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參數(shù)資料
| 型號： | TDA4470-MFSY |
| 廠商： | ATMEL CORP |
| 元件分類： | 接收器 |
| 英文描述： | AM/FM, AUDIO/VIDEO DEMODULATOR, PDSO28 |
| 封裝： | ROHS COMPLIANT, SSOP-28 |
| 文件頁數(shù)： | 24/24頁 |
| 文件大?。?/td> | 350K |
| 代理商： | TDA4470-MFSY |
9
4803C–TVVCR–10/05
TDA4470
7.
Electrical Characteristics
V
S = +5V, Tamb = +25°C; reference point pin 4 (9, 16), unless otherwise specified.
Parameters
Test Conditions
Pin
Symbol
Min.
Typ.
Max.
Unit
DC-supply
23
Supply voltage, SO28, SSO28
VS
4.5
5.0
5.5
V
Supply current
IS
85
93
mA
VIF-input
6-7
Input sensitivity (RMS value)
For FPLL locked
VIN
80
120
VRMS
Input impedance
(1)
RIN
1.2
k
Input capacitance
(1)
CIN
2pF
VIF-AGC
8 and 15
IF gain control range
GV
60
65
dB
AGC capacitor
8
CAGC
2.2
F
Black level capacitor
15
CBL
100
nF
Switching voltage: VCR mode
(2)
VSW
4.0
V
Switching current: VCR mode
(2)
ISW
50
A
Tuner-AGC
10 and 11(3)
Available tuner-AGC current
Itun
124
mA
Allowable output voltage
V11
0.3
13.5
V
IF slip - tuner AGC
Current ITUN: 10% to 90%
G
IF
810
dB
IF input signal for minimum
take-over point
RTOP = 10 k (VTOP = 4.5V)
VIN
4mV
IF input signal for maximum
take-over point
RTOP = 0, (VTOP = 0.8V)
VIN
40
mV
Variation of the take-over point
by temperature
T
amb = 55°C
VIF-AGC: GV = 46 dB
V
IN
23
dB
Notes:
1. This parameter is given as an application information and has not been tested during production.
2. In VCR mode, the VIF- and SIF path is switched off.
3. The adjustment of the turn over point (delayed tuner AGC) with the external resistor RTOP or external voltage VTOP is
possible.
4. Resonance circuit of VCO (f
o = 38.9 MHz): CVCO = 8.2 - 10 pF,
Coil LVCO with unloaded Q-factor Qo ≥ 60 for an oscillator voltage ≥ 100 mVRMS at pin 20 - 21
(e.g., TOKO coil 7 KM, 292 XNS - 4051Z).
5. The oscillator drift is related to the picture carrier frequency, given that the external LC circuit is temperature-compensated.
6.
α (1.07) = 20 log (4.43 MHz component/1.07 MHz component); α (1.07) value related to black-white signal
input signal conditions: picture carrier = 0 dB, colour carrier = –6 dB, sound carrier = –24 dB.
7. Without external control at pin 13 the IC automatically operates in mode 1:
negatively modulated video-IF signals and FM/NICAM sound signals.
8. Without a control voltage at pin 19 the falling AFC curve is automatically selected.
9. With an open circuit at pin 14 the L’ switch is not active.
10. Picture carrier PC = 38.9 MHz; sound carrier SC1 = 33.4 MHz, SC2 = 33.16 MHz;
PC/SC
1 =13 dB; PC/SC2 = 20 dB; PC unmodulated (equivalent to synchronous peak level).
11. Sound carrier SC = 32.4 MHz, modulated with f
mod = 1 kHz, m = 54%; VIN =10 mV
12. Without a control voltage at pin 3 the SIF input 1 is automatically selected.
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