AD590

Data Sheet

Rev. G | Page 12 of 16

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.

Figure 24. 8-Channel Multiplexer

–

+

AD590L

–

+

AD590L

DECODER/

DRIVER

S1

S2

S8

AD7501

–15V

+15V

TTL/DTL TO CMOS

INTERFACE

BINARY

CHANNEL

SELECT

EN

–15V

10mV/°C

V+

OP177

+15V

AD581

–

+

–5V TO –15V