Datasheet > MAX31912

MAX31912

更新时间： 2024-11-25 14:58:07

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
18页	1122K
描述
八通道、工业数字输入电平转换器/串行器

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中文翻译

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MAX31912 数据手册

EVALUATION KIT AVAILABLE

MAX31912

Ultra-Low Power Industrial, Octal,

Digital Input Translator/Serializer

General Description

Beneﬁts and Features

The MAX31912 industrial interface serializer translates,

conditions, and serializes the 24V digital 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.

● Ultra-Low Power and Heat Dissipation

• Low Quiescent Current (1.6mA, typ)

• Highly Accurate and Stable Input Current Limiters,

Adjustable from 0.5mA to 6mA

• Special (Patent-Pending) Ultra-Low-Power Mode

with Switched Current Limiters

• Energy-Less Field-Side LED Drivers

● High Integration Reduces BOM Count, Board Size,

and System Cost

The device features integrated current limiting, lowpass

filtering, and channel serialization. Input current limiting

allows a significant reduction in power consumed from

the field voltage supply as compared to traditional dis-

crete resistor-divider implementations. Selectable on-chip

lowpass filters allow flexible debouncing and filtering of

sensor outputs based on the application.

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

• On-Chip 8-1 Serialization with SPI Interface,

• On-Chip 5V Regulator

• On-Chip Overtemperature Indicator

• Dual On-Chip Field Supply Voltage Monitors

• Integrated Debounce Filters, Selectable from 0 to 3ms

● Robust Features and Performance for Industrial

Environments

• Multibit CRC Code Generation and Transmission for

Error Detection and More Reliable Data Transmission

• High ESD Immunity on All Field Input Pins

● Accepts Industry Standard Input Types

• Conﬁgurable for IEC 61131-2 Input Types 1, 2, and 3

● Flexible Power Supply Capability Enables Usage in

5V, 12V, 24V, and Higher Voltage Systems

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

• Can Be Powered from the Logic-Side Using a 5V

Supply

On-chip serialization allows a drastic reduction in the

number of optocouplers used for isolation. The device

serializer is stackable so that any number of input channels

can be serialized and output through only one SPI-

compatible port. This reduces the number of optocouplers

needed to only three, regardless of the number of input

channels.

For enhanced robustness with respect to high-frequency

noise and fast electrical transients, a multibit CRC code

is generated and transmitted through the SPI port for

each 8 bits of data. The on-chip 5V voltage regulator can

be used to power external optocouplers, digital isolators, or

other external 5V circuitry. Field-side LED drivers recycle

the current from the eight inputs to provide visual input

status indication without any additional current or power

consumption.

Applications

● Digital Input Modules for PLCs

● Industrial, Building, and Process Automation

● Motor Control

The MAX31912 uses patent-pending circuit techniques

to achieve further reduction of power beyond what is

possible by input current limiting alone.

For low-cost applications, Maxim Integrated offers a pin-

compatible version of this device, the MAX31913, which

does not include the patent-pending current-switching

circuitry included in the MAX31912.

Ordering Information appears at end of data sheet.

19-6925; Rev 3; 4/15

12 3 4 5 6 7...18

中文翻译

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与MAX31912相关器件

型号	品牌	获取价格	描述	数据表
MAX31913	MAXIM	获取价格	Industrial, Octal, Digital Input Translator/Serializer
MAX31913	ADI	获取价格	八通道、工业数字输入电平转换器/串行器
MAX31914	ADI	获取价格	超低功耗、八通道、工业数字输入电平转换器
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

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