Rainbow-electronics MAX7502 User Manual download pdf

General Description

The MAX7500/MAX7501/MAX7502 temperature sen-

sors accurately measure temperature and provide an

over-temperature alarm/interrupt/shutdown output.

These devices convert the temperature measurements

to digital form using a high-resolution, sigma-delta, ana-

log-to-digital converter (ADC). Communication is

through an I

C-compatible 2-wire serial interface. The

MAX7500/MAX7501/MAX7502 integrate a timeout fea-

ture that offers protection against I

C bus lockups.

The 2-wire serial interface accepts standard write byte,

read byte, send byte, and receive byte commands to

read the temperature data and configure the behavior

of the open-drain over-temperature shutdown output.

The MAX7500 features three address select lines, while

the MAX7501 and MAX7502 feature two address select

lines and a RESET input. The MAX7500/MAX7501/

MAX7502s’ 3.0V to 5.5V supply voltage range, low

250µA supply current, and a lockup-protected I

C-

compatible interface make them ideal for a wide range

of applications, including personal computers (PCs),

electronic test equipment, and office electronics.

The MAX7500/MAX7501/MAX7502 are available in 8-

pin µMAX

and SO packages and operate over the

-55°C to +125°C temperature range.

Applications

PCs

Servers

Office Electronics

Electronic Test Equipment

Industrial Process Control

Features

♦ Timeout Prevents Bus Lockup

♦ I

C Bus Interface

♦ 3.0V to 5.5V Supply Voltage Range

♦ 250µA (typ) Operating Supply Current

♦ 3µA (typ) Shutdown Supply Current

♦ ±2°C (max) from -25°C to +100°C Temperature

Accuracy

♦ µMAX, SO Packages Save Space

♦ Separate Open-Drain OS Output Operates as

Interrupt or Comparator/Thermostat Input

♦ Register Readback Capability

♦ Improved LM75 Second Source

MAX7500/MAX7501/MAX7502

Digital Temperature Sensors and Thermal

Watchdog with Bus Lockup Protection

________________________________________________________________ Maxim Integrated Products 1

A2GND

SCL

SDA

MAX7500

µMAX, SO

RESETGND

SCL

SDA

MAX7501

MAX7502

µMAX, SO

TOP VIEW

Pin Configurations

Ordering Information

19-3382; Rev 0; 8/04

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.

PART TEMP RANGE PIN-PACKAGE

MAX7500MSA -55°C to +125°C 8 SO

MAX7500MUA -55°C to +125°C 8 µMAX

MAX7501MSA* -55°C to +125°C 8 SO

MAX7501MUA* -55°C to +125°C 8 µMAX

MAX7502MSA* -55°C to +125°C 8 SO

MAX7502MUA* -55°C to +125°C 8 µMAX

Purchase of I

C components of Maxim Integrated Products

Inc., or one of its sublicensed Associated Companies, conveys

a license under Philips I

C Patent Rights to use these compo-

nents in an I

C system, provided that the system conforms to

the I

C Standard Specification as defined by Philips.

*Future product—contact factory for availability.

C is a trademark of Philips Corp.

µMAX is a registered trademark of Maxim Integrated

Products, Inc.

1 2 3 4 5 6 ... 12 13

MAX7500/MAX7501/MAX7502 1

Summary of Contents

Page 1 - MAX7500/MAX7501/MAX7502

General DescriptionThe MAX7500/MAX7501/MAX7502 temperature sen-sors accurately measure temperature and provide anover-temperature alarm/interrupt/shut

Page 2

MAX7500/MAX7501/MAX7502ShutdownSet bit D0 in the configuration register to 1 to place theMAX7500/MAX7501/MAX7502 in shutdown mode andreduce supply cur

Page 3

Applications InformationDigital NoiseThe MAX7500/MAX7501/MAX7502 feature an integrat-ed lowpass filter on both the SCL and the SDA digitallines to mit

Page 4

MAX7500/MAX7501/MAX7502Digital Temperature Sensors and ThermalWatchdog with Bus Lockup Protection12 __________________________________________________

Page 5

MAX7500/MAX7501/MAX7502Digital Temperature Sensors and ThermalWatchdog with Bus Lockup ProtectionMaxim cannot assume responsibility for use of any cir

Page 6

MAX7500/MAX7501/MAX7502Digital Temperature Sensors and ThermalWatchdog with Bus Lockup Protection2 ___________________________________________________

Page 7

MAX7500/MAX7501/MAX7502Digital Temperature Sensors and ThermalWatchdog with Bus Lockup Protection_____________________________________________________

Page 8

MAX7500/MAX7501/MAX7502Digital Temperature Sensors and ThermalWatchdog with Bus Lockup Protection4 ___________________________________________________

Page 9

MAX7500/MAX7501/MAX7502Digital Temperature Sensors and ThermalWatchdog with Bus Lockup Protection_____________________________________________________

Page 10

MAX7500/MAX7501/MAX7502Digital Temperature Sensors and ThermalWatchdog with Bus Lockup Protection6 ___________________________________________________

Page 11

MAX7500/MAX7501/MAX7502Digital Temperature Sensors and ThermalWatchdog with Bus Lockup Protection_____________________________________________________

Page 12

MAX7500/MAX7501/MAX7502Register DescriptionsThe MAX7500/MAX7501/MAX7502 have an internal pn-junction-based temperature sensor whose analog out-put is

Page 13

temperature rises above the TOSvalue. OS is deassert-ed when the temperature drops below the THYSTvalue.See Figure 4. Set bit D1 to 1 to run the over-

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Rainbow-electronics MAX7502 User Manual

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Summary of Contents

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