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ADT6501 Datasheet(PDF) 9 Page - Analog Devices

Part No. ADT6501
Description  Low Cost, 2.7 V to 5.5 V, Micropower Temperature Switches in SOT-23
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Maker  AD [Analog Devices]
Homepage  http://www.analog.com
Logo AD - Analog Devices

ADT6501 Datasheet(HTML) 9 Page - Analog Devices

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


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