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PDF LTC6930-7.37 Data sheet ( Hoja de datos )
| Número de pieza | LTC6930-7.37 | |
| Descripción | 32.768kHz to 8.192MHz Precision uPower Oscillators | |
| Fabricantes | Linear | |
| Logotipo |  |
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Features
n Frequency Error <0.09% Max at 25°C
n Start-Up Time <110µs at All Frequencies
n 1.7V to 5.5V Single Supply Operation
n 105µA Typical Supply Current at 32kHz, V+ = 3V
n 490µA Typical Supply Current at 8MHz, V+ = 3V
n Typical RMS Period Jitter <0.15% at V+ = 3V
n No External Components to Set Frequency
n 5 Options Cover 32.768kHz to 8.192MHz:
LTC6930-4.19: 4.194304MHz ÷ N
LTC6930-5.00: 5.000000MHz ÷ N
LTC6930-7.37: 7.372800MHz ÷ N
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)
n –55°C to 125°C Operating Temperature Range
n Tiny 2mm 3mm DFN or MS8 Package
Applications
n Digitally Controlled Oscillator
n Microprocessor Clock
n Power Supply Clock
n Portable and Battery Operated Devices
LTC6930-X.XX
32.768kHz to 8.192MHz
Precision µPower Oscillators
Description
The LTC®6930 series is a family of very low power precision
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.
The LTC6930 features a proprietary control architecture
that allows for ultralow power operation while maintaining
industry leading accuracy and jitter specifications. The
exceptionally fast start-up time, combined with the low
power consumption, is ideal for battery operated applica-
tions with frequent power-up cycles.
Any frequency from 32.768kHz to 8.192MHz can be pro-
vided by the factory. Minimum order sizes apply for custom
frequencies. Please consult LTC Marketing for details.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property
of their respective owners. Protected by U.S. Patents, including 6342817, 6614313.
Typical Application
4MHz Micropower Clock Generator
V+ = 1.7V TO 5.5V
IS = 325µA AT 3VDC
0.1µF
V+ V+
DIVA
OUT
LTC6930-8.00
DIVB
DIVC
GND
GND
4MHz
6930 TA01a
Typical Frequency Error Distribution
70
60
VTA+
=
=
25°C
3V
DIV = 0
1045 UNITS
50
40
30
20
10
0
–0.10
–0.05
0
0.05
FREQUENCY ERROR (%)
0.10
6930 TA01b
For more information www.linear.com/LTC6930
6930fe
1
1 page  
LTC6930-X.XX
D C Electrical Characteristics The l denotes the specifications which apply over the full operating
otepmerpaetrinagtusreuprpalnygveo, lotathgeerawnisdefrsepqeuceifniccyatoiountpsuat:reV+at=T1A.=7V25to°C5..5UVnlaensds
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
l 0.7
1.25
V
IIN
Digital Input Leakage Current, All
Digital Input Pins
0 < VIN < V+
l ±1 µA
ROUT Output Resistance
VOH High Level Output Voltage
OUT Pin, V+ = 3V
DIVA = DIVB = DIVC = 0, No Load
V+ = 5.5V
V+ = 3V
V+ = 2V
V+ = 1.7V
l 5.4
l 2.9
l 1.8
40
5.5
3
2
1.7
Ω
V
V
V
V
DIVA = DIVB = DIVC = 0, 1kΩ Load to GND
V+ = 5.5V
V+ = 3V
V+ = 2V
V+ = 1.7V
l5
l 2.6
l 1.5
5.2
2.7
1.6
1.5
V
V
V
V
VOL Low Level Output Voltage
DIVA = DIVB = DIVC = 0, No Load
V+ = 5.5V
V+ = 3V
V+ = 2V
V+ = 1.7V
l
0 0.1
V
l
0 0.1
V
l
0 0.1
V
0V
DIVA = DIVB = DIVC = 0, 1kΩ Load to V+
V+ = 5.5V
V+ = 3V
V+ = 2V
V+ = 1.7V
l
l
l
0.3 0.7
0.3 0.5
0.3 0.35
0.3
V
V
V
V
Timing Characteristics The l denotes the specifications which apply over the full operating temperature
vraonltgaeg,eoathnedrfwreisqeuesnpceyciofiuctaptuiot:nVs+a=re1a.7t VTAto=52.55°VCa. nUdnlfeOsUsT
otherwise noted, specifications apply over the full
= 32.768kHz to 8.192MHz with CLOAD = 5pF, RLOAD
range
= ∞.
of
operating
supply
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
3
l 35 50 65
l 35 50 70
l 48 50 52
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
5
5 Page 
Package Description
DCB Package
8-Lead Plastic DFN (2mm × 3mm)
(Reference LTC DWG # 05-08-1718 Rev A)
LTC6930-X.XX
3.50 ±0.05
2.10 ±0.05
0.70 ±0.05
1.35 ±0.05
1.65 ± 0.05
PACKAGE
OUTLINE
1.35 REF
0.25 ± 0.05
0.45 BSC
RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED
2.00 ±0.10
(2 SIDES)
R = 0.115
R = 0.05
TYP
TYP
5
0.40 ± 0.10
8
PIN 1 BAR
TOP MARK
(SEE NOTE 6)
0.200 REF
3.00 ±0.10
(2 SIDES)
0.75 ±0.05
0.00 – 0.05
1.35 ±0.10
1.65 ± 0.10
PIN 1 NOTCH
R = 0.20 OR 0.25
× 45° CHAMFER
(DCB8) DFN 0106 REV A
41
0.23 ± 0.05
0.45 BSC
1.35 REF
BOTTOM VIEW—EXPOSED PAD
NOTE:
1. DRAWING IS NOT A JEDEC PACKAGE OUTLINE
2. DRAWING NOT TO SCALE
3. ALL DIMENSIONS ARE IN MILLIMETERS
4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE
MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE
5. EXPOSED PAD SHALL BE SOLDER PLATED
6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE
TOP AND BOTTOM OF PACKAGE
For more information www.linear.com/LTC6930
6930fe
11
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet LTC6930-7.37.PDF ] | |
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