MAXIM MAX14821 User Manual

19-5916; Rev 1; 2/12

MAX14821

IO-Link Device Transceiver

General Description

The MAX14821 transceiver is suitable for IO-Link® devices and 24V binary sensors/actuators. All specified IO-Link data rates are supported. In IO-Link applications, the transceiver acts as the physical layer interface to a microcontroller running the data-link layer protocol. Additional 24V digital inputs and outputs are provided. Two internal linear regulators generate common sensor and actuator power requirements: 5V and 3.3V.

On-board C/Q and DO drivers are independently configurable for push-pull, high-side (PNP), or low-side (NPN) operation. The device detects the IO-Link C/Q wake-up condition and generates a wake-up signal on the activelow WU output. The C/Q and DI inputs have selectable current loads for use in actuators.

An SPI™ interface allows configuration and monitoring of the device. Extensive alarm conditions are detected and communicated through the IRQ output and the SPI interface. The device features reverse-polarity, short-circuit, and thermal protection. All power lines are monitored for undervoltage conditions.

The C/Q and DO drivers are specified for sourcing/sinking up to 100mA.

The device is available in a 2.5mm x 2.5mm, 25-pin WLP and a 4mm x 4mm, 24-pin TQFN package. Both are specified over the extended -40NC to +85NC temperature range.

Applications

IO-Link Sensors Industrial Sensors and Actuators IO-Link Actuators

Features

S IO-Link Specification v.1.0 and v.1.1 Physical Layer-

Compliant

S Supports COM1, COM2, and COM3 Data Rates S IO-Link Device Wake-Up Detection S Push-Pull, High-Side, or Low-Side Outputs S 100mA Specified C/Q Output Drive S Auxiliary 24V, 100mA Digital Output S Auxiliary 24V Digital Input S Optional 6mA/7mA Current Loads at Both 24V Inputs S 5V and 3.3V Linear Regulators S Reverse-Polarity Protected 24V Supply Output S EMI Emission Control Through Slew-Controlled Driver S SPI Interface for Configuration and Monitoring S 2.5V to 5V Logic Interface Levels S Reverse-Polarity and Short-Circuit Protection on All

24V Inputs/Outputs

S High-Temperature Warning and Thermal Shutdown S Extensive Fault Monitoring and Reporting S -40NC to +85NC Operating Temperature Range S 2.5mm x 2.5mm WLP and 4mm x 4mm TQFN

Packages

Ordering Information appears at end of data sheet.

Typical Operating Circuit

5V

3.3V

10kΩ

V

CC

MICROCONTROLLER

GND

IO-Link is a registered trademark of Profibus User Organization (PNO). SPI is a trademark of Motorola, Inc.

For related parts and recommended products to use with this part, refer to: www.maxim-ic.com/MAX14821.related

�� Maxim Integrated Products 1

UVGPIO2

SPI

WUIRQ

RXRX

TXCTX

TXENRTS

LOGPIO1

LDO33VLTXQ

MAX14821

V

LDOIN

5

0.1μF1μF 0.1μF

1μF

0.8Ω

L+

1

2

4

3

L-

V

P

V

CC

DO

C/Q

GND

DI

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

MAX14821

IO-Link Device Transceiver

Functional Diagram

SDI

SDO

SCLK

IRQ

WU

TXQ

TXC

TXEN

DRIVER

V

5

5V LDO

V

P

PROTECTION

C/Q LOAD

PROTECTION

V

CC

C/Q

GND

DI

LDO33 LDOIN

UV

UV MONITOR

V

L

CS

STATUS

AND

CONFIGURATION

RX

WAKE-UP

DETECT

LI

3.3V LDO

FILTER

DI LOAD

LO

MAX14821

DRIVER

DoEn

PROTECTION

DO

�� Maxim Integrated Products 2

MAX14821

IO-Link Device Transceiver

ABSOLUTE MAXIMUM RATINGS

(All voltages referenced to GND, unless otherwise noted.)

VCC ......................................................................... -40V to +40V

VP (IVP < 50mA) ..... the higher of -0.3V and (VCC - 1V) to +40V

LDOIN ....................................................................-0.3V to +40V

V5 ..................... -0.3V to the lesser of (V

LDO33 ..................... -0.3V to the lesser of (V5 + 0.3V) and +6V

VL ............................................................................. -0.3V to +6V

DI ........................................................................... -40V to +40V

C/Q, DO ...................... MIN: the higher of -40V and (VCC - 40V)

MAX: the lesser of +40V and (VCC + 40V) Logic Inputs

TXC, TXQ, TXEN, LO, CS, SDI, SCLK ..... -0.3V to (VL + 0.3V)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

+ 0.3V) and +6V

LDOIN

PACKAGE THERMAL CHARACTERISTICS (Note 1)

TQFN

Junction-to-Ambient Thermal Resistance (BJA) ..........36NC/W

Junction-to-Case Thermal Resistance (BJC) .................3NC/W

Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-

layer board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial.

Logic Outputs

RX, WU, LI, SDO, IRQ ............................. -0.3V to (VL + 0.3V)

UV ........................................................................ -0.3V to +6V

Continuous Current Into Any Logic Pin ........................... Q50mA

Continuous Power Dissipation

TQFN (derate 27.8mW/NC above +70NC)..................2222mW

WLP (derate 22.7mW/NC above +70NC)....................1816mW

Operating Temperature Range .......................... -40NC to +85NC

Maximum Junction Temperature .....................................+150NC

Storage Temperature Range ............................ -65NC to +150NC

Lead Temperature (TQFN only; soldering, 10s) .............+300NC

Soldering Temperature (reflow) ......................................+260NC

WLP

Junction-to-Ambient Thermal Resistance (BJA) ..........44NC/W

DC ELECTRICAL CHARACTERISTICS

(VCC = 18V to 36V, VL = 2.3V to 5.5V, V values are at VCC = 24V, VL = 3.3V, and TA = +25NC, unless otherwise noted.) (Note 2)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

VCC Supply Voltage V

VCC Supply Current I

VCC Undervoltage-Lockout Threshold

VCC Undervoltage-Lockout Threshold Hysteresis

V5 Supply Current I

V5 Undervoltage-Lockout Threshold

VL Logic-Level Supply Voltage V

VL Logic-Level Supply Current I

VL Undervoltage Threshold V

5V LDO (V5)

LDOIN Input Voltage Range V

LDOIN Supply Current I

V

= 0V; all logic inputs at VL or GND; TA = -40NC to +85NC, unless otherwise noted. Typical

GND

CC

V

CCUVLO

CCUVLO_HYST

5_IN

V

5UVLO

L

LUVLO

LDOIN

For driver operation 9 36 V

VCC = 24V, C/Q as input, no load on V5 or LDO33, LDOIN not connected to VP, V

= 24V

LDOIN

VCC falling 6 7.4 9 V

LDOIN shorted to V5, external 5V applied to V5, no switching, LDO33 disabled

V5 falling 2.0 V

All logic inputs at VL or GND 5

VL falling 0.65 0.95 1.30 V

V

= 24V, C/Q is configured as an

LDOIN

input, no load on V5 or LDO33

1 2.5 mA

200 mV

3 mA

2.3 5.5 V

FA

7 36 V

2.5 5 mA

�� Maxim Integrated Products 3

IO-Link Device Transceiver

DC ELECTRICAL CHARACTERISTICS (continued)

(VCC = 18V to 36V, VL = 2.3V to 5.5V, V values are at VCC = 24V, VL = 3.3V, and TA = +25NC, unless otherwise noted.) (Note 2)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

V5 Output Voltage Range V

V5 Load Regulation

3.3V LDO (LDO33)

LDO33 Output Voltage V

LDO33 Undervoltage-Lockout Threshold

LDO33 Load Regulation 1mA < I

24V INTERFACE

C/Q Driver Output-Voltage High V

C/Q Driver Output-Voltage Low V

C/Q Driver Source Current Limit I

C/Q Driver Sink Current Limit I

DO Driver Output-Voltage High V

DO Driver Output-Voltage Low V

DO Driver Source Current Limit I

DO Driver Sink Current Limit I

C/Q, DI Input Voltage Range V

C/Q Input Threshold High V

C/Q Input Threshold Low V

C/Q Input Hysteresis V

DI Input Threshold High V

DI Input Threshold Low V

DI Input Hysteresis V

C/Q Weak Pulldown Current I

= 0V; all logic inputs at VL or GND; TA = -40NC to +85NC, unless otherwise noted. Typical

GND

5

No load on V5, 7V P V

1mA < I

LOAD

< 10mA, V

0.1FF bypass capacitor on V

1mA < I

LOAD

< 30mA, V

0.1FF bypass capacitor on V

LDOIN

P 36V

= 7V,

5

= 7V,

, 10W–1FF

5

compensation network added to V

LDO33

V

LDO33UVLOVLDO33

OH_C/Q

OL_C/Q

OH_C/Q

OL_C/Q

OH_DO

OL_DO

OH_DO

OL_DO

IN

IH_C/Q

IL_C/Q

HYS_C/Q

IH_DI

IL_DI

HYS_DI

PDC/Q

No load on LDO33 3.1 3.3 3.5 V

falling 2.4 V

< 20mA, V

LOAD

C/Q high-side enabled, I

= 7V 0.25 %

LDOIN

= -100mA,

C/Q

9V P VCC P 36V

C/Q low-side enabled, I

= +100mA,

C/Q

9V P VCC P 36V

C/Q high-side enabled, V

< (VCC -

C/Q

3V), 9V P VCC P 36V

C/Q low-side enabled, V

C/Q

> 3V,

9V P VCC P 36V

DO high-side enabled, IDO = +100mA, 9V P VCC P 36V

DO low-side enabled, IDO = -100mA, 9V P VCC P 36V

DO high-side enabled, VDO < (V

CC

DO high-side enabled, VDO > 3V -190 -135 -100 mA

For valid RX, LI -1.0

C/Q driver disabled 10.5 13.0 V

C/Q driver disabled 8.0 11.5 V

C/Q driver disabled 1.0 V

C/Q driver disabled, V

C/Q

= (V

CC

MAX14821

4.75 5.00 5.25 V

0.8

5

VCC -

+100 +140 +190 mA

-190 -140 -100 mA

VCC

- 3V) +100 +135 +190 mA

- 1V) 100 400

VCC –

1.3

1.4 3 V

VCC -

- 3

1.6

1.6 3 V

VCC +

1.0

6.8 8 V

5.2 6.4 V

1 V

%

V

FA

�� Maxim Integrated Products 4

MAX14821

IO-Link Device Transceiver

DC ELECTRICAL CHARACTERISTICS (continued)

(VCC = 18V to 36V, VL = 2.3V to 5.5V, V values are at VCC = 24V, VL = 3.3V, and TA = +25NC, unless otherwise noted.) (Note 2)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

DO Weak Pulldown Current I

DI Weak Pulldown Current I

C/Q Input Capacitance C

DO Input Capacitance C

DI Input Capacitance C

C/Q, DI CURRENT SINK

C/Q Load Current I

DI Load Current I

LOGIC INPUTS (TXC, TXQ, TXEN, LO, CS, SDI, SCLK)

Logic-Input Voltage Low V

Logic -Input Voltage High V

Logic-Input Leakage Current I

Logic-Input Capacitance C

LOGIC OUTPUTS (RX, WU, LI, UV, SDO, IRQ)

Logic-Output Voltage Low V

Logic-Output Voltage High

V

SDO Leakage Current I

THERMAL SHUTDOWN

Thermal Warning Threshold Die temperature rising, OTemp bit is set +115

Thermal Warning Threshold Hysteresis

Thermal Shutdown Threshold Die temperature rising +150

Thermal Shutdown Hysteresis 20

= 0V; all logic inputs at VL or GND; TA = -40NC to +85NC, unless otherwise noted. Typical

GND

PDDO

LLM_C/Q

LLM_DI

V

OHRX

OHWU

V

OHSDO,

V

OHIRQ

LK_SDO

PDDI

C/Q

DO

DI

IL

IH

LEAK

IN

OL

, V

DO driver disabled, V VDO = (V

CC

- 1V)

DI load disabled, V VDI = (V

CC

- 1V)

C/Q driver disabled 40 pF

DO driver disabled 40 pF

C/Q load enabled (C/QLoad = 1)

DI load enabled (DiLoad = 1)

Logic input = GND or V

I

= -5mA 0.4 V

OUT

,

OHLI

I

= 5mA (Note 3)

OUT

,

SDO disabled, SDO = GND or V

CC

= 36V,

L

= 36V,

0V P V

5V P V

C/Q

P 5V

0V P VDI P 5V

9V P V

DI

L

40 120

50 300

0 9

5 6.6 9

0 9

6 7.5 9

0.3 x V

L

-1 +1

VL -

0.6

-1 +1

Die temperature falling, OTemp bit is cleared

FA

20 pF

mA

0.7 x V

L

FA

5 pF

FA

NC

20

NC

V

�� Maxim Integrated Products 5

IO-Link Device Transceiver

AC ELECTRICAL CHARACTERISTICS

(VCC = 18V to 36V, VL = 2.3V to 5.5V, V values are at VCC = 24V, VL = 3.3V, and TA = +25NC, unless otherwise noted.) (Note 2)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

C/Q, DO, DI INTERFACES

Data Rate DR

DRIVER (C/Q, DO)

Driver Low-to-High Propagation Delay

Driver High-to-Low Propagation Delay

Driver Skew t

Driver Rise Time t

Driver Fall Time t

Driver Enable Time High t

Driver Enable Time Low t

Driver Disable Time High t

Driver Disable Time Low t

RECEIVER (C/Q, DI) (Figure 4)

Receiver Low-to-High Propagation Delay

Receiver High-to-Low Propagation Delay

WAKE-UP DETECTION (Figure 5)

Wake-Up Input Minimum Pulse Width

Wake-Up Input Maximum Pulse Width

WU Output Low Time

= 0V; all logic inputs at VL or GND; TA = -40NC to +85NC, unless otherwise noted. Typical

GND

HiSlew = 1 4.8 230.4 HiSlew = 0 4.8 38.4

t

PDLH

t

PDHL

SKEW

RISE

FALL

ENH

ENL

DISH

DISL

t

PRLH

t

PRHL

t

WUMIN

t

WUMAX

t

WUL

Push-pull or high-side (PNP) configuration, Figure 1

Push-pull or low-side (NPN) configuration, Figure 1

|t

- t

PDLH

Push-pull or high-side (PNP) configuration, Figure 1

Push-pull or low-side (NPN) configuration, Figure 1

Push-pull or high-side (PNP) configuration, Figure 3

Push-pull or low-side (NPN) configuration, Figure 2

Push-pull or high-side (PNP) configuration, Figure 2 (Note 4)

Push-pull or low-side (NPN) configuration, Figure 3 (Note 4)

RxFilter = 1 0.2 2

RxFilter = 0 0.4 2

RxFilter = 1 0.3 2

RxFilter = 0 0.5 2

Valid wake-up condition on C/Q 120 190 260

| 0.1 2

PDHL

HiSlew = 1 0.5 2

HiSlew = 0 1.6 5

HiSlew = 1 0.5 2

HiSlew = 0 1.6 5

HiSlew = 1 0.4 1.7

HiSlew = 0 1.5 4

HiSlew = 1 0.4 1.7

HiSlew = 0 1.4 4

HiSlew = 1 0.3 1

HiSlew = 0 0.8 7

HiSlew = 1 0.3 1

HiSlew = 0 0.9 7

HiSlew = 1 1.6 3

HiSlew = 0 1.6 3

HiSlew = 1 0.1 3

HiSlew = 0 0.1 3

MAX14821

30 40 50

120 140 160

kbps

Fs

�� Maxim Integrated Products 6

MAX14821

IO-Link Device Transceiver

AC ELECTRICAL CHARACTERISTICS (continued)

(VCC = 18V to 36V, VL = 2.3V to 5.5V, V values are at VCC = 24V, VL = 3.3V, and TA = +25NC, unless otherwise noted.) (Note 2)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

SPI TIMING (CS, SCLK, SDI, SDO) (Figure 6)

SCLK Clock Period t

SCLK Pulse-Width High t

SCLK Pulse-Width Low t

CS Fall to SCLK Rise Time SCLK Rise to CS Rise Hold Time

SDI Hold Time t

SDI Setup Time t

Output Data Propagation Delay t

SDO Rise and Fall Times t

Minimum CS Pulse

Note 2: All devices are 100% production tested at TA = +25NC. Limits over the operating temperature range are guaranteed by

design.

Note 3: UV is an open-drain output. Connect UV to a voltage less than 5.5V through an external pullup resistor. Note 4: Disable time measurements are load dependent.

= 0V; all logic inputs at VL or GND; TA = -40NC to +85NC, unless otherwise noted. Typical

GND

CH+CL

CH

CL

t

CSS

t

CSH

DH

DS

DO

FT

t

CSW

83.3 ns

41.65 ns

20 ns

10 ns

32 ns

20 ns

76.8 ns

�� Maxim Integrated Products 7

TXEN

(TXC AND TXQ)

OR LO

OR DO

C/Q

IO-Link Device Transceiver

TXEN

TXCC/Q OR DO

t

FALL

MAX14821

GND

t

TXQ

LO

PDHL

t

RISE

3.3nF 5kΩ

50%

t

PDLH

MAX14821

V

L

0V

V

L

0V

V

90% 50%

10%

CC

0V

Figure 1. C/Q and LO Driver Propagation Delays and Rise/Fall Times

TXEN

C/Q

V

L

TXC

TXQ

t

ENL

10%

TXEN

MAX14821

GND

C/Q

t

DISH

Figure 2. C/Q Driver Enable Low and Disable High Timing with External Pullup Resistor

V

CC

10%

5kΩ

3.3nF

V

L

0V

V

CC

0V

�� Maxim Integrated Products 8

TXEN

TXC

TXQ

MAX14821

IO-Link Device Transceiver

TXEN

C/Q

MAX14821

GND

3.3nF 5kΩ

V

L

t

ENH

C/Q

90%

Figure 3. C/Q Driver Enable High and Disable Low Timing

C/Q OR DI

OR DI

C/Q

t

PRLH

OR LI

RX

MAX14821

GND

TXEN

RX OR LI

t

DISL

t

PRHL

90%

50%

15pF

50%

0V

V

CC

0V

V

CC

0V

V

L

0V

Figure 4. C/Q and DI Receiver Propagation Delays

�� Maxim Integrated Products 9