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參數(shù)資料
| 型號(hào)： | TA8207K |
| 廠商： | Toshiba Corporation |
| 英文描述： | TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic |
| 中文描述： | 東芝雙極線性集成電路硅單片 |
| 文件頁(yè)數(shù)： | 4/10頁(yè) |
| 文件大?。?/td> | 903K |
| 代理商： | TA8207K |
TA8207K
2002-10-30
4
Application Information And Application Method
1
. Adjustment of voltage gain
The voltage gain G
V
is obtained as follows by R
1
,
R
2
and R
f
in Fig.
1
.
R
R
When R
f
= 0
When R
f
=
1
20
G
V
= 45dB (typ.)
By increasing R
f
, reduction of G
V
is possible. However, since the feedback increase is liable to produce
oscillation, it is recommended to use this at 40dB or over.
2. Thermal shut down circuit
The thermal shut down circuit is built in for the purpose of preventing the destruction of IC due to the
abnormal temperature rise when the heat radiation is insufficient.
The operation temperature is set at radiation fin temperature
1
75°C (typ.).
At this temperature or over the bias is interrupted to prevent the destruction of IC.
3. Input stage
The input circuit of this IC is as shown
in Fig.2.
PNP Tr: Q
1
is provided in the input
circuit so as to make its usage possible
without the input coupling capacitor.
However, at pin(6) and (7), max 60mV
offset voltage is produced.
Application after checking volume slide
noise is recommended.
For cutting the volume slide noise,
insert the input capacitor: C
IN
in series
to interrupt the DC component.
4. Oscillation preventive measures
For oscillation preventive capacitor C
6
and C
7
between the output terminal and GND, it is recommended to
use polyester film capacitor having good characteristics for temperature and for high frequency.
Since the characteristics of the capacitor is liable to be influenced by the temperature, use this capacitor
after the temperature test to check the oscillation allowance.
In addition, as the position of the electrolytic capacitor has remarkable influence on the oscillation, connect
C
1
0
to V
CC
at the nearest possible position from power GND.
At using this application with the voltage gain reduced, oscillation is liable to be produced.
Apply the capacitor after checking enough for its capacity, type and mounting position.
1
2
R
R
R
og
20
V
G
G
V
= 56.5dB (typ.)
(*): As the oscillation allowance varies according to the printed pattern layout, the standard printed board of TOSHIBA
is recommended to be referrend to design it.
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