參數(shù)資料
型號(hào): LTC1290BISW
廠商: LINEAR TECHNOLOGY CORP
元件分類(lèi): ADC
英文描述: Single Chip 12-Bit Data Acquisition System
中文描述: 8-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO20
封裝: 0.300 INCH, PLASTIC, SOP-20
文件頁(yè)數(shù): 10/28頁(yè)
文件大小: 381K
代理商: LTC1290BISW
10
LTC 1290
U
S
A
O
PPLICATI
U
U
MUX Address
The first four bits of the input word 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 Table 1. Note that in differential
MUX ADDRESS
SGL/
DIFF
SIGN
0
0
0
0
0
0
0
0
0
1
0
1
0
1
0
1
DIFFERENTIAL CHANNEL SELECTION
Table 1. Multiplexer Channel Selection
MUX ADDRESS
SGL/
DIFF
SIGN
1
0
1
0
1
0
1
0
1
1
1
1
1
1
1
1
SELECT
1 0
0
0
1
1
0
0
1
1
ODD
0
1
0
1
0
1
0
1
+
+
+
+
+
+
+
+
ODD
SELECT
1 0
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
+
+
+
+
+
+
+
+
0
1
2
3
4
5
6
7
0 1 2 3 4 5 6 7 COM
SINGLE-ENDED CHANNEL SELECTION
mode (SGL/DIFF = 0) measurements are limited to four
adjacent input pairs with either polarity. In single-ended
mode, all input channels are measured with respect to
COM.
Figure 1. Examples of Multiplexer Options on the LTC1290
0
1
2
3
4
5
6
7
CHANNEL
COM (
)
8 Single-Ended
+
+
+
+
+
+
+
0,1
CHANNEL
{
4 Differential
2,3
4,5
6,7
+
(
)
(
+
)
+
+
(
)
(
+
)
+
(
)
(
+
)
+
(
)
(
+
)
4
5
6
7
CHANNEL
{
COM (
)
Combinations of Differential and Single-Ended
+
+
+
+
+
+
0,1
2,3
COM (UNUSED)
Changing the MUX Assignment “On the Fly”
COM (
)
4,5
6,7
5,4
1ST CONVERSION
2ND CONVERSION
+
+
+
+
+
7
6
{
{
{
{
{
{
{
{
LTC1290 F01
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