ADT6501ARJP045 AD [Analog Devices], ADT6501ARJP045 Datasheet - Page 9

• Manufacturer Part Number: ADT6501ARJP045
• Description: Low Cost, 2.7 V to 5.5 V, Micropower Temperature Switches in SOT-23
• Manufacturer: AD [Analog Devices]

Preliminary Technical Data
FUNCTIONAL DESCRIPTION
The conversion clock for the part is generated internally. No
external clock is required. The internal clock oscillator runs an
automatic conversion sequence. During this automatic
conversion sequence, a conversion is initiated every 600 ms. At
this time, the part powers up its analog circuitry and performs a
temperature conversion.
This temperature conversion typically takes 30 ms, after which
time the analog circuitry of the part automatically shuts down.
The analog circuitry powers up again 570 ms later, when the
600 ms timer times out and the next conversion begins. The
result of the most recent temperature conversion is compared
with the factory set trip point value. If the temperature
measured is greater than the trip point value, the output is
activated. The output is deactivated once the temperature
crosses back over the trip point threshold plus whatever
temperature hysteresis is selected. Figure 15 to Figure 18 show
the transfer function for the output trip pin of each generic
model.
TOVER
V
Figure 15. ADT6501 TOVER Transfer Function
COLD
HYST
10°C
HYST
2°C
TTH
HOT
TEMP
Rev. PrA | Page 9 of 16
TOVER
ADT6501/ADT6502/ADT6503/ADT6504
TUNDER
V
TUNDER
COLD
Figure 17. ADT6503 TUNDER Transfer Function
Figure 18. ADT6504 TUNDER Transfer Function
HYST
10°C
Figure 16. ADT6502 TOVER Transfer Function
V
V
COLD
COLD
HYST
TTH
2°C
TTH
TTH
HYST
2°C
HYST
2°C
HYST
10°C
HOT
HYST
10°C
HOT
HOT
TEMP
TEMP
TEMP