- 您現在的位置：買賣IC網 > PDF目錄376452 > XR-2207D (EXAR CORP) Voltage-Controlled Oscillator PDF資料下載
參數資料
| 型號： | XR-2207D |
| 廠商： | EXAR CORP |
| 元件分類： | XO, clock |
| 英文描述： | Voltage-Controlled Oscillator |
| 中文描述： | VCO, 0.00000001 MHz - 1 MHz |
| 封裝： | 0.300 INCH, SOIC-16 |
| 文件頁數： | 7/24頁 |
| 文件大?。?/td> | 248K |
| 代理商： | XR-2207D |
XR-2207
7
Rev. 2.02
S2
A
8
B
9
GND
10
R1
4
R2
5
R3
6
R4
7
V-
12
BIAS
11
TWO
14
SWO
13
C2
3
C1
2
1
XR-2207
C
V
CC
0.1
μ
F
I+
RL
Square Wave
Output
Output
Triangle Wave
I-
Keying Inputs
Binary
R2
R1
R3 R4
S1
0.1
μ
F
Figure 4. Test Circuit for Split Supply Operation
V+
V
CC
V
EE
OPERATING CONSIDERATIONS
Supply Voltage (Pins 1 and 12)
The XR-2207 is designed to operate over a power supply
range of
4V to
13V for split supplies, or 8V to 26V for
single supplies. Figure 5shows the permissible supply
voltage for operation with unequal split supply voltages.
Figure 6and Figure 7show supply current versus supply
voltage Performance is optimum for
12V single supply operation. At higher supply voltages,
the frequency sweep range is reduced.
6V split supply, or
Ground (Pin 10)
For split supply operation, this pin serves as circuit
ground. For single supply operation, pin 10 should be AC
grounded through a 1
μ
F bypass capacitor. During split
supply operation, a ground current of 2I
T
flows out of this
terminal, where I
T
is the total timing current.
Bias for Single Supply (Pin 11)
For single supply operation, pin 11 should be externally
biased to a potential between V
+
/3 and V
+
/2V (see
Figure 3). The bias current at pin 11 is nominally 5% of the
total oscillation timing current, I
T
.
Bypass Capacitors
The recommended value for bypass capacitors is 1
μ
F
although larger values are required for very low frequency
operation.
Timing Resistors (Pins 4, 5, 6, and 7)
The timing resistors determine the total timing current, I
T
,
available to charge the timing capacitor. Values for timing
resistors can range from 2k
to 2M
; however, for
optimum temperature and power supply stability,
recommended values are 4k
to 200k
(see Figure 8
Figure 9 Figure 10and Figure 11). To avoid parasitic pick
up, timing resistor leads should be kept as short as
possible. For noisy environments, unused or deactivated
timing terminals should be bypassed to ground through
0.1
μ
F capacitors.
Timing Capacitor (Pins 2 and 3)
The oscillator frequency is inversely proportional to the
timing capacitor, C. The minimum capacitance value is
limited by stray capacitances and the maximum value by
physical size and leakage current considerations.
Recommended values range from 100pF to 100
μ
F. The
capacitor should be non-polarized.
相關PDF資料 |
PDF描述 |
|---|---|
| XR-2207M | Voltage-Controlled Oscillator |
| XR-2207ID | Circular Connector; MIL SPEC:MIL-C-26482, Series I, Solder; Body Material:Aluminum; Series:PTB; No. of Contacts:18; Connector Shell Size:14; Connecting Termination:Solder; Circular Shell Style:Thru-Bulkhead Receptacle |
| XR-2208 | OPERATIONAL MULTIPLIER |
| XR-2208P | Analog Multiplier |
| XR-2208CP | Analog Multiplier |
相關代理商/技術參數 |
參數描述 |
|---|---|
| XR-2207ID | 制造商:EXAR 制造商全稱:EXAR 功能描述:Voltage-Controlled Oscillator |
| XR-2207M | 制造商:EXAR 制造商全稱:EXAR 功能描述:Voltage-Controlled Oscillator |
| XR2207MD | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Waveform Generator/Support |
| XR2207MD/883B | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Waveform Generator/Support |
| XR2207N | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Waveform Generator/Support |
發(fā)布緊急采購，3分鐘左右您將得到回復。