL
PARAMETER
S/N audio audio signal-to-noise ratio
faudio
P/S
frequency response of the audio signal
picture-to-sound ratio
∆P/S
picture-to-sound ratio range
Channel characteristics
fRF
RF frequency range
VRF
output level on RFA and RFB
∆VRF
SPO
RFsh
SCsh
difference between the level of
modulated carrier and the level of the
unmodulated carrier
spurious outside channel
RF second harmonic level on
asymmetrical output
sound carrier second harmonic level
SCth
fref
IM
sound carrier third harmonic level
video signal harmonics
reference frequency spurious
chrominance beat
Charge pump output (CP)
I8
output current
V7
output voltage
IOZ
OFF-state leakage current
Amplifier output (AMP)
G
amplifier current gain
V7sat
output saturation voltage
Crystal oscillator characteristics (XTAL)
Z9
oscillator input impedance
CONDITIONS
note 6
note 7
no audio signal;
FM = 5.5 MHz;
C17 = 15 pF
no audio signal;
FM = 5.5 MHz;
0 pF ≤ C17 ≤ 39 pF
MIN.
45
−1
−16
TYP.
50
−
−13
MAX.
−
+1
−10
UNIT
dB
dB
dB
−18 −
−10 dB
using tank circuit of Fig.7 471.25 −
asymmetrical output
77
80
loaded with 75 Ω;
f = 471.25 to 855.25 MHz
measurement is made
0
1
during synchronization
pulse for the modulated
carrier
note 8
−
−62
fRF = 471.25 MHz
fRF = 855.25 MHz
fs = 5.5 MHz;
C17 = 15 pF;
fRF < 700 MHz
fs = 5.5 MHz;
C17 = 15 pF;
fRF > 700 MHz
−
−30
−
−20
−
−65
−
−63
fs = 5.5 MHz; C17 = 15 pF −
−65
note 9
−
−60
fp + 31.25 kHz
−
−65
note 10
−
−65
855.25 MHz
83
dBµV
2
dB
−
dBc
−25 dBc
−15 dBc
−60 dBc
−58 dBc
−60 dBc
−55 dBc
−60 dBc
−60 dBc
−
±100 −
µA
in lock
1.5
−
2.5
V
VCP = 2 V; T0 = 1; T1 = 1; −
−
10
nA
T2 = 1
VCP = 2 V; IAMP = 10 µA −
VCP = 0 V; T0 = 1; T1 = 0; −
T2 = 1
4000 −
140 200 mV
−
−
−500 Ω
1998 Jun 23
11
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