AD590
The inhibit input on the multiplexer turns all sensors off for
minimum dissipation while idling.
the two-trim mode (see Figure 10 and Figure 11). Additional
AD590s and their associated resistors can be added to multiplex
up to eight channels of ±0.5°C absolute accuracy over the
temperature range of −55°C to +125°C. The high temperature
restriction of 125°C is due to the output range of the op amps;
output to 150°C can be achieved by using a 20 V supply for the
op amp.
10V
16
3
14
2
0
1
2
+
+
+
–
–
22
–
12
02 +
–
+
–
21
–
11
01 +
–
+
+
–
20
–
10
+
ROW
SELECT
4028
CMOS
BCD-TO-
DECIMAL
11 DECODER
12
13
10
8
10V
16
9
10
11
6
AD590
00
2
15
1
14
0
13
COLUMN
SELECT
INHIBIT
LOGIC
LEVEL
INTERFACE
BINARY TO 1-OF-8 DECODER
7
8
4051 CMOS ANALOG
MULTIPLEXER
Figure 22. Matrix Multiplexer
+15V
+
35.7kΩ
35.7kΩ
2kΩ
2kΩ
5kΩ
5kΩ
97.6kΩ
97.6kΩ
V+
AD581
–
V
OUT
S1
S2
DECODER/
DRIVER
S8
AD707A
10mV/°C
27kΩ
–15V
+15V
–15V
AD7501
TTL/DTL TO CMOS
INTERFACE
+
+
–
EN
AD590L
–
AD590L
–5V TO –15V
Figure 23. 8-Channel Multiplexer
Rev. C | Page 12 of 16
00533-C-023
BINARY
CHANNEL
SELECT
00533-C-022
10kΩ 10mV/°C
AD [ ANALOG DEVICES ]
