LTC6930 查看數據表（PDF） - Linear Technology
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LTC6930 Datasheet PDF : 14 Pages
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LTC6930-X.XX
DC Electrical Characteristics The l denotes the specifications which apply over the full operating
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otherwise noted, specifications apply over the
all DIV settings with CLOAD = 5pF, RLOAD = ∞.
full
range
of
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VIL
Maximum Low Level Input Voltage,
All Digital Input Pins
IIN
Digital Input Leakage Current, All 0 < VIN < V+
Digital Input Pins
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
l 0.7
1.25
V
l
±1
µA
40
Ω
l 5.4
5.5
V
l 2.9
3
V
l 1.8
2
V
1.7
V
DIVA = DIVB = DIVC = 0, 1kΩ Load to GND
V+ = 5.5V
l
5
5.2
V
V+ = 3V
l 2.6
2.7
V
V+ = 2V
l 1.5
1.6
V
V+ = 1.7V
1.5
V
VOL
Low Level Output Voltage
DIVA = DIVB = DIVC = 0, No Load
V+ = 5.5V
l
V+ = 3V
l
V+ = 2V
l
V+ = 1.7V
DIVA = DIVB = DIVC = 0, 1kΩ Load to V+
V+ = 5.5V
l
V+ = 3V
l
V+ = 2V
l
V+ = 1.7V
0
0.1
V
0
0.1
V
0
0.1
V
0
V
0.3
0.7
V
0.3
0.5
V
0.3
0.35
V
0.3
V
Timing Characteristics The l denotes the specifications which apply over the full operating temperature
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otherwise noted, specifications apply over the full
= 32.768kHz to 8.192MHz with CLOAD = 5pF, RLOAD
range
= ∞.
of
operating
supply
SYMBOL
trf
DCY
PARAMETER
CONDITIONS
Output Rise/Fall Time (10% to 90%) V+ = 3V
Duty Cycle
DIVA = DIVB = DIVC = 0; V+ = 2V to 5.5V
DIVA = DIVB = DIVC = 0
DIVA or DIVB or DIVC ≠ 0
MIN
TYP
MAX
3
l 35
50
65
l 35
50
70
l 48
50
52
UNITS
ns
%
%
%
DDIV
DPON
DIV to OUT Delay
Power On Delay
Edge of DIV Signal to 1st Accurate Output Cycle
V+ > 1.7V to 1st Accurate Output Cycle
l
1
110
Cycle
µs
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. The LTC6930MP is
guaranteed to meet specified performance from –55°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.
6930fe
For more information www.linear.com/LTC6930
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