For more information www.linear.com/LTC6990 TYPICAL PERFORMANCE CHARACTERISTICS
參數(shù)資料
型號(hào)： SC-KIT-TBX
廠商： Linear Technology
文件頁(yè)數(shù)： 26/30頁(yè)
文件大小： 0K
描述： TIMERBLOX SAMPLE KIT
設(shè)計(jì)資源： TimerBlox Designer
特色產(chǎn)品： TimerBlox?
標(biāo)準(zhǔn)包裝： 1
系列： TimerBlox®
主要目的： 計(jì)時(shí)，時(shí)鐘振蕩器
嵌入式： 否
已用 IC / 零件： LTC6990，LTC6991，LTC6992-1，LTC6993-2，LTC6994-1
已供物品： 裸板，樣品 IC
LTC6990
5
6990fc
For more information www.linear.com/LTC6990
TYPICAL PERFORMANCE CHARACTERISTICS
VSET vs ISET
VSET vs Supply Voltage
VSET vs Temperature
Frequency Error vs RSET
Frequency Error
vs Supply Voltage
Frequency Error vs Temperature
V+ = 3.3V, unless otherwise noted.
RSET (k)
FREQUENCY
ERROR
(%)
6990 G01
4
3
2
1
–1
–2
–3
0
–4
10
100
1000
TA = 25°C
GUARANTEED MAX
OVER TEMPERATURE
GUARANTEED MIN
OVER TEMPERATURE
TYPICAL MAX
90% OF UNITS
TYPICAL MIN
SUPPLY VOLTAGE (V)
FREQUENCY
ERROR
(%)
6990 G02
0.5
0.4
0.3
0.1
0.2
–0.1
–0.2
–0.3
0
–0.5
–0.4
2
4
3
5
6
TA = 25°C
RSET = 800k
RSET = 200k
RSET = 50k
ISET (A)
V SET
(V)
6990 G04
1.003
1.002
1.001
1.000
0
20
10
30
40
V+ = 3.3V
TA = 25°C
SUPPLY VOLTAGE (V)
V SET
(V)
6990 G05
1.003
1.002
1.001
1.000
2
4
3
5
6
RSET = 200k
TA = 25°C
TEMPERATURE (°C)
V SET
(V)
6990 G06
1.020
1.005
1.000
1.010
1.015
0.995
0.990
0.985
0.980
–50
75
50
0
25
–25
100 125
RSET = 200k
3 TYPICAL PARTS
TEMPERATURE (°C)
ERROR
(%)
6990 G03
1.5
0.5
1.0
0.0
–0.5
–1.0
–1.5
–50 –25
25
50
0
100
75
125
V+ = 3.3V
DIVCODE = 4
RSET = 50k
RSET = 267k
RSET = 800k
ELECTRICAL CHARACTERISTICS
Note 11: Long-term drift of silicon oscillators is primarily due to the
movement of ions and impurities within the silicon and is tested at 30°C
under otherwise nominal operating conditions. Long-term drift is specified
as ppm/√kHr due to the typically nonlinear nature of the drift. To calculate
drift for a set time period, translate that time into thousands of hours, take
the square root and multiply by the typical drift number. For instance, a
year is 8.77kHr and would yield a drift of 266ppm at 90ppm/√kHr. Drift
without power applied to the device may be approximated as 1/10th of the
drift with power, or 9ppm/√kHr for a 90ppm/√kHr device.
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