參數(shù)資料
型號(hào)： LTC6900CS5#TRM
廠商： Linear Technology
文件頁(yè)數(shù)： 1/12頁(yè)
文件大?。?/td> 0K
描述： IC OSC SILICON 20MHZ TSOT23-5
產(chǎn)品目錄繪圖： TSOT23-5 Series Top
標(biāo)準(zhǔn)包裝： 1
類型： 振蕩器 - 硅
頻率： 1kHz ~ 20MHz
電源電壓： 2.7 V ~ 5.5 V
電流 - 電源： 920µA
工作溫度： -40°C ~ 85°C
封裝/外殼： SOT-23-5 細(xì)型，TSOT-23-5
包裝： 剪切帶 (CT)
供應(yīng)商設(shè)備封裝： TSOT-23-5
安裝類型： 表面貼裝
其它名稱： LTC6900CS5
LTC6900CS5#TRMCT
LTC6900CS5-ND
LTC6900
1
6900fa
TYPICAL APPLICATION
DESCRIPTION
Low Power, 1kHz to 20MHz
Resistor Set SOT-23 Oscillator
The LTC6900 is a precision, low power oscillator that is
easy to use and occupies very little PC board space. The
oscillator frequency is programmed by a single external
resistor (RSET). The LTC6900 has been designed for high
accuracy operation (≤1.5% frequency error) without the
need for external trim components.
The LTC6900 operates with a single 2.7V to 5.5V power
supply and provides a rail-to-rail, 50% duty cycle square
wave output. The CMOS output driver ensures fast rise/fall
times and rail-to-rail switching. The frequency-setting
resistor can vary from 10kΩ to 2MΩ to select a master
oscillator frequency between 100kHz and 20MHz (5V
supply). The three-state DIV input determines whether the
master clock is divided by 1, 10 or 100 before driving the
output, providing three frequency ranges spanning 1kHz
to 20MHz (5V supply). The LTC6900 features a proprietary
feedback loop that linearizes the relationship between RSET
and frequency, eliminating the need for tables to calculate
frequency. The oscillator can be easily programmed using
the simple formula outlined below:
fOSC = 10MHz
20k
N
RSET
,N
=
100,
10,
1,
DIV Pin
= V +
DIV Pin
= Open
DIV Pin
= GND
Clock Generator
FEATURES
APPLICATIONS
n One External Resistor Sets the Frequency
n 1kHz to 20MHz Frequency Range
n 500μA Typical Supply Current, VS = 3V, 3MHz
n Frequency Error ≤1.5% Max, 5kHz to 10MHz
(TA = 25°C)
n Frequency Error ≤ 2% Max, 5kHz to 10MHz
(TA = 0°C to 70°C)
n ±40ppm/°C Temperature Stability
n 0.04%/V Supply Stability
n 50% ±1% Duty Cycle 1kHz to 2MHz
n 50% ± 5% Duty Cycle 2MHz to 10MHz
n Fast Start-Up Time: 50μs to 1.5ms
n 100Ω CMOS Output Driver
n Operates from a Single 2.7V to 5.5V Supply
n Low Prole (1mm) ThinSOT Package
n Portable and Battery-Powered Equipment
n PDAs
n Cell Phones
n Low Cost Precision Oscillator
n Charge Pump Driver
n Switching Power Supply Clock Reference
n Clocking Switched Capacitor Filters
n Fixed Crystal Oscillator Replacement
n Ceramic Oscillator Replacement
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. ThinSOT is a trademark of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
RSET vs Desired Output Frequency
V+
1
2
3
5
1kHz ≤ fOSC ≤ 20MHz
5V
5V, N = 100
10k ≤ RSET ≤ 2M
0.1μF
6900 TA01a
4
GND
LTC6900
SET
OUT
DIV
OPEN, N = 10
N = 1
fOSC = 10MHz
20k
N RSET
()
DESIRED OUTPUT FREQUENCY (Hz)
10
R
SET
(kΩ) 100
1k
100k
1M
10M
6900 TA01b
1
10k
10000
1000
100M
÷100
÷10
÷1
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