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參數(shù)資料
| 型號(hào)： | TDA9829T |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 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)： | 2/20頁(yè) |
| 文件大?。?/td> | 153K |
| 代理商： | TDA9829T |
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1998 Nov 09
2
Philips Semiconductors
Product specification
Downconverter for DVB
TDA9829T
FEATURES
5 V supply voltage
Gain controlled IF-amplifier
Mixer for DVB-IF downconversion
VCO for Quadrature Amplitude Modulation (QAM)
carrier recovery
External VCO control
Internal and external AGC
DVB output level adjust via AGC adjust
High level DVB operational output amplifier
Mute switch for DVB output
Tuner AGC with adjustable takeover point (TOP)
AFC detector without extra reference circuit
Stabilizer circuit for ripple rejection and to achieve
constant output signals.
GENERAL DESCRIPTION
The TDA9829T is an integrated circuit for DVB-IF
processing.
QUICK REFERENCE DATA
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.
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.
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
V
P
I
P
V
3-4(rms)
SSB
α
mute
I
12(sink)
supply voltage
supply current
input sensitivity (RMS value)
VCO phase noise
mute attenuation
sink current
note 1
4.5
81
103
1.5
5.0
96
100
107
36
2
5.5
111
150
2.6
V
mA
μ
V
dBc/Hz
dB
mA
1 dB DVB signal at output
f = 100 kHz; free-running
note 2
maximum tuner gain
reduction; see Fig.3
f
IF
= 43.75 MHz;
notes 3 and 4; see Fig.4
C
L
< 15 pF; R
L
> 5 k
; with
internal AGC
C
L
< 15 pF; R
L
> 5 k
CR
stps(US)
control steepness
I
14
/
f
IF
for
USA
output voltage
(peak-to-peak value)
1 dB bandwidth
suppression of in-band harmonics V
o
= 2.0 V (p-p)
power supply ripple rejection at
pin 11
0.7
0.98
1.3
μ
A/kHz
V
11(p-p)
1.8
2.1
2.4
V
B
1dB
α
H
PSRR
11
30
26
12
35
36
MHz
dB
dB
see Fig.5
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