Linear Technology DC814, Быстрый старт

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DC814 QUICK START QUIDE
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DESCRIPTION
Demonstration circuit DC814 is for the evaluation of Linear Tech-
nology’s resistor set oscillator ICs in a SO T-23 package. The
DC814 is available in three sets of independent PCB assemblies:
A Buffer Board (DC814A-X) and
Tw o D IP-8 Clock Boards (DC814B-X) and (DC814C-X).
The buffer board contains a DIP-8 clock board mounted on a
DIP-8 socket and a multi-turn potentiometer for adjusting the
frequency of the DIP-8 clock. The output of the DIP-8 clock is
buffered by a high speed driver (the buffer’s maximum output
current is ±100mA). The output of the buffer is connected thru a
50 ohm resistor to a BN C connector for driving oscilloscope
probes and 50 ohm coaxial cables.
Table 1. Buffer Board Part Num bers
Buffer Board Clock IC
DC814A-A LTC6905
DC814A-B LTC1799
DC814A-C LTC6900
DC814A-D LTC6905-133
DC814A-E LTC6905-100
DC814A-F LTC6905-96
DC814A-G LTC6905-80
DC814A-H LTC6906
DC814A-I LTC6907
A buffer board can easily be set up for evaluation using one
pow er supply, an oscilloscope and a frequency counter (see fig-
ure 4). A DIP-8 clock board can be removed from the buffer
board and used independently as a clock source to a digital pro-
totype system. The DIP-8 clock board has surface mount pads
for installing an 0603 size resistor (R S1 on clock board) w hen it
is used independently of the clock buffer board.
The DIP-8 clock boards for the LTC6905-XXX series do not re-
quire an R SET resistor and can be used as fixed frequency
clocks. The size of the DIP-8 clock board is equivalent to the
“half-size” canned crystal oscillators (13mmx13mm).
The DIP-8 clock boards can be ordered independently of a buffer
board and have the follow ing part numbers:
Table 2. D IP-8 Clock Board Part N umbers
DIP-8 Clock Board Clock IC
DC814B-A LTC6905
DC814B-B LTC1799
DC814B-C LTC6900
DC814B-D LTC6905-133
DC814B-E LTC6905-100
DC814B-F LTC6905-96
DC814B-G LTC6905-80
DC814C-H LTC6906
DC814C-I LTC6907
Design files for these circuit boards are available. Call
the LTC factory.
, LTC and LT are registered trademarks of Linear Technology Corporation. ThinSOT
and Pow erPath are trademarks of Linear Technology Corporation.
DEMO CIRCUIT DC814
QUICK START GUIDE
RESISTOR SET OSCILLATORS IN SOT-23:
LTC6905, LTC1799, LTC6900, LTC6905-XXX,
LTC6906, LTC6907