ADT14GS

更新时间： 2024-11-22 22:05:23

品牌	Logo	应用领域
亚德诺 - ADI		传感器换能器输出元件监控
页数	文件大小	规格书
16页	340K
描述
Quad Setpoint, Programmable Temperature Monitor and Controller

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ADT14GS 数据手册

Quad Setpoint, Programmable

Temperature Monitor and Controller

ADT14

FEATURES

FUNCTIONAL BLOCK DIAGRAM

Four Programmable Temperature Setpoints

Programmable Thermal Hysteresis

Accuracy ؎3؇C Typ from –40؇C to +125؇C

Temperature Output Scale Factor = 5 mV/K

Resistor Programmable Temperature Setpoints

5 mA Open-Collector Setpoint Outputs

Internal 2.5 V Reference

2.5V

HYSTERESIS

REF

SETPOINT

OUTPUT 1

SET 1

CURRENT

MIRROR

SETPOINT

OUTPUT 2

600 ␮A Max Quiescent Current at +5 V

SET 2

APPLICATIONS

Power Supply Monitor and Control System

Multiple Fan Controller System

Workstation Thermal Management System

SETPOINT

OUTPUT 3

SET 3

WINDOW

COMPARATORS

SETPOINT

OUTPUT 4

SET 4

GENERAL DESCRIPTION

The ADT14 is a temperature sensor and controller that generates

an output voltage proportional to temperature and provides four

temperature trip points. The four trip points, or temperature

setpoints, and their hysteresis are determined by voltage levels set

by the user. An on-chip voltage reference provides an easy method

for setting the temperature trip points.

HYSTERESIS

VOLTAGE

REFERENCE

AND

V+

VPTAT

SENSOR

TEMPERATURE

OUTPUT

ADT14

GND

The ADT14 consists of a bandgap voltage reference combined

with four matched comparators. The reference provides both a

temperature-stable 2.5 V output, and a voltage proportional to

absolute temperature (VPTAT) which has a precise temperature

coefficient of 5 mV/K = 5 mV/(°C +273.15). The VPTAT out-

put is nominally 1.49 V at +25°C. The comparators determine

whether the VPTAT output is above the voltages set up by

external resistive dividers (temperature trip points) and generate

an open-collector output signal when one of their respective

thresholds has been exceeded.

PIN CONFIGURATIONS

DIP & SO

OUTPUT 1

SETPOINT 1

OUTPUT 4

SETPOINT 4

2.5V REFERENCE

V+

ADT14

TOP VIEW

(Not to Scale)

GROUND

VPTAT

Hysteresis is programmed by a user-selected voltage at the hys-

teresis pin. This voltage adjusts the hysteresis current which is

used to generate a hysteresis offset voltage. The comparator’s

noninverting inputs are connected in parallel, which guarantees

that there is no hysteresis overlap and eliminates erratic transi-

tions between adjacent trip zones.

HYSTERESIS

SETPOINT 3

OUTPUT 3

SETPOINT 2

OUTPUT 2

NC = NO CONNECT

Using a proprietary thin-film resistor process in conjunction

with production laser trimming, a temperature accuracy of ±3°C

at 25°C is guaranteed. The open-collector outputs are capable

of sinking 5 mA, and provide TTL/CMOS logic compatibility

with an external pull-up resistor. Operating from a single 5 V

supply, the quiescent current is 600 µA max.

The ADT14 is available in the 16-lead epoxy DIP and SO

(small outline) packages.

REV. 0

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

which may result from its use. No license is granted by implication or

otherwise under any patent or patent rights of Analog Devices.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 617/329-4700

Fax: 617/326-8703

World Wide Web Site: http://www.analog.com

12 3 4 5 6 7...16

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ADT14GS 替代型号

型号	品牌	替代类型	描述	数据表
ADT70GR-REEL	ADI	功能相似	Analog Temperature Sensor, ANALOG TEMP SENSOR-VOLTAGE, 2.5V, RECTANGULAR, THROUGH HOLE MOU
ADT70GR	ADI	功能相似	PRTD Conditioning Circuit and Temperature Controller

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