LTC1296BISW データシートの表示（PDF） - Linear Technology
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LTC1296BISW Datasheet PDF : 28 Pages
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LTC1293/LTC1294/LTC1296
APPLICATI
S I FOR ATIO
Power Shutdown Operating Sequence
Example: Differential Inputs (CH4+, CH5–), Unipolar Mode and MSB-First Data
CS
REQUEST POWER SHUTDOWN
SHUTDOWN*
NEW CONVERSION BEGINS
CLK
DIN
DOUT
START
SEL1 UNI PS
SEL1/ ODD/ SEL0 MSBF
DIFF SIGN
HI-Z
DON'T CARE
B11 • • • • • • • • • • B0 FILLED
WITH
ZEROES
*STOPPING THE CLOCK WILL HELP REDUCE POWER CONSUMPTION.
CS CAN BE BROUGHT HIGH ONCE THE DIN WORD HAS BEEN CLOCKED IN.
START
SEL1 UNI PS
MSBF
SEL1/ ODD/ SEL0
DIFF SIGN
HI-Z
LTC1293 AI06
all logical ones will be shifted out followed by logical
zeroes till CS goes high. Then the DOUT line will go into its
high impedance state. The LTC 1293/4/6 will remain in the
shutdown mode till the next CS cycle. There is no warm-
up or wait period required after coming out of the power
shutdown cycle so a conversion can commence after CS
goes low (see Power Shutdown Operating Sequence). The
LTC1296 has a System Shutdown Output pin (SSO) which
will go low when power shutdown is activated. The pin will
stay low till next CS cycle.
Microprocessor Interfaces
The LTC1293/4/6 can interface directly (without external
hardware) to most popular microprocessors (MPU) syn-
chronous serial formats (see Table 1). If an MPU without
a dedicated serial port is used, then three of the MPU’s
parallel port lines can be programmed to form the serial
link to the LTC1293/4/6. Included here are one serial
interface example and one example showing a parallel
port programmed to form the serial interface.
Microprocessor Interfaces
The LTC1293/4/6 can interface directly (without external
hardware) to most popular microprocessors (MPU) syn-
chronous serial formats (see Table 1). If an MPU without
a dedicated serial port is used, then three of the MPU’s
parallel port lines can be programmed to form the serial
link to the LTC1293/4/6.
Table 1. Microprocessor with Hardware Serial Interfaces Compat-
ible with the LTC1293/4/6**
PART NUMBER
Motorola
MC6805S2, S3
MC68HC11
MC68HC05
RCA
CDP68HC05
Hitachi
HD6305
HD6301
HD63701
HD6303
HD64180
National Semiconductor
COP400 Family
COP800 Family
NS8050U
HPC16000 Family
Texas Instruments
TMS7002
TMS7042
TMS70C02
TMS70C42
TMS32011*
TMS32020*
TMS370C050
TYPE OF INTERFACE
SPI
SPI
SPI
SPI
SCI Synchronous
SCI Synchronous
SCI Synchronous
SCI Synchronous
SCI Synchronous
MICROWIRE†
MCROWIRE/PLUS†
MICROWIRE/PLUS
MICROWIRE/PLUS
Serial Port
Serial Port
Serial Port
Serial Port
Serial Port
Serial Port
SPI
* Requires external hardware
** Contact factory for interface information for processors not on this list
† MICROWIRE and MICROWIRE/PLUS are trademarks of National
Semiconductor Corp.
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129346fs
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