ADT6501 Datasheet, PDF (9/16 Pages) Analog Devices – Low Cost, 2.7 V to 5.5 V, Micropower Temperature Switches in SOT-23

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.
V
TOVER
COLD
10°C
HYST
HOT
TTH
TEMP
2°C
HYST
Figure 15. ADT6501 ^TOVER Transfer Function
ADT6501/ADT6502/ADT6503/ADT6504
V
TOVER
COLD
HOT
10°C
HYST
TTH
2°C
HYST
TEMP
Figure 16. ADT6502 TOVER Transfer Function
V
TUNDER
COLD
HOT
TTH
2°C
HYST
10°C
HYST
TEMP
Figure 17. ADT6503 ^TUNDER Transfer Function
V
TUNDER
COLD
HOT
TTH
10°C
2°C ^HYST
HYST
TEMP
Figure 18. ADT6504 TUNDER Transfer Function
Rev. PrA | Page 9 of 16