Datasheet > LM74A-3MDA

LM74A-3MDA

更新时间： 2024-09-12 21:54:15

品牌	Logo	应用领域
美国国家半导体 - NSC		传感器温度传感器
页数	文件大小	规格书
12页	603K
描述
SPI/MICROWIRE 12-Bit Plus Sign Temperature Sensor (LM74 in Die Form)

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LM74A-3MDA 数据手册

November 2004

LM74A

™

SPI/MICROWIRE 12-Bit Plus Sign Temperature Sensor

(LM74 in Die Form)

General Description

Applications

n System Thermal Management

n Personal Computers

n Disk Drives

n Office Electronics

n Electronic Test Equipment

The LM74A is a temperature sensor, Delta-Sigma analog-to-

digital converter with an SPI and MICROWIRE compatible

interface in die form. The host can query the LM74A at any

time to read temperature. A shutdown mode decreases

power consumption to less than 10 µA. This mode is useful

in systems where low average power consumption is critical.

This particular data sheet applies to the LM74 in die form.

The LM74 is available in the SO-8 package as well as an

5-Bump micro SMD package please refer to LM74 data

sheet for detailed specifictions pertaining to the packaged

parts.

Features

n 0.0625˚C temperature resolution.

n Shutdown mode conserves power between temperature

reading

n SPI and MICROWIRE Bus interface

n LM74 is also available in a 5-Bump micro SMD and

8-pin MSOP

The LM74A has 12-bit plus sign temperature resolution

(0.0625˚C per LSB) while operating over a temperature

range of −40˚C to +150˚C. The LM74A-5 MDA accuracy of

3.5˚C is specified over a temperature range of 0˚C to

+150˚C.

Key Specifications

The LM74A’s 4.5V to 5.5V or 3.0V to 3.6V supply voltage

range, low supply current and simple SPI interface make it

ideal for a wide range of applications. These include thermal

management and protection applications in hard disk drives,

printers, electronic test equipment, and office electronics.

Supply Voltage LM74A-5

4.5V to 5.5V

3.0V to 3.6V

310µA (typ)

520µA (max)

8µA (typ)

LM74A-3

Supply Current

operating

shutdown

LM74A-5 MDA

Temperature

Accuracy

0˚C to 140˚C

3.0˚C(max)

140˚C to 150˚C

3.5˚C(max)

Simplified Block Diagram

20017701

™

MICROWIRE is a trademark of National Semiconductor Corporation.

TRI-STATE^®is a registered trademark of National Semiconductor Corporation.

DS200177

www.national.com

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