LTC6930-X.XX
32.768kHz to 8.192MHz
Precision µPower Oscillators
FEATURES
DESCRIPTION
TheLTC®6930seriesisafamilyofverylowpowerprecision
silicon oscillators with a frequency error less than 0.09%.
For each oscillator, the user can select one of 8 frequen-
cies between 32.768kHz and 8.192MHz. Based on a fixed
master oscillator frequency, internal frequency dividers
between 1 and 128 provide the 8 different frequencies.
The LTC6930 requires no external components other than
power supply bypass capacitors. Requiring only a single
1.7V to 5.5V supply enables operation from a single Li-Ion
cell or 2 AA alkaline cells.
n
Frequency Error <0.09% Max at 25°C
n
Startup Time <110μs at All Frequencies
n
1.7V to 5.5V Single Supply Operation
+
n
105μA Typical Supply Current at 32kHz, V = 3V
+
n
n
n
n
490μA Typical Supply Current at 8MHz, V = 3V
+
Typical RMS Period Jitter <0.15% at V = 3V
No External Components to Set Frequency
5 Options Cover 32.768kHz to 8.192MHz:
LTC6930-4.19: 4.194304MHz ÷ N
LTC6930-5.00: 5.000000MHz ÷ N
LTC6930-7.37: 7.373800MHz ÷ N
The LTC6930 features a proprietary control architecture
that allows for ultra-low power operation while maintain-
ingindustryleadingaccuracyandjitterspecifications. The
exceptionally fast start-up time, combined with the low
power consumption, is ideal for battery operated applica-
tions with frequent power-up cycles.
LTC6930-8.00: 8.000000MHz ÷ N
LTC6930-8.19: 8.192000MHz ÷ N
Where N = 1, 2, 4, 8, 16, 32, 64, 128
(N Determined by State of DIVA, DIVB, DIVC Pins)
–40°C to 125°C Operating Temperature Range
Tiny 2mm × 3mm DFN or MS8 Package
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Any frequency from 32.768kHz to 8.192MHz can be pro-
videdbythefactory.Minimumordersizesapplyforcustom
frequencies. Please consult LTC Marketing for details.
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other
trademarks are the property of their respective owners. Protected by U.S. Patents including
6342817, 6614313.
APPLICATIONS
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Digitally Controlled Oscillator
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Microprocessor Clock
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Power Supply Clock
Portable and Battery Operated Devices
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TYPICAL APPLICATION
4MHz Micropower Clock Generator
Typical Frequency Error Distribution
+
70
V
S
= 1.7V TO 5.5V
T
= 25°C
= 3V
A
+
I
= 325μA AT 3V
DC
V
60
50
40
30
20
10
0
DIV = 0
1045 UNITS
0.1μF
+
+
V
V
DIVA
OUT
LTC6930-8.00
DIVB
4MHz
DIVC
GND
GND
–0.10
–0.05
0
0.05
0.10
6930 TA01a
FREQUENCY ERROR (%)
6930 TA01b
6930fa
1