參數(shù)資料
型號(hào)： TDA9889TS/V1,512
廠商： NXP SEMICONDUCTORS
元件分類： 消費(fèi)家電
英文描述： SPECIALTY CONSUMER CIRCUIT, PDSO16
封裝： 5.30 MM, PLASTIC, SOT-338-1, SSOP-16
文件頁(yè)數(shù)： 4/22頁(yè)
文件大小： 136K
代理商： TDA9889TS/V1,512
2004 Nov 02
12
Philips Semiconductors
Product specication
DVB selective AGC amplier
TDA9888TS; TDA9889TS
Notes
1. Some parameters can be decreased at VP = 4.5 V.
2. This parameter is not tested during production and is only given as application information.
3. For a higher AC load a resistor application is possible.
4. Measured without input signal but AGC adjusted corresponding to following input level
a) 10 mV (RMS)
b) 0.5 mV (RMS).
5. Calculation of the PLL loop filter by using following formulae, valid under the condition for the damping factor
.
and
with the following parameters
KO = VCO steepness (rad/V) or (2π Hz/V),
KD = phase frequency detector steepness (A/rad),
RLFS = synthesizer loop filter serial resistor (),
CLFS = synthesizer loop filter serial capacitor (F),
BL3dB = loop filter bandwidth at 3 dB amplitude (Hz),
d = damping factor
n = divider factor; see Table 4.
6. The reference input at pin S2 is able to operate as a one-pin crystal oscillator as well as an input terminal with
external reference signal, e.g. from the tuning system.
7. The value of Cx determines the accuracy of the resonance frequency of the crystal and depends on the crystal type.
8. The tolerance of the reference frequency determines the accuracy of the low IF. The tolerance of fosc is given by
and the tolerance of fLIF is given by fLIF = fosc.
Table 1
Standard switch settings for TDA9889TS
S1
S0
fIF(centre)
(MHz)
fosc
(MHz)
CHANNEL
BANDWIDTH
(MHz)
REGION
HIGH
36
31
8
Europe
HIGH
LOW
36
31.5
7
Europe
LOW
HIGH
44
40
6
USA
LOW
36
32
6
Europe
d
1.2
≥
BL
3 dB
–
1
2
π
-------
K
O
n
------- KDRLFS
=
d
1
2
--- RLFS
K
O
n
------- KDCLFS
=
f
osc
f
ref
f
ref
----------- fosc
=
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