adc12132 National Semiconductor Corporation, adc12132 Datasheet - Page 26

• Manufacturer Part Number: adc12132
• Description: Self-calibrating 12-bit Plus Sign Serial I/o A/d Converters With Mux And Sample/hold
• Manufacturer: National Semiconductor Corporation

www.national.com
without
DI0 DI1 DI2 DI3 CH0 CH1 CH2 CH3 CH4 CH5 CH6 CH7 COM A/DIN1 A/DIN2 MUXOUT1 MUXOUT2
Sign
Sign
with
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
Format and Set-Up Tables
X = High or Low state.
MUX Address
DO Formats
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
MSB
MSB
First
First
First
First
LSB
LSB
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
Bits
Bits
Bits
Bits
Bits
Bits
Bits
17
13
17
13
16
12
16
12
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
MSB
DB0 DB1 DB2 DB3 DB4 DB5 DB6 DB7 DB8 DB9 DB10 DB11 DB12 DB13 DB14 DB15 DB16
Sing MSB
LSB
LSB
LSB
LSB
with A/DIN1 tied to MUXOUT1 and A/DIN2 tied
X
+
−
+
0
Analog Channel Addressed and Assignment
10
−
+
+
X
1
1
0
1
1
+
−
+
10
X
2
2
0
9
2
2
to MUXOUT2
−
+
+
TABLE 2. ADC12138 Multiplexer Addressing
X
9
3
3
0
8
3
3
+
−
+
MSB
Sign MSB
8
4
4
7
4
4
TABLE 1. Data Out Formats
−
+
+
10
7
5
5
6
5
5
+
−
+
10
6
6
6
9
5
6
6
−
+
+
26
9
5
7
7
8
4
7
7
−
−
−
−
−
−
−
−
8
4
8
8
7
3
8
8
Assignment
+
+
+
+
−
−
−
−
+
+
+
+
+
+
+
+
A/D Input
Polarity
7
3
9
9
6
2
9
9
10
10
10
10
6
2
5
1
−
−
−
−
+
+
+
+
−
−
−
−
−
−
−
−
MSB Sign
MSB Sign
MSB
MSB
LSB
5
1
4
Multiplexer Output
CH0
CH2
CH4
CH6
CH0
CH2
CH4
CH6
CH0
CH2
CH4
CH6
CH1
CH3
CH5
CH7
Assignment
LSB
Channel
4
3
0
X
3
2
0
COM
COM
COM
COM
COM
COM
COM
COM
CH1
CH3
CH5
CH7
CH1
CH3
CH5
CH7
2
X
1
0
Single-Ended
Differential
LSB
X
Mode
1
0
LSB
X