参数资料
| 型号： | LTC6902IMS#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 7/16页 |
| 文件大小： | 0K |
| 描述： | IC OSC SILICON 20MHZ 10MSOP |
| 标准包装： | 50 |
| 类型： | 振荡器 - 硅 |
| 频率： | 100kHz ~ 20MHz |
| 电源电压： | 2.7 V ~ 5.5 V |
| 电流 - 电源： | 2.5mA |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 包装： | 管件 |
| 供应商设备封装： | 10-MSOP |
| 安装类型： | 表面贴装 |
LTC6902
15
6902f
Figure 7. Start-Up Time
TIME AFTER POWER APPLIED (
s)
0
FREQUENCY
ERROR
(%)
20
30
40
600
400k
1000
69012 F07
10
0
–10
200
400
800
50
60
70
63.2k
20k
TA = 25°C
V+ = 5V
POWER SUPPLY SENSITIVITY
Figure 6 shows the output frequency sensitivity to power
supply voltage at several different temperatures. The
LTC6902 has a guaranteed voltage coefficient of 0.1%/V
but, as Figure 6 shows, the typical supply sensitivity is
twice as low.
START-UP TIME
The start-up time and settling time to within 1% of the final
value can be estimated by tSTART RSET(3.7s/k) +
10
s. Note the start-up time depends on RSET and is
independent from the setting of the divider pin. For in-
stance with RSET = 100k, the LTC6902 will settle with 1%
of its 200kHz final value (N = 10) in approximately 380
s.
Figure 7 shows start-up times for various RSET resistors.
Jitter
The Peak-to-Peak Jitter vs Output Frequency graph, in the
Typical Performance Characteristics section, shows the
typical clock jitter as a function of oscillator frequency and
power supply voltage. The capacitance from the SET pin,
(Pin 3), to ground must be less than 10pF. If this require-
ment is not met, the jitter will increase.
APPLICATIO S I FOR ATIO
WU
UU
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
Figure 6. Supply Sensitivity
SUPPLY VOLTAGE (V)
2.5
–0.05
FREQUENCY
DEVIATION
(%)
0
0.05
0.10
0.15
3.0
3.5
4.0
4.5
69012 F06
5.0
5.5
85
°C
–40
°C
25
°C
RSET = 63.2k
PIN 4 = FLOATING (
÷10)
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