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參數(shù)資料
| 型號(hào)： | LTC6905IS5#TRMPBF |
| 廠商： | Linear Technology |
| 文件頁數(shù)： | 8/12頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC OSC SILICON 170MHZ TSOT23-5 |
| 標(biāo)準(zhǔn)包裝： | 500 |
| 類型： | 振蕩器 - 硅 |
| 頻率： | 17MHz ~ 170MHz |
| 電源電壓： | 2.7 V ~ 5.5 V |
| 電流 - 電源： | 14mA |
| 工作溫度： | -40°C ~ 85°C |
| 封裝/外殼： | SOT-23-5 細(xì)型，TSOT-23-5 |
| 包裝： | 帶卷 (TR) |
| 供應(yīng)商設(shè)備封裝： | TSOT-23-5 |
| 安裝類型： | 表面貼裝 |
| 其它名稱： | LTC6905IS5#PBF LTC6905IS5#PBF-ND |
LTC6905
5
6905fd
PIN FUNCTIONS
V+ (Pin 1): Voltage Supply (2.7V ≤ V+ ≤ 5.5V). This sup-
ply must be kept free from noise and ripple. It should be
bypassed directly to the GND (Pin 2) with a 0.1μF capaci-
tor or higher.
GND (Pin 2): Ground. Should be tied to a ground plane
for best performance.
SET (Pin 3): Frequency-Setting Resistor Input. The value
of the resistor connected between this pin and V+ deter-
mines the oscillator frequency. The voltage on this pin is
held by the LTC6905 to approximately 1V below the V+
voltage. For best performance, use a precision metal lm
resistor with a value between 10k and 25k and limit the
capacitance on this pin to less than 10pF.
DIV (Pin 4): Divider-Setting Input. This three-state input
selects among three divider settings, determining the value
of N in the frequency equation. Pin 4 should be tied to V+
for the ÷1 setting, the highest frequency range. Floating
Pin 4 divides the master oscillator by 2. Pin 4 should
be tied to GND for the ÷4 setting, the lowest frequency
range. To detect a oating DIV pin, the LTC6905 attempts
to pull the pin toward midsupply. This is realized with two
internal current sources, one tied to V+ and Pin 4 and the
other one tied to ground and Pin 4. Therefore, driving
the DIV pin high requires sourcing approximately 15μA.
Likewise, driving DIV low requires sinking 11μA. When
Pin 4 is oated, it should be bypassed by a 1nF capacitor
to ground or it should be surrounded by a ground shield
to prevent excessive coupling from other PCB traces.
OUT (Pin 5): Oscillator Output. This pin can drive 5kΩ
and/or 5pF loads. For larger loads, refer to the Applications
Information section.
TYPICAL PERFORMANCE CHARACTERISTICS
ROUT vs V+
Jitter vs Frequency
Frequency vs Temperature
LTC6905 Output Operating at
17.5MHz, VS = 3V
LTC6905 Output Operating at
170MHz, VS = 3V
SUPPLY VOLTAGE (V)
2.5
0
OUTPUT
RESISTANCE
(Ω)
5
15
20
25
4.5
45
6905 G04
10
3.5
3
5
4
5.5
30
35
40
FREQUENCY (MHz)
0
PEAK-TO-PEAK
JITTER
(%)
0.20
0.60
÷4
÷2
÷1
0.80
1.00
40
80 100
180
6905 G05
0.40
20
60
120 140 160
1.20
TEMPERATURE (°C)
–40
–1.0
PERCENTAGE
ERROR
(%)
–0.8
–0.4
–0.2
0
1.0
0.4
0
40
60
6905 G08
–0.6
0.6
0.8
0.2
–20
20
80 100 120
1V/DIV
12.5ns/DIV
6905 G06
1V/DIV
1ns/DIV
6905 G07
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