Datasheet > MAX31914

MAX31914

更新时间： 2024-11-25 14:58:23

品牌	Logo	应用领域
亚德诺 - ADI		转换器电平转换器
页数	文件大小	规格书
14页	604K
描述
超低功耗、八通道、工业数字输入电平转换器

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中文翻译

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MAX31914 数据手册

EVALUATION KIT AVAILABLE

MAX31914

Ultra-Low Power Industrial, Octal,

Digital Input Translator

General Description

Beneﬁts and Features

● Flexible Supply Options Enables Usage in 24V, 12V,

The MAX31914 translates and conditions the 24V digi-

tal output of sensors and switches used in industrial,

process, and building automation to 5V CMOS-compatible

signals required by microcontrollers. It provides the front-

end interface circuit of a programmable logic controller

(PLC) digital input module.

and 5V Supplied Systems

• 7V to 36V Wide Operating Field-Supply Range

• Device Can Be Optionally Powered from the Logic-

Side Using a 5V Supply

● Low Power and Low Heat Dissipation

• Very Low Quiescent Current

The signal voltage translation is performed in conjunction

with input current limiting and lowpass filtering. Input

current limiting allows a significant reduction in power

consumed from the field-supply voltage, as compared

to traditional discrete resistor-divider implementations.

To achieve the lowest in-class power dissipation, the IC

uses patent-pending circuit techniques to achieve further

reduction of power dissipation beyond what is possible

by input current limiting alone. This special low-power

operating mode is automatically activated when on-chip

lowpass filtering is selected.

• Extremely Accurate and Stable Input Current Limiters

• Special Ultra-Low-Power Operating Mode with

Switched Current Limiters

● Configurability Enables a Wide Range of Standard

and Custom Applications

• Conﬁgurable Inputs for IEC 61131-2 Input Types 1,

2, and 3 or for Standard CMOS Logic Levels

• 0.5mA to 6mA Conﬁgurable Input Current Limiting

• Selectable Input Filtering and Debounce: 0, 25µs,

0.75ms, and 3ms Settings

Selectable on-chip lowpass filters allow flexible debouncing

and filtering of sensor inputs based on the application.

When no filtering is selected, the IC is capable of detecting

pulses as short as 0.75µs at its field inputs.

● High Integration Reduces BOM Count and Board

Space

• 8 High-Voltage Input Channels (36V Max)

• 8 CMOS Logic Outputs for High-Speed Simultaneous

Transfer of All Input States to the Controller

• On-Chip 5V Regulator

• On-Chip Overtemperature Indicator

• On-Chip Field-Supply Voltage Monitor

• High HBM ESD Immunity on all Field Input Pins

(15kV HBM)

All 8 input channels are translated to CMOS logic levels and

presented in parallel on the eight output pins for direct or

galvanically isolated interface with a controller ASIC or

micro.

The on-chip 5V voltage regulator can be used to power

external optocouplers, digital isolators, or other external

5V circuitry.

For low-cost applications, Maxim Integrated offers a pin

compatible version of this device, the MAX31915, which

does not include the current-switching circuitry included

in the MAX31914.

Applications

● Digital Input Modules for Programmable

Ordering Information appears at end of data sheet.

Logic Controllers (PLCs)

● Industrial Automation, Building Automation

● Process Automation

19-7474; Rev 1; 4/15

12 3 4 5 6 7...14

中文翻译

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与MAX31914相关器件

型号	品牌	获取价格	描述	数据表
MAX31915	ADI	获取价格	八通道、工业数字输入电平转换器
MAX31915AUI+	MAXIM	获取价格	Interface Circuit, BICMOS, PDSO38, ROHS COMPLIANT, TSSOP-38
MAX31953	MAXIM	获取价格	Fully Assembled and Tested
MAX31953EVKIT	MAXIM	获取价格	Fully Assembled and Tested
MAX31963	MAXIM	获取价格	Fully Assembled and Tested
MAX319C/D	MAXIM	获取价格	Precision, CMOS Analog Switches
MAX319CJA	MAXIM	获取价格	Precision, CMOS Analog Switches
MAX319CPA	MAXIM	获取价格	Precision, CMOS Analog Switches
MAX319CPA	ROCHESTER	获取价格	1-CHANNEL, SGL POLE DOUBLE THROW SWITCH, PDIP8, 0.300 INCH, PLASTIC, DIP-8
MAX319CSA	MAXIM	获取价格	Precision, CMOS Analog Switches

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