LTC6957-3_15 Datasheet, PDF (33/36 Pages) Linear Technology – Low Phase Noise, Dual Output Buffer/Driver/ Logic Converter

Typical Applications
LTC6957-1/LTC6957-2/
LTC6957-3/LTC6957-4
Crystal Oscillator
5V_IN+
1µF
0.01µF
BP ^OUT
LT1761-3.3V
TO ALL V⁺ POINTS
0.1µF _V⁺
3.3V
10µF
50MHz
BANDWIDTH
V⁺
V⁺
30pF
2k
FILTA
1
6 ^FILTB
IN⁺
3
4 ^IN–
2 _V+
LTC6957-3
GND
5
12 _SD1
V_{DD 11}
OUT1
10
OUT2 ₉
GNDOUT
8
SD2
7
100Ω
150Ω
75pF
10MHz
AT CUT
0.1µF
450Ω
OUT TO 50Ω
0.3V_P-P
SQUARE WAVE
6957 TA02a
Total Phase Noise of 10MHz Crystal Oscillator
–40
–50
–60
–70
–80
–90
–100
–110
–120
–130
–140
–150
–160
–170
1
MEASURED ON AGILENT E5052A
10 CORRELATIONS
1Hz –47.34dBc/Hz
10Hz –82dBc/Hz
100Hz –116.36dBc/Hz
1kHz –148.03dBc/Hz
10kHz –154.84dBc/Hz
100kHz –157.58dBc/Hz
1MHz –157.99dBc/Hz
10
100
1k
10k 100k 1M
OFFSET FREQUENCY (Hz)
6957 TA02b
For more information www.linear.com/LTC6957-1
6957f
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