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參數(shù)資料
| 型號： | LTC6905MPS5#TRM |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | PLL合成/DDS/VCOs |
| 英文描述： | PLL FREQUENCY SYNTHESIZER, PDSO5 |
| 封裝： | PLASTIC, SOT-23, 5 PIN |
| 文件頁數(shù)： | 8/12頁 |
| 文件大?。?/td> | 166K |
| 代理商： | LTC6905MPS5#TRM |
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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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC6905-XXX | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Fixed Frequency SOT-23 Oscillator |
| LTC6906 | 制造商: 功能描述: 制造商:undefined 功能描述: |
| LTC6906CS6 | 制造商:Linear Technology 功能描述:MICROPOWER, 10KHZ TO 1MHZRESISTOR SET OSCILLATORIN SOT-23 |
| LTC6906CS6#PBF | 制造商:Linear Technology 功能描述:MICROPOWER, 10KHZ TO 1MHZRESISTOR SET OSCILLATORIN SOT-23 制造商:Linear Technology 功能描述:IC PROG OSC 1MHZ 5.5V TSOT-23-6 制造商:Linear Technology 功能描述:IC, PROG OSC, 1MHZ, 5.5V, TSOT-23-6 制造商:Linear Technology 功能描述:IC, PROG OSC, 1MHZ, 5.5V, TSOT-23-6; Operating Mode:-; Frequency:1MHz; Supply Voltage Min:2.25V; Supply Voltage Max:5.5V; Digital IC Case Style:TSOT-23; No. of Pins:6; Clock External Input:-; Operating Temperature Min:-40C ;RoHS Compliant: Yes |
| LTC6906CS6#TR | 制造商:Linear Technology 功能描述:MICROPOWER, 10KHZ TO 1MHZRESISTOR SET OSCILLATORIN SOT-23 制造商:Linear Technology 功能描述:Silicon Oscillator 6-Pin TSOT-23 T/R |
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