Datasheet > TMP12FSZ

TMP12FSZ

更新时间： 2024-11-04 21:22:27

品牌	Logo	应用领域
亚德诺 - ADI		输出元件传感器换能器
页数	文件大小	规格书
12页	704K
描述
Analog Temperature Sensor, ANALOG TEMP SENSOR-VOLTAGE, 2.49-2.51V, 3Cel, RECTANGULAR, SURFACE MOUNT, SOIC-8

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TMP12FSZ 数据手册

Airflow and Temperature Sensor

TMP12

FUNCTIONAL BLOCK DIAGRAM

FEATURES

Temperature Sensor Includes 100 ꢀ Heater

Heater Provides Power IC Emulation

Accuracy ꢁ3 Typ from –40ꢂC to +100ꢂC

Operation to 150ꢂC

HYSTERESIS

TMP12

CURRENT

REF

V+

CURRENT

MIRROR

5 mV/ꢂC Internal Scale Factor

Resistor Programmable Temperature Setpoints

20 mA Open-Collector Setpoint Outputs

Programmable Thermal Hysteresis

Internal 2.5 V Reference

HYS

SET

OVER

HIGH

WINDOW

COMPARATOR

SET

LOW

UNDER

Single 5 V Operation

400 ꢃA Quiescent Current (Heater Off)

Minimal External Components

VOLTAGE

REFERENCE

AND

GND

HYSTERESIS

VOLTAGE

1kꢀ

APPLICATIONS

SENSOR

HEATER

System Airflow Sensor

100ꢀ

Equipment Overtemperature Sensor

Overtemperature Protection

Power Supply Thermal Sensor

Low Cost Fan Controller

PIN CONNECTION

8-Lead SOIC

GENERAL DESCRIPTION

The TMP12 is a silicon-based airflow and temperature sensor

designed to be placed in the same airstream as heat generating

components that require cooling. Fan cooling may be required

continuously or during peak power demands. For example, if

the cooling systems of a power supply fails, system reliability

and/or safety may be impaired. By monitoring temperature

while emulating a power IC, the TMP12 can provide a warning

of cooling system failure.

V+

REF

TMP12

TOP VIEW

(Not to Scale)

SET HIGH

SET LOW

GND

OVER

UNDER

HEATER

The TMP12 generates an internal voltage that is linearly propor-

tional to Celsius (Centigrade) temperature, nominally 5 mV/°C.

The linearized output is compared with voltages from an exter-

nal resistive divider connected to the TMP12’s 2.5 V precision

reference. The divider sets up one or two reference voltages, as

required by the user, providing one or two temperature setpoints.

Comparator outputs are open-collector transistors able to sink

over 20 mA. There is an on-board hysteresis generator provided

to speed up the temperature-setpoint output transitions; this

also reduces erratic output transitions in noisy environments.

Hysteresis is programmed by the external resistor chain and

is determined by the total current drawn from the 2.5 V reference.

The TMP12 airflow sensor also incorporates a precision, low

temperature coefficient 100 Ω heater resistor that may be con-

nected directly to an external 5 V supply. When the heater is

activated, it raises the die temperature approximately 20°C

above ambient (in still air). The purpose of the heater in the

TMP12 is to emulate a power IC, such as a regulator or Pentium^®

CPU, which has a high internal dissipation.

When subjected to a fast airflow, the package and die tempera-

tures of the power device and the TMP12 (if located in the

same airstream) will be reduced by an amount proportional to

the rate of airflow. The internal temperature rise of the TMP12

may be reduced by placing a resistor in series with the heater, or

by reducing the heater voltage.

The TMP12 is intended for single 5 V supply operation, but will

operate on a 12 V supply. The heater is designed to operate from

5 V only. Specified temperature range is from –40°C to +125°C,

and operation extends to 150°C at 5 V with reduced accuracy.

The TMP12 is available in 8-lead SOIC packages.

REV. B

Information furnished by Analog Devices is believed to be accurate and

reliable. However, no responsibility is assumed by Analog Devices for its

use, norforanyinfringementsofpatentsorotherrightsofthirdpartiesthat

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

under any patent or patent rights of Analog Devices. Trademarks and

registered trademarks are the property of their respective owners.

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

Tel: 781/329-4700

Fax: 781/326-8703

www.analog.com

12 3 4 5 6 7...12

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TMP12FSZ 替代型号

型号	品牌	替代类型	描述	数据表
TMP12FS-REEL	ADI	类似代替	Analog Temperature Sensor, ANALOG TEMP SENSOR-VOLTAGE, 2.49-2.51V, 3Cel, RECTANGULAR, SURF
TMP12FS	ADI	功能相似	Airflow and Temperature Sensor

与TMP12FSZ相关器件

型号	品牌	获取价格	描述	数据表
TMP12FSZ-REEL	ADI	获取价格	Analog Temperature Sensor, ANALOG TEMP SENSOR-VOLTAGE, 2.49-2.51V, 3Cel, RECTANGULAR, SURF
TMP12GBC	ADI	获取价格	Airflow and Temperature Sensor
TMP130	TRUMPOWER	获取价格	130 WATT MEDICAL POWER ADAPTERS
TMP130-05	TRUMPOWER	获取价格	130 WATT MEDICAL POWER ADAPTERS
TMP130-07	TRUMPOWER	获取价格	130 WATT MEDICAL POWER ADAPTERS
TMP130-10	TRUMPOWER	获取价格	130 WATT MEDICAL POWER ADAPTERS
TMP130-12	TRUMPOWER	获取价格	130 WATT MEDICAL POWER ADAPTERS
TMP130-15	TRUMPOWER	获取价格	130 WATT MEDICAL POWER ADAPTERS
TMP130-18	TRUMPOWER	获取价格	130 WATT MEDICAL POWER ADAPTERS
TMP130-24	TRUMPOWER	获取价格	130 WATT MEDICAL POWER ADAPTERS

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