ADT6402SRJZ-RL7【PDF 1/12 页】IC TEMP SENS TRIP PT PP SOT-23-6

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Sheet目录39

[1页]2页 3页 4页 5页

Low Cost, 2.7 V to 5.5 V, Pin-Selectable

Tem erature Switches in SOT-23

Data Sheet

ADT6401/ADT6402

Rev. C

Document Feedback

Information furnished by Analog Devices is believed to be accurate and reliable. However, no

responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other

rights of third parties that may result from its use. Specifications subject to change without notice. No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

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FEATURES

?.5癈 (typical) threshold accuracy

Pin-selectable trip points from

45癈 to +5癈 in 10癈 increments (undertemperature)

45癈 to 115癈 in 10癈 increments (overtemperature)

Maximum operating temperature of 125癈

Open-drain output (ADT6401)

Push-pull output (ADT6402)

Pin-selectable hysteresis of 2癈 and 10癈

Supply current of 30 礎 (typical)

Space-saving, 6-lead SOT-23 package

APPLICATIONS

Medical equipment

Automotive

Cell phones

Hard disk drives

Personal computers

Electronic test equipment

Domestic appliances

Process control

FUNCTIONAL BLOCK DIAGRAM

2篊/10篊

GND

TOVER/TUNDER

TRIP POINT AND

HYSTERESIS

DECODING

ADT6401

COMPARATOR

??/DIV>

TEMPERATURE-TO-

DIGITAL CONVERTER

Figure 1.

GENERAL DESCRIPTION

The ADT6401/ADT6402 are trip point temperature switches

available in a 6-lead SOT-23 package. Each part contains an

internal band gap temperature sensor for local temperature

sensing. When the temperature crosses the trip point setting,

the logic output is activated. The ADT6401 logic output is

active low and open-drain. The ADT6402 logic output is active

high and push-pull. The temperature is digitized to a resolution

of 0.125癈 (11-bit). The pin-selectable trip point settings are

10癈 apart starting from 45癈 to +5癈 for undertemperature

switching, and from 45癈 to 115癈 for overtemperature

switching.

These devices typically consume 30 糀 of supply current. Hystere-

sis is pin selectable at 2癈 and 10癈. The temperature switch is

specified to operate over the supply range of 2.7 V to 5.5 V.

When the ADT6401/ADT6402 are used for monitoring tempera-

tures from 45癈 to 115癈, the logic output pin becomes active

when the temperature goes higher than the selected trip point

temperature.

When the ADT6401/ADT6402 are used for monitoring tempera-

tures from 45癈 to +5癈, the logic output pin becomes active

when the temperature goes lower than the selected trip point

temperature.

PRODUCT HIGHLIGHTS

1. ??based temperature measurement gives high accuracy

and noise immunity.

2. Wide operating temperature range from 55癈 to +125癈.

3. ?.5癈 typical accuracy from 45癈 to +115癈.

4. Pin-selectable threshold settings from 45癈 to +115癈 in

10癈 increments.

5. Supply voltage is 2.7 V to 5.5 V.

6. Supply current of 30 糀.

7. Space-saving, 6-lead SOT-23 package.

8. Pin-selectable temperature hysteresis of 2癈 or 10癈.

9. Temperature resolution of 0.125癈.

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