LTC6930 datasheet(5/12 Pages) LINER

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LTC6930-X.XX

6930fa

The

l denotes the speciﬁcations which apply over the full operating temperature

range, otherwise speciﬁcations are at TA = 25°C. Unless otherwise noted, speciﬁcations apply over the full range of operating supply

voltage and frequency output: V+ = 1.7V to 5.5V and fOUT = 32.768kHz to 8.192MHz with CLOAD = 5pF, RLOAD = ∞.

TIMING CHARACTERISTICS

Note 1: Stresses beyond those listed under Absolute Maximum Ratings

may cause permanent damage to the device. Exposure to any Absolute

Maximum Rating condition for extended periods may affect device

reliability and lifetime.

Note 2: LTC6930C is guaranteed functional over the operating range of

–40°C to 85°C.

Note 3: The LTC6930C is guaranteed to meet speciﬁed performance from

0°C to 70°C. The LTC6930C is designed, characterized and expected to

meet speciﬁed performance from –40°C to 85°C but is not tested or QA

sampled at these temperatures. The LTC6930I is guaranteed to meet

speciﬁed performance from –40°C to 85°C. The LTC6930H is guaranteed

to meet speciﬁed performance from –40°C to 125°C.

Note 4: Frequency accuracy and frequency drift are deﬁned as deviation

from the nominal frequency or the nominal frequency divided by the

integer set through the DIV pins for each part. The nominal frequency for

the LTC6930 family of parts are deﬁned as follows:

LTC6930-4.19

fNOM = 4.194304MHz

LTC6930-5.00

fNOM = 5.000000MHz

LTC6930-7.37

fNOM = 7.372800MHz

LTC6930-8.00

fNOM = 8.000000MHz

LTC6930-8.19

fNOM = 8.192000MHz

Note 5: 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 non-linear 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 89ppm at 30ppm/√kHr. Drift

without power applied to the device may be approximated as 1/10th of the

drift with power, or 3ppm/√kHr for a 30ppm/√kHr device.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

trf

Output Rise/Fall Time (10% to 90%) V+ = 3V

DCY

Duty Cycle

DIVA = DIVB = DIVC = 0; V+ = 2V to 5.5V

DIVA = DIVB = DIVC = 0

DIVA or DIVB or DIVC ≠ 0

DDIV

DIV to FOUT Delay

Edge of DIV Signal to 1st Accurate Output Cycle

Cycle

DPON

Power On Delay

V+ > 1.7V to 1st Accurate Output Cycle

110

μs

The

l denotes the speciﬁcations which apply over the full operating

temperature range, otherwise speciﬁcations are at TA = 25°C. Unless otherwise noted, speciﬁcations apply over the full range of

operating supply voltage and frequency output: V+ = 1.7V to 5.5V and all DIV settings with CLOAD = 5pF, RLOAD = ∞.

DC ELECTRICAL CHARACTERISTICS

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

VIL

Maximum Low Level Input Voltage,

All Digital Input Pins

0.7

1.25

IIN

Digital Input Leakage Current, All

Digital Input Pins

0 < VIN < V+

±1

μA

ROUT

Output Resistance

OUT Pin, V+ = 3V

VOH

High Level Output Voltage

DIVA = DIVB = DIVC = 0, No Load

V+ = 5.5V

V+ = 3V

V+ = 2V

V+ = 1.7V

5.4

2.9

1.8

5.5

1.7

DIVA = DIVB = DIVC = 0, 1k

Ω Load to GND

V+ = 5.5V

V+ = 3V

V+ = 2V

V+ = 1.7V

2.6

1.5

5.2

2.7

1.6

1.5

VOL

Low Level Output Voltage

DIVA = DIVB = DIVC = 0, No Load

V+ = 5.5V

V+ = 3V

V+ = 2V

V+ = 1.7V

0.1

DIVA = DIVB = DIVC = 0, 1k

Ω Load to V+

V+ = 5.5V

V+ = 3V

V+ = 2V

V+ = 1.7V

0.3

0.7

0.5

0.35

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