Current limiters for fast digital automation inputs

CLT01-38S4 400 kbit/s datarate for fast sensors and high-speed sampling digital inputs

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The CLT01-38S4 adds to the existing current-limiter family, with the same concern for power consumption savings, to give you a full range of solutions.The CLT01-38S4 is an octal input termination device with a high- speed SPI output. Its maximum input datarate is 400 kbit/s while the SPI output rate is 6.25 MHz.As for previous CLT devices, robustness is a key parameter for the CLT01-38S4, with compliance to IEC 61000-4-x surge standards.The CLT01-38S4 runs with all types of sensor according to IEC 61131-2: type 1 and 3, with a 2.35 mA limited current, and type 2, using two inputs per sensor with the correct RREF.

KEY BENEFITSRobustness

• IEC61000-4-2• ±8kVcontact• ±15kVair

• IEC61000-4-4• ±4kV

• IEC61000-4-5• 2.5kV

• Reversepolarity(-30V)

Speed

• 8-bitmode,400kbit/sinputdatarate

• 16-bitmode,200kbit/sinputdatarate

Energy harvesting

• LEDpoweredwithunusedcurrent

• LEDpoweredonlyinon-state

• AdjustableILIM,withtypical2.1mAto

2.6mAatRREF=15kΩ

• 1WsavedperCLT01-38S4

MAIN APPLICATIONS• Factoryautomation

• Buildingautomation

• RemoteIOcontrollers

• Proximitysensorinterfaces(EN60947-5-2)

SpeedOut: 6.25 MHz

SpeedIn: 400 kbit/s

Energy harvesting LED status

RobustnessIEC 61000-4 x compliant

Serializer

VR

VR

CLT01-38S4 WIRING DIAGRAM

xCLT product CLT3-4BT6 PCLT-2AT4 SCLT3-8BT8 CLT01-38S4

Number of inputs 4 2 8 8

Input IEC 61131-2 Type 1 and 3 Type 1, 2 and 3 Type 1, 2 and 3 Type 1, 2 and 3

Output type IsolatedIsolated

Non-isolatedIsolated

Non-isolatedSPI serialized transfer

IsolatedNon-isolated

SPI serialized transfer

Output drive Opto transistorOpto transistor

CMOS compatible

Opto transistorElectromagnetic isolator

CMOS compatible

Opto transistorElectromagnetic isolator

CMOS compatible

Input current limiter 2.8 mA 2.5 to 7.5 mA 2.35 mA 2.35 mA

Current tolerance 25% 18% 10% 10%

Front-end LED status Yes, using type 1 Yes Yes Yes

Surge level > 1 kVType 3: 1 kV

Type 2: 0.5 kV> 1 kV > 1 kV

ESD level 8 kV 15 kV 15 kV 15 kV

Package TSSOP-20 TSSOP-14 HTSSOP-38 HTSSOP-38

Input datarate 10 kbit/s 10 kbit/s 40 kbit/s 400 kbit/s

Evaluation board STEVAL-IPF008V1 STEVAL-IPF004V1 STEVAL-IPF007V1 STEVAL-IPF023V1

Application note AN2527 AN2482 AN2846 and AN3031 -

• Input datarate @ 400 kbit/s• Scalable (daisy chain)

• Thermal alarm• Overvoltage alarm• Undervoltage alarm

• SPI interface• CMOS interface• (Opto-)coupler interface

• Programmable current

• Digital filtrer• Reverse polarity• ESD protection• Current limiter

• Number of channels

• Sensors (IEC 61131-2) • Type 1 • Type 2 • Type 3

Immun

ity

CLT3-4B

PCLT-2A

CLT01-38S4

24 8 8

Outpu

tCo

ntrol

HTSSOP38

Quad Quad

SCLT3-8BT8

TSSOP14

TSSOP20

CURRENT-LIMITING TERMINATION (CLT) SERIES

UVA SPIV

CSRS

RPD

VCCVC

RC

VI

RIVIN IN1

IN8

8-inputType 1/3

CLT

LD8LD1

REF

Voltageregulator

VDD

COMS

CLT01-38S4

8/16-bitState transferSPI

CPHA = 0CPOL = 0 MOSI

SPM

O-T = opto-transistor or isolator

MISO

/CS

SCK

Fiel

d bu

sCo

ntro

ller

COMP

DVR

O-T

O-T

O-T

RREF

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