Rainbow-electronics MAX1618 Uživatelský manuál stáhnout pdf

________________General Description

The MAX1618 precise digital thermometer reports the

temperature of a remote sensor. 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 MAX1618 can also measure the die temper-

ature 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

two’s complement format. Measurements can be done

automatically and autonomously, with the 16Hz conversion

rate or programmed to operate in a single-shot mode.

The thermostat mode configures the ALERT output as an

interrupt or as a temperature reset that remains active only

while the temperature is above the maximum temperature

limit or below the minimum temperature limit. The ALERT

output polarity in thermostat mode can be configured for

active high or active low. Fan control is implemented using

this ALERT output.

The MAX1618 is available in a small (1.1mm high) 10-pin

µMAX package.

________________________Applications

Desktop and Notebook Central Office

Computers Telecom Equipment

Smart Battery Packs Test and Measurement

LAN Servers Multichip Modules

Industrial Controls

____________________________Features

♦ Single Channel: Measures Remote CPU

Temperature

♦ No Calibration Required

♦ SMBus 2-Wire Serial Interface

♦ Programmable Under/Overtemperature Alarms

♦ Overtemperature Output for Fan Control

(Thermostat Mode)

♦ Supports SMBus Alert Response Accuracy

±3°C (+60°C to +100°C)

±5°C (-55°C to +120°C)

♦ 3µA (typ) Standby Supply Current

♦ 900µA (max) Supply Current in Autoconvert Mode

♦ +3V to +5.5V Supply Range

♦ Small 10-Pin µMAX Package

MAX1618

†

Remote Temperature Sensor

with SMBus Serial Interface

________________________________________________________________ Maxim Integrated Products 1

MAX1618

SMBCLK

ADD0 ADD1

STBY

GND

ALERT

SMBDATA

DXP

DXN

INTERRUPT

TO µC

3V TO 5.5V

200Ω

0.1µF

CLOCK

10k EACH

DATA

2N3904

2200pF

___________________Pin Configuration

ALERT

SMBDATA

SMBCLK

STBYDXN

GND

ADD1

ADD0

MAX1618

µMAX

TOP VIEW

DXP

Typical Operating Circuit

19-1495; Rev 1; 12/99

PART

MAX1618MUB -55°C to +125°C

TEMP. RANGE PIN-PACKAGE

10 µMAX

Ordering Information

SMBus is a trademark of Intel Corp.

†Patents Pending

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

1 2 3 4 5 6 ... 17 18

Remote Temperature Sensor 1

Shrnutí obsahu

Strany 1 - Remote Temperature Sensor

________________General DescriptionThe MAX1618 precise digital thermometer reports thetemperature of a remote sensor. The remote sensor is adiode-conn

Strany 2

above VCC- 1V (typ) or below VDXN+ 50mv (typ), afault is detected and ALERT is asserted. ADC reads+127°C. Also, if the ADC has an extremely low differ

Strany 3

MAX1618Remote Temperature Sensor with SMBus Serial Interface______________________________________________________________________________________ 11R

Strany 4

Slave AddressesThe device address can be set to one of nine differentvalues by pin-strapping ADD0 and ADD1 so more thanone MAX1618 can reside on the s

Strany 5

introduces errors due to the rise time of the switched-current source.PC Board Layout1) Place the MAX1618 as close as practical to theremote diode. In

Strany 6

MAX1618Remote Temperature Sensor with SMBus Serial Interface14 ______________________________________________________________________________________6

Strany 7

MAX1618Remote Temperature Sensor with SMBus Serial Interface______________________________________________________________________________________ 15/

Strany 8

MAX1618Remote Temperature Sensor with SMBus Serial Interface16 ______________________________________________________________________________________i

Strany 9

MAX1618Remote Temperature Sensor with SMBus Serial Interface______________________________________________________________________________________ 17i

Strany 10

MAX1618Remote Temperature Sensor with SMBus Serial InterfaceMaxim cannot assume responsibility for use of any circuitry other than circuitry entirely

Strany 11

Autoconvertmode, averageMAX1618Remote Temperature Sensor with SMBus Serial Interface2 ________________________________________________________________

Strany 12

MAX1618Remote Temperature Sensor with SMBus Serial Interface_______________________________________________________________________________________ 3E

Strany 13

40-401 100TEMPERATURE ERRORvs. LEAKAGE RESISTANCE-20-30-100102030MAX1618 toc01LEAKAGE RESISTANCE (MΩ)TEMPERATURE ERROR (°C)10PATH = DXP TO GND AND CON

Strany 14

MAX1618Remote Temperature Sensor with SMBus Serial Interface_______________________________________________________________________________________ 51

Strany 15

MAX1618Remote Temperature Sensor with SMBus Serial Interface6 _______________________________________________________________________________________P

Strany 16

MAX1618Remote Temperature Sensor with SMBus Serial Interface_______________________________________________________________________________________ 7F

Strany 17

Low-Power Standby ModeStandby mode disables the ADC and reduces the sup-ply-current drain to 3µA (typ). Enter standby mode byforcing the STBY pin low

Strany 18

and does not go inactive until the temperature dropsbelow TLOW. Enable thermostat mode through the configuration reg-ister (Table 4), with one bit to

Komentáře k této Příručce

Žádné komentáře

Rainbow-electronics MAX1618 Uživatelský manuál

Procházejte online nebo si stáhněte Uživatelský manuál pro Senzory Rainbow-electronics MAX1618. Rainbow Electronics MAX1618 User Manual Uživatelská příručka

Shrnutí obsahu

Komentáře k této Příručce

Související produkty a manuály pro Senzory Rainbow-electronics MAX1618