MAX14890EATJ+

MAX14890EATJ+ Datasheet

MAX14890E

Part	Datasheet
MAX14890EATJ+	MAX14890EATJ+ (pdf)

Related Parts	Information
MAX14890EATJ+T	MAX14890EATJ+T
MAX14890EEVKIT#	MAX14890EEVKIT#

PDF Datasheet Preview
MAX14890E Incremental Encoder Interface for RS-422, HTL, and TTL with Digital Inputs The MAX14890E incremental encoder receiver contains four differential receivers and two single-ended receivers. 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. 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. 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. The MAX14890E features a pin-selectable SPI or parallellogic interface. SPI control provides detailed diagnostics and individual configurations for receivers. The MAX14890E is available in a 32-pin TQFN-EP 5mm x 5mm and operates over the -40°C to +125°C temperature range. Ordering Information appears at end of data sheet. Typical Operating Circuit ENCODER RS-422 A RS-422 B RS-422 Z TTL ALARM PROXIMITY DO SENSOR PROXIMITY DO SENSOR VCC A RxA A B RxB Z RxZ DIY RxY DI2 RxD2 AO AFAULT BO BFAULT ZO ZFAULT YO YFAULT 3.3V to 5V DI3 RxD3 MAX14890 SNGL/CLK = 0 TTL/SDI = 1 DI/TTLY = 1 DI/TTL2 = 1 DI/TTL3 = 1 ASIC COUNTER/ MOTOR CONTROLLER ENCODER CIRCUIT WITH RS-422 SIGNALS AND TTL ALARM SIGNAL Benefits and Features ●● High Flexibility Supports All Encoder Types • Selectable RS-422/HTL/TTL/DI Receivers • RS-422/TTL Switching Rates Up to 35Mbps • HTL Switching Rates Up to 400kHz • SPI or Pin-Controlled Operation • SPI Interface Allows Per-Receiver Configuration • 1.62V to 5.5V Logic Interface ●● Integrated Fault Detection Reduces Down-Time • Open-Wire and Short-Circuit Detection • Overvoltage and Undervoltage Fault Detection ●● Integrated Protection Ensures Robust Communication • ±40V Fault Protection Range • ±20V RS-422 Common Mode Range • 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 ●● Encoder Interfaces ●● Motor Controllers ●● Pulse Counters ●● Servo Control Commutation Input Receiver Modes MODE RxA RxB RxZ RxY RxDI2 RxDI3 RS-422 D-HTL SE-HTL MAX14890E Incremental Encoder Interface for RS-422, HTL, and TTL with Digital Inputs Absolute Maximum Ratings Ordering Information PART TEMP RANGE MAX14890EATJ+ -40°C to +125°C MAX14890EATJ+T -40°C to +125°C PIN PACKAGE 32 TQFN-EP 32 TQFN-EP +Denotes a lead Pb -free/RoHS-compliant package. T = Tape and reel. *EP = Exposed pad. Chip Information PROCESS BiCMOS Package Information For the latest package outline information and land patterns footprints , go to Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. PACKAGE TYPE LAND CODE PATTERN NO. 32 TQFN-EP T3255+6 21-0140 90-0603 Maxim Integrated 29 MAX14890E 3/15 Initial release Incremental Encoder Interface for RS-422, HTL, and TTL with Digital Inputs PAGES CHANGED For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values min and max limits shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance. Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc. 2015 Maxim Integrated Products, Inc. 30

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MAX14890E

Incremental Encoder Interface for RS-422, HTL, and TTL with Digital Inputs

The MAX14890E incremental encoder receiver contains four differential receivers and two single-ended receivers.

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.

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.

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.

The MAX14890E features a pin-selectable SPI or parallellogic interface. SPI control provides detailed diagnostics and individual configurations for receivers.

The MAX14890E is available in a 32-pin TQFN-EP 5mm x 5mm and operates over the -40°C to +125°C temperature range.
Ordering Information appears at end of data sheet.

Typical Operating Circuit

ENCODER RS-422 A

RS-422 B

RS-422 Z

TTL ALARM

PROXIMITY DO SENSOR

PROXIMITY DO SENSOR

VCC A

RxA A

B RxB

Z RxZ

DIY RxY

DI2 RxD2

AO AFAULT

BO BFAULT

ZO ZFAULT

YO YFAULT
3.3V to 5V

DI3 RxD3

MAX14890

SNGL/CLK = 0 TTL/SDI = 1 DI/TTLY = 1 DI/TTL2 = 1 DI/TTL3 = 1

ASIC

COUNTER/ MOTOR

CONTROLLER

ENCODER CIRCUIT WITH RS-422 SIGNALS AND TTL ALARM SIGNAL

Benefits and Features
●● High Flexibility Supports All Encoder Types
• Selectable RS-422/HTL/TTL/DI Receivers
• RS-422/TTL Switching Rates Up to 35Mbps
• HTL Switching Rates Up to 400kHz
• SPI or Pin-Controlled Operation
• SPI Interface Allows Per-Receiver Configuration
• 1.62V to 5.5V Logic Interface
●● Integrated Fault Detection Reduces Down-Time
• Open-Wire and Short-Circuit Detection
• Overvoltage and Undervoltage Fault Detection
●● Integrated Protection Ensures Robust Communication
• ±40V Fault Protection Range
• ±20V RS-422 Common Mode Range
• 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
●● Encoder Interfaces ●● Motor Controllers ●● Pulse Counters ●● Servo Control Commutation

Input Receiver Modes

MODE RxA RxB RxZ RxY RxDI2 RxDI3

RS-422

D-HTL

SE-HTL

MAX14890E

Incremental Encoder Interface for RS-422, HTL, and TTL with Digital Inputs

Absolute Maximum Ratings
Ordering Information

PART

TEMP RANGE

MAX14890EATJ+
-40°C to +125°C

MAX14890EATJ+T
-40°C to +125°C

PIN PACKAGE 32 TQFN-EP 32 TQFN-EP
+Denotes a lead Pb -free/RoHS-compliant package. T = Tape and reel. *EP = Exposed pad.

Chip Information

PROCESS BiCMOS

Package Information

For the latest package outline information and land patterns footprints , go to Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status.

PACKAGE TYPE

LAND

CODE

PATTERN NO.
32 TQFN-EP T3255+6 21-0140
90-0603

Maxim Integrated 29

MAX14890E
3/15

Initial release

Incremental Encoder Interface for RS-422, HTL, and TTL with Digital Inputs

PAGES CHANGED
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at

Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values min and max limits shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.

Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc. 2015 Maxim Integrated Products, Inc. 30

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived MAX14890EATJ+ Datasheet file may be downloaded here without warranties.

Datasheet ID: MAX14890EATJ+ 647233