LTC6990 查看數據表（PDF） - Analog Devices
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LTC6990 Datasheet PDF : 30 Pages
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LTC6990
TYPICAL PERFORMANCE CHARACTERISTICS V+ = 3V, unless otherwise noted.
Typical Frequency Error vs
Time (Long-Term Drift)
200
65 UNITS
150 SOT-23 AND DFN PARTS
TA = 30°C
100
50
0
–50
–100
–150
–200
0
400 800 1200 1600 2000 2400 2800
TIME (h)
6990 G15a
Rise and Fall Time
vs Supply Voltage
3.0
2.5
TA = 25°C
CLOAD = 5pF
2.0
tRISE
1.5
tFALL
1.0
0.5
0
2
3
4
5
6
SUPPLY VOLTAGE (V)
6990 G16
Output Disable Propagation Delay
(tPD) vs Supply Voltage
50
TA = 25°C
45
CLOAD = 5pF
40
35
30
25
20
15
10
5
0
2
3
4
5
6
SUPPLY VOLTAGE (V)
6990 G17
Typical ISET Current Limit vs V+
1000
TA = 25°C
SET PIN SHORTED TO GND
800
600
400
200
0
2
3
4
5
6
SUPPLY VOLTAGE (V)
6990 G18
Typical Output Waveform
V+ = 3.3V
DIVCODE = 2
RSET = 200k
OE
2V/DIV
OUT
2V/DIV
20µs/DIV
6990 G19
Frequency Modulation
VCTRL
2V/DIV
OUT
2V/DIV
Frequency Modulation
VCTRL
2V/DIV
OUT
2V/DIV
fOUT
50kHz/DIV
20µs/DIV
V+ = 3.3V, DIVCODE = 0
RSET = 200k, RVCO = 464k
fOUT = 175kHz to 350kHz
6990 G20
fOUT
50kHz/DIV
20µs/DIV
V+ = 3.3V, DIVCODE = 0
RSET = 200k, RVCO = 464k
fOUT = 175kHz to 350kHz
6990 G21
For more information www.analog.com
Rev. D
7
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