MAX1617 데이터 시트보기 (PDF) - Maxim Integrated

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MAX1617

Remote/Local Temperature Sensor with SMBus Serial Interface

Maxim Integrated 

MAX1617

Remote/Local Temperature Sensor

with SMBus Serial Interface

General Description

The MAX1617 is a precise digital thermometer that

reports the temperature of both a remote sensor and its

own package. The remote sensor is a diode-connected

transistor—typically a low-cost, easily mounted 2N3904

NPN type—that replaces conventional thermistors or

thermocouples. Remote accuracy is ±3°C for multiple

transistor manufacturers, with no calibration needed. The

remote channel can also measure the die temperature of

other ICs, such as microprocessors, that contain an on-

chip, diode-connected transistor.

The 2-wire serial interface accepts standard System

Management Bus (SMBus) Write Byte, Read Byte, Send

Byte, and Receive Byte commands to program the alarm

thresholds and to read temperature data. The data format

is 7 bits plus sign, with each bit corresponding to 1°C, in

twos-complement format. Measurements can be done

automatically and autonomously, with the conversion rate

programmed by the user or programmed to operate in a

single-shot mode. The adjustable rate allows the user to

control the supply-current drain.

The MAX1617 is available in a small, 16-pin QSOP

surface-mount package.

Applications

●● Desktop and Notebook

Computers

●● Smart Battery Packs

●● LAN Servers

●● Industrial Controls

●● Central Office

Telecom Equipment

●● Test and Measurement

●● Multi-Chip Modules

Pin Configuration

TOP VIEW

N.C. 1

VCC 2

DXP 3

DXN 4

N.C. 5

ADD1 6

GND 7

GND 8

+

MAX1617

16 N.C.

15 STBY

14 SMBCLK

13 N.C.

12 SMBDATA

11 ALERT

10 ADD0

9 N.C.

QSOP

Features

●● Two Channels: Measures Both Remote and Local

Temperatures

●● No Calibration Required

●● SMBus 2-Wire Serial Interface

●● Programmable Under/Overtemperature Alarms

●● Supports SMBus Alert Response

●● Accuracy:

• ±2°C (+60°C to +100°C, local)

• ±3°C (-40°C to +125°C, local)

• ±3°C (+60°C to +100°C, remote)

●● 3μA (typ) Standby Supply Current

●● 70μA (max) Supply Current in Auto-Convert Mode

●● +3V to +5.5V Supply Range

●● Small, 16-Pin QSOP Package

Ordering Information

PART

TEMP. RANGE

MAX1617MEE+ -55°C to +125°C

+Denotes a lead-free package.

PIN-PACKAGE

16 QSOP

Typical Operating Circuit

0.1µF

3V TO 5.5V

2N3904

VCC STBY

MAX1617

DXP

SMBCLK

SMBDATA

DXN

2200pF

ALERT

ADD0 ADD1 GND

10k EACH

CLOCK

DATA

INTERRUPT

TO µC

19-1265; Rev 3; 11/16

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