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參數(shù)資料
| 型號： | XR2209CP-F |
| 廠商： | Exar Corporation |
| 文件頁數(shù)： | 16/20頁 |
| 文件大小： | 0K |
| 描述： | IC FUNCTION GENERATOR 8PDIP |
| 標準包裝： | 50 |
| 類型： | VCO（雙路） |
| 頻率： | 10Hz ~ 1MHz |
| 電源電壓： | 4 V ~ 13 V |
| 電流 - 電源： | 5mA |
| 工作溫度： | 0°C ~ 70°C |
| 封裝/外殼： | 8-DIP（0.300"，7.62mm） |
| 包裝： | 管件 |
| 供應(yīng)商設(shè)備封裝： | 8-PDIP |
| 安裝類型： | 通孔 |
| 其它名稱： | 1016-1307-5 |
XR-2209
Rev. 2.02
5
PRECAUTIONS
The following precautions should be observed when
operating the XR-2209 family of integrated circuits:
1.
Pulling excessive current from the timing terminals
will adversely affect the temperature stability of the
circuit.
To
minimize
this
disturbance,
it
is
recommended that the total current drawn from pin 4
be limited to
6mA. In addition, permanent damage
to the device may occur if the total timing current
exceeds 10mA.
2.
Terminals 2, 3, and 4 have very low internal
impedance and should, therefore, be protected from
accidental shorting to ground or the supply voltage.
SYSTEM DESCRIPTION
The XR-2209 functional blocks are shown in the block
diagram given in
Figure 1. They are a voltage controlled
oscillator (VCO), and two buffer amplifiers for triangle and
squarewave outputs.
Figure 2 is a simplified XR-2209
schematic diagram that shows the circuit in greater detail.
The VCO is a modified emitter-coupled current controlled
multivibrator. Its oscillation is inversely proportional to the
value of the timing capacitor connected to pins 2 and 3,
and directly proportional to the total timing current IT. This
current is determined by the resistor that is connected
from the timing terminals (pin 4) to ground.
The triangle output buffer has a low impedance output
(10
W typ.) while the squarewave is an open-collector
type. An external bias input allows the XR-2209 to be
used in either single or split supply applications.
RL
Square Wave
Output
VCC
Triangle Wave
S2
C
VCC
1
mF
I +
TR
4
VEE
6
BIAS
5
TWO
8
SWO
7
C2
3
C1
2
1
XR-2209
S1
R
Output
1
mF
I-
5.1K
Figure 3. Test Circuit for Single Supply Operation
VCC
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