Datasheet > MAX6646_1207

MAX6646_1207

更新时间： 2024-11-06 12:10:19

品牌	Logo	应用领域
美信 - MAXIM		传感器
页数	文件大小	规格书
16页	320K
描述
145Â°C Precision SMBus-Compatible Remote/ Local Sensors with Overtemperature Alarms

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MAX6646_1207 数据手册

±9-254ꢂ; Rev 4; 7/±2

+145°C Precision SMBus-Compatible Remote/

Local Sensors with Overtemperature Alarms

7/MAX649

General Description

Features

The MAX6646/MAX6647/MAX6649 are precise, two-

channel digital temperature sensors. The devices accu-

rately measure the temperature of their own die and a

remote PN junction, and report the temperature in digital

form using a 2-wire serial interface. The remote PN junc-

tion is typically the emitter-base junction of a common-

collector PNP on a CPU, FPGA, or ASIC.

♦ Dual Channel: Measures Remote and Local

Temperature

♦ 0.125°C Resolution

♦ High Accuracy 1°C ꢀmaꢁx ꢂrom ꢃ+0°C to ꢃ1ꢄ5°C

ꢀRemotex, and 2°C ꢀmaꢁx ꢂrom ꢃ+0°C to ꢃ100°C

ꢀLocalx

The 2-wire serial interface accepts standard system man-

agement bus (SMBus) write byte, read byte, send byte,

and receive byte commands to read the temperature

data and to program the alarm thresholds. To enhance

system reliability, the MAX6646/MAX6647/MAX6649

include an SMBus timeout. A fault queue prevents the

ALERT and OVERT outputs from setting until a fault has

been detected one, two, or three consecutive times

(programmable).

♦ Measures High-Ideality Thermal Diodes Up to

ꢃ170°C ꢀApparentx

ꢃ1ꢄ5°C ꢀRealx

♦ Two Alarm Outputs: ALERT and OVERT

♦ Programmable Under/Overtemperature Alarm

Temperature Thresholds

♦ Programmable Conversion Rate

♦ SMBus-Compatible Interꢂace

♦ SMBus Timeout

The MAX6646/MAX6647/MAX6649 provide two system

alarms: ALERT and OVERT. ALERT asserts when any of

four temperature conditions are violated: local overtem-

perature, remote overtemperature, local undertempera-

ture, or remote undertemperature. OVERT asserts when

the temperature rises above the value in either of the two

OVERT limit registers. The OVERT output can be used to

activate a cooling fan, or to trigger a system shutdown.

Ordering Information

TEMP

RANGE PACKAGE

PIN-

MEASURED

TEMP RANGE

PART

Measurements can be done autonomously, at the pro-

grammed conversion rate, or in a single-shot mode. The

adjustable conversion rate allows optimizing supply cur-

rent and temperature update rate to match system needs.

-55°C to

8 μMAX

+125°C

MAX6646MUA+

MAX6647MUA+

MAX6649MUA+

0°C to +145°C

-55°C to

8 μMAX

+125°C

Remote accuracy is ±±1C maꢀimum error between ꢁ6ꢂ1C

and ꢁ±451C with no calibration needed. The MAX6646/

MAX6647/MAX6649 operate from -551C to ꢁ±251C, and

measure temperatures between ꢂ1C and ꢁ±451C. The

MAX6646/MAX6647/MAX6649 are available in an 8-pin

μMAX^®package.

-55°C to

8 μMAX

+125°C

ꢁDenotes a lead(Pb)-free/RoHS-compliant package.

Typical Operating Circuit

Applications

3.3V

Graphics Processors

Desktop Computers

Notebook Computers

Servers

Thin Clients

0.1μF

200Ω

Workstations

10kΩ EACH

Test and Measurement

Multichip Modules

MAX6646

MAX6647

MAX6649

DXP

DATA

SDA

CLOCK

SCLK

Selector Guide, Pin Conꢂigurations, and Functional Diagram

appear at end oꢂ data sheet.

ALERT

INTERRUPT TO μP

DXN

2200pF

OVERT

TO FAN DRIVER OR

SYSTEM SHUTDOWN

GND

μP

μMAX is a registered trademark of Maꢀim Integrated Products, Inc.

For pricing, delivery, and ordering inꢂormation, please contact Maꢁim Direct

at 1-888-+29-ꢄ+ꢄ2, or visit Maꢁim’s website at www.maꢁim-ic.com.

12 3 4 5 6 7...16

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与MAX6646_1207相关器件

型号	品牌	获取价格	描述	数据表
MAX6646MUA	MAXIM	获取价格	+145∑C Precision SMBus-Compatible Remote/ Loc
MAX6646MUA+	MAXIM	获取价格	145Â°C Precision SMBus-Compatible Remote/ Loc
MAX6646MUA+T	MAXIM	获取价格	Analog Circuit, 1 Func, BICMOS, PDSO8, 3 X 3 MM, ROHS COMPLIANT, MO-187CAA, MICRO, SOP-8
MAX6646YMUA+T	MAXIM	获取价格	Analog Circuit, 1 Func, BICMOS, PDSO8, 3 X 3 MM, ROHS COMPLIANT, MO-187CAA, MICRO, SOP-8
MAX6647	MAXIM	获取价格	+145∑C Precision SMBus-Compatible Remote/ Loc
MAX6647	ADI	获取价格	+145°C、高精度、SMBus兼容、远端/本地传感器，带有过温报警
MAX6647MUA	MAXIM	获取价格	+145∑C Precision SMBus-Compatible Remote/ Loc
MAX6647MUA+	MAXIM	获取价格	145Â°C Precision SMBus-Compatible Remote/ Loc
MAX6647MUA-T	MAXIM	获取价格	Analog Circuit, 1 Func, BICMOS, PDSO8, 3 X 3 MM, MO-187CAA, MICRO, SOP-8
MAX6647YMUA+	MAXIM	获取价格	Analog Circuit, 1 Func, BICMOS, ROHS COMPLIANT, MO-187C-AA, MICRO MAX PACKAGE-8

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