3
Spread-spectrum oscillators reduce peak
EMI by over 20dB
Factory-trimmed frequency and dither settings reduce time to market
Most applications must meet the stringent radiated-emissions compliance standards established by
government agencies. Yet, most crystal oscillators (XOs) do not offer inherent EMI reduction, forcing designers
to use expensive shielding, filtering, or PCB-layout techniques to meet these EMI-compliance standards. Our
spread-spectrum silicon oscillators solve this problem by spreading radiated emissions over a narrow spectrum,
thus reducing peak energy at any one frequency. These oscillators are ideal for use as a frequency source for
µPs in applications with RS-232, USB, CAN, or LIN peripherals, including automotive infotainment/GPS, POS
terminals, and office equipment.
Reduce peak EMI by over 20dB
·
75% smaller than typical SMT XO
·
Lower active and standby power than
·
typical XO
Fast, reliable startup
·
Less sensitive to shock/vibration than
·
typical XO
Wider temperature range than typical XO
·
No price premium for higher frequency
·
selections
Factory trimmed, no programming required
·
No external timing components required
·
-60
-50
-40
-30
-20
-10
0
44
46
48
50
52
54
56
±2%
±4%
±8%
> 20dB EMI IMPROVEMENT OVER XOs
f
OSC
= 50MHz
DITHER FREQ = f
OSC
/4096
RBW = 120kHz
SAMPLE DETECT
FREQUENCY (MHz)
POWER SPECTRUM (dBm)
TYPICAL XO
DS1089L
DITHER OUTPUT
3mm
5.8mm
5mm
10.5mm
Typical XO
SMT package
8-µMAX
75%
smaller
1000-up recommended resale. Prices provided are for design guidance and are FOB USA. International prices will differ due to local duties, taxes, and exchange rates.
Not all packages are offered in 1k increments, and some may require minimum order quantities.
Part
Min Output
Freq (kHz)
Max Output
Freq (MHz)
Spread
Spectrum
Dither-Mag
Range (%)
Dither-Freq
Range (f
OSC
/x)
Power
Supply (V)
Temp
Range (°C)
Package
Price
($)
DS1086
260
133
Down
0 to -4
4096
5.0, ±5%
0 to +70
8-SO
0.90
DS1086L
130
66.6
Down
0 to -8
2048 to 8192
2.7 to 3.6
-40 to +85
8-µMAX
0.90
DS1087L
130
66.6
Down
0 to -4
4096
2.7 to 3.6
0.85
DS1089L
130
66.6
Centered
0 to ±8
2048 to 8192
2.7 to 3.6
0.85
DS1090
125
8
Centered
0 to ±4
512 to 4096
2.7 to 5.5
0.68
DS1091L
130
66.6
Centered,
down
0 to ±4,
0 to -8
16 to 8192
3.0 to 3.6
-40 to +125
0.72
DS1094L
31.25
2
Down
0 to -8
128 to 1024
3.0 to 3.6
-40 to +85
1.93