MAX31912AUI+ by Analog Devices

Ultra-Low Power Industrial, Octal, Digital Input Translator/Serializer

Status: Active
Series: MAX31912
RoHS: Unknown
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For new designs, please refer to MAX22190 › 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. 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 discrete resistor-divider implementations. 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. Field-side LED drivers recycle the current from the eight inputs to provide visual input status indication without any additional current or power consumption. 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 pincompatible version of this device, the MAX31913, which does not include the patent-pending current-switching circuitry included in the MAX31912.

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Features

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
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 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
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
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
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
Wide Operating Field Supply Range of 7V to 36V
Can Be Powered from the Logic-Side Using a 5V Supply

Specifications

Sensor Interface Type IEC 61131-2 Digital Input Types 1, 2, 3
µC Interface Type SPI
# Channels 8
VSUPPLY (V) (min) 7
VSUPPLY (V) (max) 36
ISUPPLY (µA) (typ) 1600
Low Power Shutdown No
Oper. Temp. (°C) -40 to +125
Package/Pins TSSOP/28
BudgetaryPrice (See Notes) 0

MAX31912AUI+ Semiconductors - ICs by Analog Devices

XLATOR/SERIALIZER 8CH 200KBPS TSSOP28

Electronic & Electrical Components>Semiconductors - ICs>Driver & Interface ICs
Status: Unknown
Series: -
RoHS: Unknown
Download Datasheet Visit Manufacturer Site View Pricing & Stock

Specifications

SERDES Function Serialiser
Data Rate 200Kbps
IC Input Type Analogue
IC Output Type Digital
Driver Case Style TSSOP
No. of Pins 28Pins
Supply Voltage Min 7V
Supply Voltage Max 36V
No. of Inputs 8
No. of Outputs 8Outputs
Product Range -
Automotive Qualification Standard -
RoHS Phthalates Compliant To Be Advised
MSL MSL 1 - Unlimited
SVHC No SVHC (15-Jan-2018)

Alternative Descriptions

XLATOR/SERIALIZER, 8CH, 200KBPS, TSSOP28 | Farnell

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