Datasheet > MAX6691_07

MAX6691_07

更新时间： 2024-11-09 11:15:15

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美信 - MAXIM		转换器
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7页	121K
描述
Four-Channel Thermistor Temperature-to-Pulse-Width Converter

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MAX6691_07 数据手册

19-2304; Rev 1; 2/07

Four-Channel Thermistor Temperature-to-Pulse-

Width Converter

General Description

Features

The MAX6691 four-channel thermistor temperature-to-

pulse-width converter measures the temperatures of up

to four thermistors and converts them to a series of out-

put pulses whose widths are related to the thermistors’

temperatures. Each of the four thermistors and an

♦ Simple Single-Wire Interface

♦ Measures Up to Four Thermistor Temperatures

♦ Low-Average Thermistor Current Minimizes Self-

Heating Errors

external fixed resistor (R

) form a voltage-divider that

EXT

♦ Internal Voltage Reference Isolates Thermistor

is driven by the MAX6691’s internal voltage reference

(V ). V and the voltage across R are mea-

from Power-Supply Noise

REF

EXT

♦ Accommodates Any Thermistor Temperature

sured and converted to a pulse.

Range

The MAX6691 has a single open-drain I/O pin that can

be readily connected to a variety of microcontrollers.

The microcontroller initiates a conversion by pulling the

I/O pin low and releasing it. When conversion is done,

the MAX6691 signals the end of conversion by pulling

the I/O pin low once again. The pulse corresponding to

the first thermistor is sent immediately after the release

of the I/O pin.

The on-chip power-management circuitry reduces the

average thermistor current to minimize errors due to

thermistor self-heating. Between conversions, the

MAX6691 falls into a 10µA (max) sleep mode, where

the voltage reference is disabled and the supply cur-

rent is at its minimum.

Ordering Information

PIN-

PKG

PART

TEMP RANGE

PACKAGE

CODE

MAX6691MUB -55°C to +125°C

10 µMAX

U10-2

The MAX6691 is available in a 10-pin µMAX package

and is specified from -55°C to +125°C temperature

range.

Applications

HVAC

Home Appliances

Medical Devices

Typical Application Circuit

Pin Configuration

TOP VIEW

10kΩ

R-

I/O

MICRO-

CONTROLLER

I/O

MAX6691

N.C.

GND

N.C.

GND

R+

MAX6691

R-

R+

EXT

µMAX

________________________________________________________________ Maxim Integrated Products

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.

12 3 4 5 6 7

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与MAX6691_07相关器件

型号	品牌	获取价格	描述	数据表
MAX6691MUB	MAXIM	获取价格	Four-Channel Thermistor Temperature-to-Pulse- Width Converter
MAX6691MUB+	MAXIM	获取价格	Analog Circuit, 1 Func, BICMOS, PDSO10, MICRO MAX PACKAGE-10
MAX6691MUB+T	MAXIM	获取价格	暂无描述
MAX6692	MAXIM	获取价格	Precision SMBus-Compatible Remote/Local Temperature Sensors with Overtemperature Alarms
MAX6692	ADI	获取价格	高精度、SMBus兼容、远端/本地温度传感器，带有高温报警
MAX6692EVKIT	MAXIM	获取价格	Evaluation System/Evaluation Kit for the MAX6648/MAX6649/MAX6692
MAX6692EVSYS	MAXIM	获取价格	Evaluation System/Evaluation Kit for the MAX6648/MAX6649/MAX6692
MAX6692MSA	MAXIM	获取价格	Precision SMBus-Compatible Remote/Local Temperature Sensors with Overtemperature Alarms
MAX6692MSA+	MAXIM	获取价格	Serial Switch/Digital Sensor, 10 Bit(s), 0.80Cel, BICMOS, Rectangular, 8 Pin, Surface Moun
MAX6692MSA-T	MAXIM	获取价格	Serial Switch/Digital Sensor, 10 Bit(s), 0.80Cel, BICMOS, Rectangular, 8 Pin, Surface Moun

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