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參數資料
| 型號： | LTC6905 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | 17MHz to 170MHz Resistor Set SOT-23 Oscillator |
| 中文描述： | 17MHz至170MHz電阻設置的SOT - 23振蕩器 |
| 文件頁數： | 8/8頁 |
| 文件大?。?/td> | 119K |
| 代理商： | LTC6905 |
LTC6905
8
6905fa
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com
LINEAR TECHNOLOGY CORPORATION 2005
LT/TP 0205 1K REV A PRINTED IN USA
RELATED PARTS
PART NUMBER
LTC1799
LTC6900
LTC6902
LTC6903/LTC6904
LTC6905-XXX Series
LTC6906
I
2
C is a trademark of Philips Electronics N.V.
DESCRIPTION
1kHz to 33MHz ThinSOT Oscillator
1kHz to 20MHz ThinSOT Oscillator
Multiphase Oscillator with Spread Spectrum Modulation
1kHz to 68MHz Serial Port Programmable Oscillator
Fixed Frequency LTC6905
Micropower, 10kHz to 1MHz Resistor Set ThinSOT Oscillator
COMMENTS
Single Output, High Frequency Operation
Single Output Lower Power
2-, 3- or 4-Phase Outputs
3-Wire or I
2
C
TM
Programmable
High Accuracy, No External Resistor
Ultralow Power, Resistor Sets Frequency
APPLICATIOU
W
U
U
Figure 3. Current Controlled Oscillator
Figure 4. Voltage Controlled Oscillator
f
N
MHz
k
V
V
R
I
V
V
MHz
OSC
SET
SET
CNTRL
SET
=
+
+
+
1
168 5
10
1 5
.
.
–
–
–
I
CNTRL
Frequency
≤
100kHz
Example (Figure 3): V
SET
= (V
+
– 1V), R
SET
= 10k, N = 1
f
MHz
k
I
MHz
OSC
CNTRL
=
(
)
+
[
]
168 5
1 10
–
1 5
.
.
f
N
MHz
k
V
V
R
–
V
V
R
V
V
MHz
OSC
SET
SET
SET
CNTRL
CNTRL
SET
=
+
+
+
1
168 5
10
1 5
.
.
–
–
–
V
CNTRL
Frequency
≤
100kHz
Example (Figure 4): V
SET
= (V
+
– 1V), R
SET
= 10k, R
CNTRL
= 33.2k,
N = 1, V
+
= 3V
f
MHz
k
k
V
V
.
k
MHz
OSC
CNTRL
=
+
168 5
10
1
10
2
33 2
1 5
.
.
–
–
ALTERNATIVE METHODS OF SETTING THE OUTPUT
FREQUENCY OF THE LTC6905
The LTC6905 may be programmed by any method that
sources a current into the SET pin (Pin 3). The accuracy of
the programming is best with a simple resistor because
the LTC6905 takes into account both the voltage at the SET
pin and the current into the SET pin when generating the
output frequency. Since the voltage at the SET pin can vary
by as much as 5%, setting the frequency using a current
rather than a resistor will result in as much as 5% addi-
tional inaccuracy in the output frequency.
Figure 3 shows a method to control the frequency of the
LTC6905 using a current source. R
SET
, in this case, sets a
maximum frequency according to the regular expression
for f
OSC
. The current source will subtract current from the
SET pin to lower the frequency.
Figure 4 shows a method for controlling the frequency of
the LTC6905 using a voltage source. In this case, R
SET
sets
a constant current into the SET pin, and R
CNTRL
will sub-
tract from this current in order to change the frequency.
Increasing V
CNTRL
will increase the output frequency.
V
+
1
2
3
5
f
OSC
69.8MHz TO 170MHz
V
+
0.1
μ
F
R
SET
10k
I
CNTRL
0
μ
μ
A
6905 F03
4
GND
V
+
N = 1
LTC6905
SET
OUT
DIV
V
+
1
2
3
5
V
+
= 3V
0.1
μ
F
R
SET
10k
V
0V TO 2V
6905 F04
4
GND
V
+
N = 1
LTC6905
SET
OUT
DIV
+
R
CNTRL
33.2k
f
69.8MHz TO 170MHz
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LTC6905CS5 | 制造商:Linear Technology 功能描述:Silicon Oscillator 5-Pin TSOT-23 制造商:Linear Technology 功能描述:17MHZ TO 170MHZ RESISTOR SET SOT-23 OSCILLATOR |
| LTC6905CS5#PBF | 制造商:Linear Technology 功能描述:17MHZ TO 170MHZ RESISTOR SET SOT-23 OSCILLATOR 制造商:Linear Technology 功能描述:OSCILLATOR 170MHZ 5.5V SOT- 制造商:Linear Technology 功能描述:OSCILLATOR, 170MHZ, 5.5V, SOT-23-5; Operating Mode:-; Frequency:170MHz; Supply Voltage Min:2.7V; Supply Voltage Max:5.5V; Digital IC Case Style:SOT-23; No. of Pins:5; Clock External Input:Yes; Operating Temperature Min:0C ;RoHS Compliant: Yes |
| LTC6905CS5#TRM | 功能描述:IC OSC SILICON 170MHZ TSOT23-5 RoHS:否 類別:集成電路 (IC) >> 時鐘/計時 - 可編程計時器和振蕩器 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:45 系列:- 類型:溫度 - 補償晶體振蕩器（TCXO） 計數:- 頻率:25MHz 電源電壓:3.135 V ~ 3.465 V 電流 - 電源:1.5mA 工作溫度:-40°C ~ 85°C 封裝/外殼:16-SOIC（0.295"，7.50mm 寬） 包裝:管件 供應商設備封裝:16-SOIC W 安裝類型:表面貼裝 |
| LTC6905CS5#TRMPBF | 功能描述:IC OSC SILICON 170MHZ TSOT23-5 RoHS:是 類別:集成電路 (IC) >> 時鐘/計時 - 可編程計時器和振蕩器 系列:- 標準包裝:3,000 系列:- 類型:振蕩器 - 晶體 計數:- 頻率:- 電源電壓:2.3 V ~ 5.5 V 電流 - 電源:1.07mA 工作溫度:-30°C ~ 80°C 封裝/外殼:SOT-665 包裝:帶卷 (TR) 供應商設備封裝:SS迷你型-5D 安裝類型:表面貼裝 其它名稱:AN8955SSMTXLTR |
| LTC6905CS5#TRPBF | 功能描述:IC OSC SILICON 170MHZ TSOT23-5 RoHS:是 類別:集成電路 (IC) >> 時鐘/計時 - 可編程計時器和振蕩器 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:45 系列:- 類型:溫度 - 補償晶體振蕩器（TCXO） 計數:- 頻率:25MHz 電源電壓:3.135 V ~ 3.465 V 電流 - 電源:1.5mA 工作溫度:-40°C ~ 85°C 封裝/外殼:16-SOIC（0.295"，7.50mm 寬） 包裝:管件 供應商設備封裝:16-SOIC W 安裝類型:表面貼裝 |
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