Datasheet
LTC6930-X.XX
5
6930fd
The l denotes the specifications which apply over the full operating temperature
range, otherwise specifications are at T
A
= 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 f
OUT
= 32.768kHz to 8.192MHz with C
LOAD
= 5pF, R
LOAD
= ∞.
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 f
NOM
= 4.194304MHz
LTC6930-5.00 f
NOM
= 5.000000MHz
LTC6930-7.37 f
NOM
= 7.372800MHz
LTC6930-8.00 f
NOM
= 8.000000MHz
LTC6930-8.19 f
NOM
= 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
t
rf
Output Rise/Fall Time (10% to 90%) V
+
= 3V 3 ns
DCY Duty Cycle DIVA = DIVB = DIVC = 0; V
+
= 2V to 5.5V
DIVA = DIVB = DIVC = 0
DIVA or DIVB or DIVC ≠ 0
l
l
l
35
35
48
50
50
50
65
70
52
%
%
%
D
DIV
DIV to F
OUT
Delay Edge of DIV Signal to 1st Accurate Output Cycle 1 Cycle
D
PON
Power On Delay V
+
> 1.7V to 1st Accurate Output Cycle
l
110 µs
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 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 C
LOAD
= 5pF, R
LOAD
= ∞.
DC ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IL
Maximum Low Level Input Voltage,
All Digital Input Pins
l
0.7 1.25 V
I
IN
Digital Input Leakage Current, All
Digital Input Pins
0 < V
IN
< V
+
l
±1 µA
R
OUT
Output Resistance OUT Pin, V
+
= 3V 40 Ω
V
OH
High Level Output Voltage DIVA = DIVB = DIVC = 0, No Load
V
+
= 5.5V
V
+
= 3V
V
+
= 2V
V
+
= 1.7V
l
l
l
5.4
2.9
1.8
5.5
3
2
1.7
V
V
V
V
DIVA = DIVB = DIVC = 0, 1kΩ Load to GND
V
+
= 5.5V
V
+
= 3V
V
+
= 2V
V
+
= 1.7V
l
l
l
5
2.6
1.5
5.2
2.7
1.6
1.5
V
V
V
V
V
OL
Low Level Output Voltage DIVA = DIVB = DIVC = 0, No Load
V
+
= 5.5V
V
+
= 3V
V
+
= 2V
V
+
= 1.7V
l
l
l
0
0
0
0
0.1
0.1
0.1
V
V
V
V
DIVA = DIVB = DIVC = 0, 1kΩ Load to V
+
V
+
= 5.5V
V
+
= 3V
V
+
= 2V
V
+
= 1.7V
l
l
l
0.3
0.3
0.3
0.3
0.7
0.5
0.35
V
V
V
V