MAX31910 Translator/Serializer Datasheet

MAX31910 Datasheet PDF, Equivalent


Part Number

MAX31910

Description

Digital Input Translator/Serializer

Manufacture

Maxim Integrated

Total Page 17 Pages
Datasheet
Download MAX31910 Datasheet


MAX31910
MAX31910
EVALUATION KIT AVAILABLE
Ultra-Low Power Industrial, Octal, Digital Input
Translator/Serializer
General Description
The MAX31910 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.
The device features integrated current limiting, lowpass
filtering, and channel serialization. Input current limit-
ing allows a significant reduction in power consumed
from the field voltage supply as compared to traditional
discrete resistor-divider implementations. In addition, to
achieve the lowest in-class power dissipation, the device
uses patent-pending circuit techniques to achieve further
reduction of power beyond what is possible by input
current limiting alone.
Selectable on-chip lowpass filters allow flexible debouncing
and filtering of sensor outputs based on the application.
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.
For low-cost applications, Maxim Integrated offers a
pin-compatible version of this device, the MAX31911.
The MAX31911 does not include the patent-pending
current clamp-switching circuitry that is included with the
MAX31910.
The MAX31912 and MAX31913 versions includes energy-
less LED drivers while maintaining pin compatibility.
Benefits and Features
● Ultra-Low Power and Heat Dissipation
• Low Quiescent Current (1.4mA 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
● High Integration Reduces BOM Count, Board
Size, and System Cost
• 8 High-Voltage Input Channels (36V max)
• On-Chip 8-1 Serialization with SPI Interface
• On-Chip 5V Regulator
• On-Chip Overtemperature Indicator
• On-Chip Field Supply Voltage Monitor
• 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
Applications
● Digital Input Modules for PLCs
● Industrial, Building, and Process Automation
● Motor Control
Ordering Information appears at end of data sheet.
19-6440; Rev 5; 4/15

MAX31910
MAX31910
Block Diagram
24V
VCC24V
SENSORS
RIREF
RT1
IN1
RT8
IN8
GND
Ultra-Low Power Industrial, Octal, Digital Input
Translator/Serializer
5V REGULATOR
SUPPLY
MONITOR
VREF
TEMP
MONITOR
MAX31910
OR
SWITCHED
CURRENT
LIMITER
VOLTAGE
VREF COMPARATOR
LP
FILTER
INPUT CHANNEL 0
CRC GEN.
SERIALIZER
5VOUT
5V
FAULTB
DB0
DB1
SIN
MODESEL
CLK
CS
µCONTROLLER
OR
ISOLATION
INPUT CHANNEL 7
SOUT
www.maximintegrated.com
Maxim Integrated 2


Features MAX31910 EVALUATION KIT AVAILABLE Ultra -Low Power Industrial, Octal, Digital I nput Translator/Serializer General Des cription The MAX31910 industrial interf ace serializer translates, conditions, and serializes the 24V digital output o f sensors and switches used in industri al, process, and building automation to 5V CMOS-compatible signals required by microcontrollers. It provides the fron t-end interface circuit of a programmab le logic controller (PLC) digital input module. The device features integrated current limiting, lowpass filtering, a nd channel serialization. Input current limiting allows a significant reductio n in power consumed from the field volt age supply as compared to traditional d iscrete resistor-divider implementation s. In addition, to achieve the lowest i n-class power dissipation, the device u ses patent-pending circuit techniques t o achieve further reduction of power be yond what is possible by input current limiting alone. Selectable on-chip lowpass filters allow flexib.
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