AD590
Data Sheet
Figure 24 demonstrates a method of multiplexing the AD590 in
the 2-trim mode (see Figure 13 and Figure 14). 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.
2kΩ
2kΩ
5kΩ
35.7kΩ
35.7kΩ
97.6kΩ
97.6kΩ
+15V
+
5kΩ
AD581
–
V
OUT
V+
S1
S2
OP177
10mV/°C
DECODER/
DRIVER
–15V
27kΩ
S8
AD7501
+15V
–15V
TTL/DTL TO CMOS
INTERFACE
+
–
+
EN
BINARY
CHANNEL
SELECT
AD590L
AD590L
–
–5V TO –15V
Figure 24. 8-Channel Multiplexer
Rev. G | Page 12 of 16
ADI [ ADI ]
