LTC1096 View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
'LTC1096' PDF : 28 Pages View PDF
LTC1096/LTC1096L
LTC1098/LTC1098L
APPLICATIONS INFORMATION
Multiplexer (MUX) Address
The bits of the input word following the START bit assign
the MUX configuration for the requested conversion. For
a given channel selection, the converter will measure the
voltage between the two channels indicated by the “+”
and “–” signs in the selected row of the followintg tables.
In single-ended mode, all input channels are measured
with respect to GND.
LTC1098(L) Channel Selection
SINGLE-ENDED MUX MODE
DIFFERENTIAL MUX MODE
MUX ADDRESS
SGL/DIFF ODD/SIGN
1
0
1
1
0
0
0
1
CHANNEL #
0
1 GND
+
–
+–
+
–
–
+
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MSB-First/LSB-First (MSBF)
The output data of the LTC1098(L) is programmed for
MSB-first or LSB-first sequence using the MSBF bit.
When the MSBF bit is a logical one, data will appear on
the DOUT line in MSB-first format. Logical zeros will be
filled in indefinitely following the last data bit. When the
MSBF bit is a logical zero, LSB-first data will follow the
normal MSB-first data on the DOUT line. (see Operating
Sequence)
Unipolar Transfer Curve
The LTC1096(L)/LTC1098(L) are permanently configured
for unipolar only. The input span and code assignment for
this conversion type are shown in the following figures
for a 5V reference.
Unipolar Transfer Curve
11111111
11111110
•
•
•
00000001
VIN
00000000
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Unipolar Output Code
OUTPUT CODE
11111111
11111110
•
•
•
00000001
00000000
INPUT VOLTAGE
VREF – 1LSB
VREF – 2LSB
•
•
•
1LSB
0V
INPUT VOLTAGE
(VREF = 5.000V)
4.9805V
4.9609V
•
•
•
0.0195V
0V
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Operation with DIN and DOUT Tied Together
The LTC1098(L) can be operated with DIN and DOUT tied
together. This eliminates one of the lines required to com-
municate to the microprocessor (MPU). Data is transmit-
ted in both directions on a single wire. The processor pin
connected to this data line should be configurable as either
an input or an output. The LTC1098(L) will take control of
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