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參數(shù)資料
| 型號(hào)： | TDA9829T |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類(lèi)： | 衰減器 |
| 英文描述： | Downconverter For DVB(下變頻器 （DVB應(yīng)用）) |
| 中文描述： | RF/MICROWAVE DOWN CONVERTER |
| 文件頁(yè)數(shù)： | 8/20頁(yè) |
| 文件大?。?/td> | 153K |
| 代理商： | TDA9829T |
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1998 Nov 09
8
Philips Semiconductors
Product specification
Downconverter for DVB
TDA9829T
Notes
1.
2.
Performance may be decreased at V
P
= 4.5 V.
This parameter is not tested during production and is only given as application information for designing the television
receiver.
Mute state also can be achieved by leaving pin 20 open-circuit.
Resonance circuit of VCO: Q
0
> 50; C
ext
, C
int
and L see Table 2.
Temperature coefficient of external LC-circuit is equal to zero.
Response speed valid for an IF input level range of 200
μ
V up to 70 mV.
To match the AFC output signal to different tuning systems a current source output is provided. The test circuit is
given in Fig.4. The AFC steepness can be changed by the resistors at pin 14.
Depending on the ratio
C/C
0
of the LC resonant circuit of VCO (Q
0
>
50; C
0
= C
int
+ C
ext
; see Table 2).
3.
4.
5.
6.
7.
8.
Table 1
Input frequencies, symbol frequencies and VCO frequencies
G
IF
IF slip by automatic gain control
tuner gain current from
20 to 80%
6
8
dB
AFC circuit (pin 14);
see notes 7 and 8 and Fig.4
control steepness
I
14
/
f
IF
for
USA
CR
stps(EU)
control steepness
I
14
/
f
IF
for
Europe
CR
stps(US)
f
IF
= 43.75 MHz
0.7
0.98
1.3
μ
A/kHz
f
IF
= 36.15 MHz
0.45
0.70
0.95
μ
A/kHz
DVB output signal (IF input to DVB output)
V
o(p-p)
output voltage (pin 11)
(peak-to-peak value)
DC output voltage
1 dB bandwidth
3 dB bandwidth
fundamental input signal and
IF harmonics
suppression of in-band
harmonics
power supply ripple rejection at
pin 11
C
L
< 15 pF; R
L
> 5 k
; with
internal AGC
1.8
2.1
2.4
V
V
O(DC)
B
1dB
B
3dB
α
C(DVB)
11
35
2.5
12
17
40
V
MHz
MHz
dB
C
L
< 15 pF; R
L
> 5 k
α
H
V
o
= 2.0 V (p-p)
30
35
dB
PSRR
see Fig.5
26
36
dB
SYMBOL
DESCRIPTION
DVB (Europe)
DVB (USA)
UNIT
f
s
f
IF
f
VCO
Symbol frequency
IF frequency
VCO frequency
6.9
36.15
86.0
5.0
43.75
97.5
MHz
MHz
MHz
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
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