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參數(shù)資料
| 型號(hào)： | TDA9821 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 接收器 |
| 英文描述： | dual channel TV FM intercarrier sound demodulator(雙頻道TV FM內(nèi)載波音解調(diào)器) |
| 中文描述： | FM, AUDIO DEMODULATOR, PDIP16 |
| 封裝： | 0.300 INCH, PLASTIC, MO-001AE, SOT-38-1, DIP-16 |
| 文件頁(yè)數(shù)： | 8/16頁(yè) |
| 文件大?。?/td> | 121K |
| 代理商： | TDA9821 |
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1996 Nov 20
8
Philips Semiconductors
Product specification
Dual channel TV FM intercarrier
sound demodulator
TDA9821
Notes
1.
The output signal at pin 7 can only be measured when mute is disabled. This is achieved by inserting a resistor of
2.7 k
between pin 15 and ground. In this event the input impedance is 490
.
Improvement of ripple rejection is possible by connecting series RC between pin 11 and pin 14 (15 k
+ 2.2
μ
F;
see Fig.5) for a supply voltage of 4.5 to 5.5 V. The rejection of ripple frequencies up to 3 kHz is improved, but up to
200 kHz is worse; see Fig.3.
2.
Fig.3 Typical improvement.
The curves are typical and valid for ripple frequencies between 50 Hz and 3 kHz.
Conditions: input signal: f = 5.5 MHz, 10 mV (RMS value); ripple on V
P
= 100 mV (RMS value), f
r
= 1 kHz;
ripple rejection measurement: unweighted RMS.
(1) Without RC.
(2) With R = 15 k
and C = 2.2
μ
F.
handbook, full pagewidth
9
VP (V)
30
10
0
4
5
6
7
8
RR
(dB)
20
MHA530
(2)
(1)
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