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DESCRIPTION
Demonstration Circuit 1141A features the LTC6930-
X.XX series family of very low power precision sili-
con oscillators with a frequency error less than
0.09% at 25 ˚C. For each oscillator, the user can
select one of 8 frequencies between 32.768 kHz
and 8.192 MHz. Based on 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 and op-
erates with a single 1.7V to 5.5V supply.
A DC1141A PCB assembly consists of a 2 inch X 2
inch buffer board with a BNC output and a DIP-8
oscillator board mounted on an 8-pin socket. The
DIP-8 oscillator board can be removed from the
buffer board and used for prototyping.
The three digitally controlled inputs of an LTC6930-
X.XX (DIVA, DIVB and DIVC) can be set on a
DC1141A-X with three jumblers or set externally by
connecting wires to the on board turrets.
The Digital Input and Divider Setting:
DIVC DIVB DIVA
DIVIDE BY
0
0
0
1
0
0
1
2
0
1
0
4
0
1
1
8
1
0
0
16
1
0
1
32
1
1
0
64
1
1
1
128
Note: DIVC is the MSB
There are five DC1141A boards:
1. DC1141A-A with an LTC6930-4.19
2. DC1141A-B with an LTC6930-5.00
3. DC1141A-C with an LTC6930-7.37
4. DC1141A-D with an LTC6930-8.00
5. DC1141A-E with an LTC6930-8.19
LTC6930-X.XX, PRECISION DIGITALLY CONTROLLED OSCILLATORS
LTC6930-4.19, LTC6930-5.00, LTC6930-7.37, LTC6930-8.00, LTC6930-8.19
Design files for these circuit boards are available.
Call the LTC factory.
, LTC and LT are registered trademarks of Linear Technology Corporation.
THE LTC6930-X.XX FREQUENCIES
The LTC6930-4.19 (DC1141A-A)
DIVC DIVB DIVA
0
0
0
0
1
1
1
1
The LTC6930-5.00 (DC1141A-B)
DIVC DIVB DIVA
0
0
0
0
1
1
1
1
The LTC6930-7.37 (DC1141A-C)
DIVC DIVB DIVA
0
0
0
0
1
1
1
1
DEMO CIRCUIT 1141A/B
QUICK START GUIDE
32.768KHZ - 8.192MHZ
Frequency
0
0
4.194304MHz
0
1
2.097152MHz
1
0
1.048576MHz
1
1
524.288kHz
0
0
262.144kHz
0
1
131.072kHz
1
0
65.536kHz
1
1
32.768kHz
Frequency
0
0
5.0000MHz
0
1
2.5000MHz
1
0
1.2500MHz
1
1
625.000kHz
0
0
312.500kHz
0
1
156.250kHz
1
0
78.1250kHz
1
1
39.0625kHz
Frequency
0
0
7.3728MHz
0
1
3.6864MHz
1
0
1.8432MHz
1
1
921.6kHz
0
0
460.8kHz
0
1
230.4kHz
1
0
115.2kHz
1
1
57.6kHz
1
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Related Manuals for Linear Technology LTC6930 Series
Summary of Contents for Linear Technology LTC6930 Series
- Page 1 Call the LTC factory. X.XX series family of very low power precision sili- , LTC and LT are registered trademarks of Linear Technology Corporation. con oscillators with a frequency error less than 0.09% at 25 ˚C. For each oscillator, the user can select one of 8 frequencies between 32.768 kHz...
-
Page 2: Quick Start Procedure
DC1141A QUICK START QUIDE The LTC6930-8.00 (DC1141A-D) DIVC DIVB DIVA Frequency The LTC6930-8.19 (DC1141A-E) 8.000MHz DIVC DIVB DIVA Frequency 4.000MHz 8.192MHz 2.000MHz 4.096MHz 1.000MHz 2.048MHz 500.0kHz 1.024MHz 250.0kHz 512.0kHz 125.0kHz 256.0kHz 62.5kHz 128.0kHz 64.0kHz QUICK START PROCEDURE Test Equipment: 1. A single power supply, 3V – 5V. 2. - Page 3 DC1141A QUICK START GUIDE Figure 1. Quick Test Set-Up Power Supply 3.00V DIVA, DIVB, DIV C 000 100MHz Oscilloscope 50ohm input 000000 000000 000000 000000 50ohm input Frequency Counter Connect board to oscilloscope or counter with a 50ohm BNC to BNC cable 3ft...
- Page 4 DC1141A QUICK START QUIDE...
- Page 5 DC1141A QUICK START GUIDE...
- Page 6 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Analog Devices Inc. DC1141A-B DC1141A-E DC1141A-A DC1141A-C DC1141A-D...
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