LTC1289BCN Linear Technology, LTC1289BCN Datasheet - Page 10

• Manufacturer Part Number: LTC1289BCN
• Description: IC DATA ACQ SYS 12BIT 3V 20-DIP
• Manufacturer: Linear Technology
• Type: Data Acquisition System (DAS)r

Specifications of LTC1289BCN

• Resolution (bits): 12 b
• Sampling Rate (per Second): 25k
• Data Interface: Serial, Parallel
• Voltage Supply Source: Dual ±
• Voltage - Supply: 3V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Through Hole
• Package / Case: 20-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

LTC1289
A
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
10
Table 1. Multiplexer Channel Selection
SGL/
DIFF
PPLICATI
0
0
0
0
0
0
0
0
MUX ADDRESS
SIGN
ODD
0
0
0
0
1
1
1
1
CHANNEL
0,1
2,3
4,5
6,7
SELECT
{
{
{
{
1 0
0 0
0 1
1 0
1 1
0 0
0 1
1 0
1 1
4 Differential
O
+
–
+
–
+
–
+
–
(
(
(
(
(
(
(
(
U
–
+
–
+
–
+
–
+
0
+
–
)
)
)
)
)
)
)
)
S
DIFFERENTIAL CHANNEL SELECTION
4,5
6,7
1
–
+
I FOR ATIO
{
{
U
+
–
2
1ST CONVERSION
+
–
+
–
COM (UNUSED)
Figure 1. Examples of Multiplexer Options on the LTC1289
Changing the MUX Assignment “On the Fly”
3
–
+
W
4
+
–
CHANNEL
0
1
2
3
4
5
6
7
5
–
+
U
8 Single-Ended
+
+
+
+
+
+
+
+
COM (
+
–
6
–
)
7
–
+
5,4
6
7
SGL/
DIFF
{
{
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.
1
1
1
1
1
1
1
1
MUX ADDRESS
2ND CONVERSION
SIGN
ODD
COM (
+
+
+
–
0
0
0
0
1
1
1
1
–
Combinations of Differential and Single-Ended
SELECT
)
1 0
0 0
0 1
1 0
1 1
0 0
0 1
1 0
1 1
CHANNEL
0,1
2,3
4
5
6
7
{
{
0
+
SINGLE-ENDED CHANNEL SELECTION
+
1
+
–
–
+
+
+
+
+
COM (
2
+
–
)
3
+
4
+
+
5
LTC1289 AIF01
+
6
+
7
COM
1289fb
–
–
–
–
–
–
–
–