Datasheet > MAX14890E

MAX14890E

更新时间： 2024-09-14 14:57:51

品牌	Logo	应用领域
亚德诺 - ADI		编码器
页数	文件大小	规格书
30页	986K
描述
增量式编码器接口，适用于RS-422、HTL和TTL，带数字输入

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中文翻译

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MAX14890E 数据手册

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MAX14890E

Incremental Encoder Interface for RS-422,

HTL, and TTL with Digital Inputs

General Description

The MAX14890E incremental encoder receiver contains

four differential receivers and two single-ended receivers.

Beneﬁts and Features

● High Flexibility Supports All Encoder Types

• Selectable RS-422/HTL/TTL/DI Receivers

• RS-422 Switching Rates Up to 35Mbps

• TTL Switching Rates Up to 5MHz

The differential receivers can be operated in RS-422 or

differential high-threshold logic (HTL) modes and are

optionally configurable for single-ended TTL/HTL operation.

The MAX14890E features a wide common mode input

range of -20V to +20V in RS-422 mode.

• HTL Switching Rates Up to 400kHz

• SPI or Pin-Controlled Operation

• SPI Interface Allows Per-Receiver Conﬁguration

• 1.62V to 5.5V Logic Interface

The auxiliary IEC 61131-2 Type-1/Type-3 digital inputs

are designed for operation with switches or proximity

sensors and can be individually configured for TTL operation.

● Integrated Fault Detection Reduces Down-Time

• Open-Wire and Short-Circuit Detection

• Overvoltage and Undervoltage Fault Detection

All receiver input signals are fault protected to voltage shorts

in the ±40V range. Per channel fault detection provides

warning of irregular conditions such as small differential

signals, shorts, opens, overvoltages, and undervoltages.

● Integrated Protection Ensures Robust

Communication

• ±40V Fault Protection Range

• ±20V RS-422 Common Mode Range

The MAX14890E features a pin-selectable SPI or parallel-

logic interface. SPI control provides detailed diagnostics

and individual configurations for receivers.

• DI Glitch Filters

• ±25kV HBM ESD

• ±7kV Air-Gap per IEC 61000-4-2 ESD

• ±10kV Contact per IEC 61000-4-2 ESD

• -40°C to +125°C Operating Temperature Range

The MAX14890E is available in a 32-pin TQFN-EP (5mm

x 5mm) and operates over the -40°C to +125°C tempera-

ture range.

Applications

● Encoder Interfaces

● Motor Controllers

● Pulse Counters

Ordering Information appears at end of data sheet.

Typical Operating Circuit

● Servo Control Commutation

3.3V to 5V

V_CC

Input Receiver Modes

V_L

ENCODER

MODE

RS-422

D-HTL

SE-HTL

TTL

RxA RxB RxZ RxY RxDI2 RxDI3

RxA

RxB

RS-422 A

RS-422 B

RS-422 Z

120Ω

AFAULT

√

BFAULT

ZFAULT

RxZ

RxY

120Ω

√

DIY

ASIC

TTL ALARM

YFAULT

LO2

DI2

DI3

PROXIMITY

SENSOR

RxD2

LO3

PROXIMITY

SENSOR

RxD3

SNGL/CLK = 0

TTL/SDI = 1

DI/TTLY = 1

DI/TTL2 = 1

DI/TTL3 = 1

MAX14890

COUNTER/

MOTOR

CONTROLLER

ENCODER CIRCUIT WITH RS-422 SIGNALS AND TTL ALARM SIGNAL

19-7536; Rev 2; 5/20

12 3 4 5 6 7...30

中文翻译

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与MAX14890E相关器件

型号	品牌	获取价格	描述	数据表
MAX14890EATJ+	MAXIM	获取价格	Line Receiver,
MAX14890EATJ+T	MAXIM	获取价格	Line Receiver,
MAX14891E	ADI	获取价格	四通道、故障保护RS-485/RS-422接收器，具有故障检测
MAX14895E	MAXIM	获取价格	Enhanced VGA Port Protector DDC Outputs have Internal Pullups
MAX14895E	ADI	获取价格	增强型VGA端口保护器
MAX1489E	MAXIM	获取价格	【15kV ESD-Protected, Quad, Low-Power RS-232 L
MAX1489E	ADI	获取价格	±15kV ESD保护、四路、低功耗RS-232线接收器
MAX1489E_V01	MAXIM	获取价格	Â±15kV ESD-Protected, Quad, Low-Power RS-232
MAX1489EC/D	MAXIM	获取价格	【15kV ESD-Protected, Quad, Low-Power RS-232 L
MAX1489ECPD	MAXIM	获取价格	【15kV ESD-Protected, Quad, Low-Power RS-232 L

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