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參數(shù)資料
| 型號： | XR2209CP-F |
| 廠商： | Exar Corporation |
| 文件頁數(shù)： | 5/20頁 |
| 文件大小： | 0K |
| 描述： | IC FUNCTION GENERATOR 8PDIP |
| 標(biāo)準(zhǔn)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
13
If R = 2M
W, RC = 2kW, C = 5000pF, then a 1000:1
frequency sweep would result for a negative sweep
voltage VC VEE.
The voltage to frequency conversion gain, K, is controlled
by the series resistance RC and can be expressed as:
K
+ Df
DV
C
+ -
1
RCCV
EE
Hz V
The circuit of
Figure 15 can operate both with positive
and negative values of control voltage. However, for
positive values of VC with small (RC/R) ratio, the direction
of the timing current IT is reversed and the oscillations will
stop.
Frequency Control (Sweep and FM) - Single Supply
The circuit given in
Figure 16 shows the frequency sweep
method for single supply operation. Here, the oscillation
frequency is given as:
f
+ 1
RC
1
) R
R
C
1
–
V
C
V
T
where VT = Vpin4 ~ Vbias + 0.7V.
This equation is valid from VC = 0V where RC is in parallel
with R and IT is maximum to:
V
C + VT
1
)
R
C
R
where IT = 0 and oscillation ceases.
Caution: Total timing current IT must be less than 6mA over the
frequency control range.
VCC
RL
Square Wave
Output
VCC
Triangle Wave
C
VCC
1
mF
4
6
BIAS
5
TWO
8
SWO
7
TC2
3
TC1
2
1
XR-2209
R
RC
VC+
VC
IT
IC
IO
Output
1
mF
VC-
Sweep
or
FM
Voltage
Figure 15. Frequency Sweep Operation, Split Supply
VEE
T4
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