AD7416-7418 Analog Devices, AD7416-7418 Datasheet - Page 15

• Manufacturer Part Number: AD7416-7418
• Description: 10-Bit Digital Temperature Sensor (AD7416) and Single/Four-Channel ADC (AD7417/AD7418)
• Manufacturer: Analog Devices

THERMOSTAT
Figure 14 shows the AD7416 used as a thermostat. The heater
will be switched on when the temperature falls below T
and switched off again when the temperature rises above T
For this application, the OTI output should be programmed
active low, and for comparator mode.
REV. B
3V TO 5.5V
+V
S
3V TO 5.5V
AD7416
Figure 14. AD7416 Used as a Thermostat
+V
S
R1
10k
R1
10k
RELAY
Figure 15. Multiple Connection of AD7416s to a Single Serial Bus
Q1
2N3904
OR SIMILAR
D1
1N4001
HEATER
RLA1
HEATER
SUPPLY
HYST
OS
,
.
–15–
SYSTEM WITH MULTIPLE AD7416s
The three LSBs of the AD7416’s serial address can be set by
the user, allowing eight different addresses from 1001000 to
1001111. Figure 15 shows a system in which eight AD7416s are
connected to a single serial bus, with their OTI outputs wire
ANDed together to form a common interrupt line. This ar-
rangement does mean that each device must be read to deter-
mine which one has generated the interrupt, and if a unique
interrupt is required for each device, the OTI outputs can be
connected separately to the I/O chip.
AD7416/AD7417/AD7418