LTC6905I データシートの表示（PDF） - Linear Technology

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LTC6905I

17MHz to 170MHz Resistor Set SOT-23 Oscillator

Linear Technology 

LTC6905

ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full specified

temperature range, otherwise specifications are at TA = 25°C or as noted. V+ = 2.7V to 5.5V, RL = 15k, CL = 5pF, Pin 4 = V+ unless

otherwise noted. All voltages are with respect to GND.

SYMBOL PARAMETER

VOL

Low Level Output Voltage (Note 4)

tr, tf

OUT Rise/Fall Time (Note 5)

VSET

Voltage at RSET Pin

CONDITIONS

V+ = 5.5V, Pin 4 = 0V

V+ = 2.7V, Pin 4 = 0V

IOL = 1mA

IOL = 4mA

IOL = 1mA

IOL = 4mA

V+ = 5.5V

V+ = 2.7V

MIN

TYP

MAX

l

0.05

0.25

l

0.2

0.3

l

0.1

0.3

l

0.4

0.5

0.5

l 4.27

4.5

4.73

l 1.61

1.7

1.79

UNITS

V

V

V

V

ns

V

V

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: Frequency accuracy is defined as the deviation from the fOSC

equation. Accuracy is tested with DIV = V+, N = 1 and other divide ratios

are guaranteed by design.

Note 3: Jitter is the ratio of the peak-to-peak distribution of the period to

the mean of the period. This specification is based on characterization and

is not 100% tested.

Note 4: To conform with the Logic IC Standard convention, current out of

a pin is arbitrarily given as a negative value.

Note 5: Output rise and fall times are measured between the 10% and

90% power supply levels.

Note 6: A heat sink may be required to keep the junction temperature

below the absolute maximum when the output is shorted indefinitely.

Note 7: The LTC6905C is guaranteed functional over the operating

temperature range.

Note 8: The LTC6905C is guaranteed to meet specified performance from

0°C to 70°C. The LTC6905C-XXX 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 LTC6905I-XXX is guaranteed to meet

specified performance from –40°C to 85°C.

Note 9: The LTC6905 is optimized for the performance with a 3V power

supply voltage. Please consult LTC Marketing for parts optimized for 5V

operation.

TYPICAL PERFORMANCE CHARACTERISTICS

Supply Current vs Frequency

18

5.5V

16

2.7V

14

÷1

12

10

÷2

8

÷4

÷1

6

÷2

4 ÷4

2

0

0

50

100

150

200

FREQUENCY (MHz)

6905 G01

Frequency Error vs RSET

0.60

0.40

0.20

0

–0.20

–0.40

–0.60

–0.80

10 12 14 16 18 20 22 24

RSET (kΩ)

6905 G02

Frequency Error vs Supply Voltage

1.40

1.20

1.00

0.80

0.60

0.40

0.20

0

–0.20

–0.40

2.5

3 3.5 4 4.5

SUPPLY VOLTAGE (V)

5 5.5

6905 G03

6905fd

4

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