OL2068_技术文档

OL2068

Industrial 30 Volt 4-Channel Differential Power Line Driver - Short Circuit Proof -

Applications

Features

· Industrial encoder interfacing

· Industrial sensor interfacing

· Proximity switches

· Industrial controllers

· Light barriers

· Ultra small package TSSOP 20

· Max. voltage range from 4,5 V – 36 V

· Short circuit proof tri-state outputs drive up to 120mA

sink / source

· Operating frequency up to 4 MHz

· Integrated voltage reg. with 5V output

· Dynamic peak current up to 1,5 Amp.

· High impedance CMOS / TTL compatible buffered

inputs with hysteresis

· Outputs RS422A compatible

Line voltage in

5V , 5mA out

Voltage regulator

Ultra small package TSSOP 20

Differential

Output A

Output A-

CMOS / TTL

Data input

General Description

The OL2068 is an industrial power line

driver and contains four identical short cir-

cuit proof differential line drivers up to 30

Volts driver supply with a joint enable func-

tion. An internal 5 V power supply is used

as reference and supply voltage for the

circuitry and is able to supply max. 5mA

for external 5V components like a sensor

or a constant current source for an LED.

Differential

Output B

Output B-

CMOS / TTL

Data input

CMOS / TTL

Data input

Differential

Output C

Output C-

Differential

Output D

Output D-

CMOS / TTL

Data input

The very small outline TSSOP package

gives excellent thermal power dissipation,

thus the usage in space limited applica-

tions is easy.

Protection logic controller

-

short circuit shut down

Tristate and thermal logic control

Undervoltage and power up reset

Transient and EMI protection

Tristate enable / disable

Thermal shutdown disable

Error signal out

For Stateside information contact...

Quantum Devices, Inc., 112 Orbison St., PO Box 100, Barneveld, WI,

53507

●Tele: (608) 924-3000 ●Fax: (608) 924-3007 ●URL: www.quantumdev.com ●Email: qdisales@quantumdev.com

OL2068

Industrial 30 Volt 4-Channel Differential Power Line Driver - Short Circuit Proof -

Electrical characteristics

All voltage values are referenced to GND (GND = 0V).

Unless stated otherwise all signals are assumed to be high active.

Table 1 Absolute Maximum Ratings

Parameter

Symbol Condition

Min

-0.3

Max

36.0

Unit

V

DC supply voltage

V_CCD

V_IN

DC input voltage

-0.3

V_CC+0.3

±10

V

DC input current

I_In

mA

V

Output voltage

V_OUT

-0.3

-55

V_CC+0.3

1500/100

+125

Driver output current (see cable model)

Storage and operating temperature range

Junction temperature

Lead temperature

I_OUT

T_STGOP

T_J

pulse peak/average

mA

°C

+150¹

T_L

soldering, 10s

+260²

Power dissipation:

PD

still air,

T_A=85°C,

T_J=150°C

OL7272 SOIC16NB: R =111.8 K/W

581

798

mW

thj-

a

OL2068 TSSOP20: R = 81.4 K/W

thj-

a

Table 2 Recommended Operating Conditions

Parameter

Symbol Condition

Min

Max

30.0

V_CCD

5.5

Unit

V

DC supply voltage

V_CCD

4.5

0

DC data input voltage

V_IND

V

DC enable input voltage

V EN³

0

V

IN

Data output voltage

V_OUTD

0

V_CCD

V_CCI

100

V

TMON output voltage

V_OUTTM

0

V

4

Driver output current (see cable model)

Operating ambient temperature range

Junction temperature range (lifetime)

I_OUT

mA

°C

5

T_A

-40

-55

+100

+125

T_J

NOTE:Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress

rating only and functional operation of the device at these or any other conditions above those indicated in the operational section of this

specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability (eq. hot

carrier degradation).

For Stateside information contact...

Quantum Devices, Inc., 112 Orbison St., PO Box 100, Barneveld, WI,

53507

●Tele: (608) 924-3000 ●Fax: (608) 924-3007 ●URL: www.quantumdev.com ●Email: qdisales@quantumdev.com

OL2068

Industrial 30 Volt 4-Channel Differential Power Line Driver - Short Circuit Proof -

Table 3 DC Characteristics (V_CCD= 12.0 V, T_A= 25 °C, unless otherwise noted)

Paramter

Symbol

Condition

Min

0.2

Typ

Max Unit

V

Schmitt trigger inputs section

Data input hysteresis

V_HYSD

V_ILto V_IHand V_IHto V_IL, ENABLE <= 0.8 V

ENABLE <= 0.8 V

0.5

1.7

1.2

0.5

1.7

1.2

Data input positive going threshold

Data input negative going threshold

Enable input hysteresis

V

_TH+D

_TH-D

2.4

V

ENABLE <= 0.8 V

0.8

0.2

V

_HYSEN V_ILto V_IHand V_IHto V_IL,

_TH+EN

Enable input pos. going threshold

Enable input neg. going threshold

Data input leakage current -Low

-High

2.4

V

_TH-EN

I_ILD

0.8

ENABLE <= 0.8 V

-10.0

+10.0 µA

I

_IHD

I_ILEN

_IHEN

Enable input leakage current -Low

-High

I

Push-pull output drive section

- Low side switch outputs⁶

Low level output voltage

V_OLB

V_OLT

R_DSON

I_OZ

V_CCD= 4.75 V, I_LOAD= 20 mA, ENABLE <= 0.08 V

V_CCD= 30 V, I_LOAD= 30mA, ENABLE <= 0.08 V

I_LOAD= 30mA

0.3

0.4

13

0.5

20

V

Output resistance

WW

High-impedance output leakage current

V_CCD= 30.0 V, ENABLE >= 2.4 V

-10.0

+10.0 µA

6

- High side switch ouptuts

High level output voltage

V_OHB

V_OHT

R_DSON

I_OZ

V_CCD= 4.75 V, I_LOAD= -20mA, ENABLE <=0.80 V

V_CCD= 30V, I_LOAD= 30mA, ENABLE <=0.8 V

I_LOAD= 30mA

4.2

V_CCD-0.4

V_CCD-0.6

20

V

29.2

Output resistance

30

WW

High-impedance output leakage current

V_CCD= 30.0 V, ENABLE >= 2.4 V

-10.0

+10.0 µA

8

-MON output

Low level output voltage

High level output voltage

Supply parameters section

V_OL

V_OH

I_LOAD= 2.0 mA

I_LOAD= 2.0mA

0.4

V

V_CCI-0.8

9

V_CCDsupply current

I_DB(en) V_CCD= 5.0 V,

_DT(en) V_CCD= 30.0 V, ENABLE <= 0.8 V

_DB(dis) V_CCD= 5.0 V, ENABLE >= 2.4 V

_DT(dis) V_CCD= 30.0 V, ENABLE >= 2.4 V

ENABLE <= 0.8 V

1.5

5.0

0.2

5.0

3.0

5.5

mA

V

I

Internal supply voltage¹⁰

Quiescent current

V_CCI

I_CCIE= 5.0 mA

4.5

11

12

I_CCQ

V_IN= 2.4 V OR 0.8 V

mA

Current from internal voltage

regulator to supply external devices

13

I_CCIE

5.0

mA

Low voltage reset section

Hysteresis for under-voltage reset

V_HYSLVR

0.1

3.5

V

Under-votlage reset negative going threshold

(active)

V

_TH-LVR

_TH+LVR

3.3

3.4

3.7

3.8

Under-voltage reset positive going threshold

(inactive)

3.6

5

V

Under-voltage reset filter time

t

_FILLVR¹⁴

µs

Over-temperature protection section

Over-temp. operate point (junction)

Over-temp. release point (junction)

T_JOP

T_JRP

+165

+135

+185

°C

+125

6

Either the low or high side switch is active at a time.

7

Values will not be part of the production test but guaranteed by design.

Output MON external driving current up to 4mA possible - but using this limits the thermal power budget!

Measured without external load on V_CCIpin, all outputs open.

For decoupling V_CCIplease connect this output with a 100nf capacitor to GND

Depends on supply voltage V_CCD, V_CCIcould be not higher than V_CC- 0.3 V.

This is measured per input with all other inputs held at VCCI or GND.

8

9

10

11

12

13

14

Limited by power dissipation, high I_CCIcurrent with growing V_CCDvoltage generates heat, thus the driving limit can be reached earlier.

Value will not be part of the production test but guaranteed by design.

For Stateside information contact...

Quantum Devices, Inc., 112 Orbison St., PO Box 100, Barneveld, WI,

53507

●Tele: (608) 924-3000 ●Fax: (608) 924-3007 ●URL: www.quantumdev.com ●Email: qdisales@quantumdev.com

OL2068

Industrial 30 Volt 4-Channel Differential Power Line Driver - Short Circuit Proof -

Table 4 AC Characteristics (V_CCD= 12.0 V, T_A= 25 °C, Cable capacitance 1000pF, unless otherwise noted)

Paramter

Symbol

t_OFF

Condition

Min Typ Max Unit

Disable delay time

100 200.0

ns

Enable delay time

t_ON

76

600.0

Propagation delay from 50% point of

rising edge of input pulse to zero crossing

of differential outputs (see figure 1)

t_PLH

V_CCD= 5.0 V

64

74

200.0

ns

V_CCD= 12.0 V

V_CCD= 24.0 V

C_LOAD= 1000 pF

100 330.0

Propagation delay from 50% point of

falling edge of input pulse to zero crossing

of differential outputs (see figure 1)

t_PHL

V_CCD= 5.0 V

70

80

100 330.0

280.0

ns

V_CCD= 12.0 V

V_CCD= 24.0 V

C_LOAD= 1000 pF

15

Output rise time (see figure 2)

t_R

V_CCD= 5.0 V

42

110

120 380.0

200.0

350.0

ns

V_CCD= 12.0 V

V_CCD= 24.0 V

C_LOAD= 1000 pF

Output fall time (see figure 2)

t_F¹⁶

V_CCD= 5.0 V

32

62

84

200.0

350.0

380.0

ns

V_CCD= 12.0 V

V_CCD= 24.0 V

C_LOAD= 1000 pF

V_IH

V_TH+

50%

t_PLH

50%

t_PHL

Input

V_TH-

Input

V_IL

V_OH

90%

Output

V_OL

V_OH

Output

V_OL

10%

50%

t_R

t_F

Figure 2

Definition of Output Rise and Fall Time

V_CCD

V_OH

Figure 3

AC Test Circuit

Output-

Output+

Output-

C_L= 1.000pF

V_OL

Input

1/4

OL2068

t_PHL

t_PLH

Figure 1

Timing diagram with typical asynchronous

propagation delays

C_L

¹⁵Measured from 10% to 90% of the Output signal with a capacitive load on each output pin to ground (see Figure 3).

For Stateside information contact...

Quantum Devices, Inc., 112 Orbison St., PO Box 100, Barneveld, WI,

53507

●Tele: (608) 924-3000 ●Fax: (608) 924-3007 ●URL: www.quantumdev.com ●Email: qdisales@quantumdev.com

OL2068

Industrial 30 Volt 4-Channel Differential Power Line Driver - Short Circuit Proof -

Mechanical characteristics

Package Dimensions

TSSOP20(173 mil)

Symbol

Unit

Min

Typ

Max

6.60(0,26)

4.50(0,18)

-

D

E1

E

6.40(0,25)

-

mm(inch)

mm(mils)

4.30(0,17)

-

6.40(0,25)

A

A1

b

-

0.05(2)

0.19(7)

-

1.20(47)

0.15(6)

0.30(11)

-

e

0.65(26)

L

0.50(20)

-

0.75(30)

-

mm(mils)

o

8

a

Form of delivery and order code

TSSOP20

Antistatic tubes containing 70pcs order part no. OL2068

Tape & Reel part no. OL2068 TR

High thermal power dissipation by integrated heatlink append “HL” to part number.

A demoboard with 2 line drivers plus connectors and status LEDs is available with order code

OL2068 Demo

Notes:

For hybrid applications this driver is also available as chip. Please contact us for further details.

For space critical applications custom design packages, i.e. with 2 or more driver chips in one package, can

be designed at customer request. Please email Quantum Devices, Inc. at qdisales@quantumdev.com

For Stateside information contact...

Quantum Devices, Inc., 112 Orbison St., PO Box 100, Barneveld, WI,

53507

●Tele: (608) 924-3000 ●Fax: (608) 924-3007 ●URL: www.quantumdev.com ●Email: qdisales@quantumdev.com

OL2068

Industrial 30 Volt 4-Channel Differential Power Line Driver - Short Circuit Proof -

Pin Name I\O Type

Function

1

2

3

4

5

6

7

8

9

A IN

GND

A

INPUT

GROUND

OUTPUT

Input Driver A

Ground

Buffered tri-state Output Driver A

Inverted tri-state Output Driver A

A-

A IN

GND

A

V_CCD

D IN

GND

D

1

2

3

4

5

6

7

8

9

10

20

19

18

17

16

15

14

13

12

11

V_CCI

B-

SUPPLY out 5V internal regulated voltage

OUTPUT

GROUND

INPUT

Inverted tri-state Output Driver B

Buffered tri-state Output Driver B

Ground

B

GND

B IN

A-

Input Driver B

V_CCI

B-

B

D-

Low active Output signal for

thermal shut down and under-

voltage status

10

MON

OUTPUT

ENA

C-

11

12

13

14

C IN

GND

C

INPUT

GROUND

OUTPUT

Input Driver C

Ground

GND

B IN

MON

C

Buffreed tri-state Output Driver C

Inverted tri-state Output Driver C

GND

C IN

C-

Low active enable Pin for all tri-

state Output Drivers

15

ENABLE

INPUT

16

17

18

19

20

D-

D

OUTPUT

GROUND

INPUT

Inverted tri-state Output Driver D

Buffered tri-state Output Driver D

Ground

OL2068

GND

D IN

V_CCD

Input Driver D

SUPPLY in 4.5 V to 30V Driver Voltage

4,5 - 30 V

V

CCD

A IN

GND

A

1

2

3

4

5

6

7

8

9

10

20

19

18

17

16

15

14

13

12

11

D IN

GND

D

100nf

A-

5V stabilized

V

CCI

D-

B-

B

ENA

C-

GND

B IN

MON

C

100nf

GND

C IN

Note on OL2068:

The 4 GND pins do not need to be connected to electrical GND simultaneously. One of them tied to GND is enough. However - for

heavy driving of loads it is recommended to tie all four pins to GND.

The internal voltage regulator (Pin 5,Vcci) can be used for external loads (5mA max.) as well. Please make sure, that a decoupling

capacitor of min. 100nf is connected to Vcci. If, due to heavy loads, the internal voltage supply will be rippled, please increase the

capacitor value to stabalize Vcci.

For Stateside information contact...

Quantum Devices, Inc., 112 Orbison St., PO Box 100, Barneveld, WI,

53507

●Tele: (608) 924-3000 ●Fax: (608) 924-3007 ●URL: www.quantumdev.com ●Email: qdisales@quantumdev.com

OL2068

Industrial 30 Volt 4-Channel Differential Power Line Driver - Short Circuit Proof -

Functional description

The main contents of this new CMOS power line driver are four identical blocks (systems A to D) with each a CMOS/TTL Schmitt Trigger Input and

high power differential buffered and inverted outputs.

With the low active ENABLE pin it is possible to switch off all eight outputs (high-impedance state), thus this driver can be used in industrial bus

systems.

In some rare applications it might be useful to disable the over temperature shutdown. This can be done by setting the ENABLE pin to a level

between >7,5 V and <12 V. In this case the whole protection of the IC is disabled ! In case of any short circuits or thermal overdrive, the driver might

be destroyed !

An internal ultra low drop voltage regulator with typical 5.0 V supplies the internal logic to reduce power dissipation. Some applications require

additional 5V ( i.e. for an LED driver in an optical encoder). This voltage can be sourced out of the line driver internal voltage regulator ( 5mA max.).

The over-temperature protection block is placed in the center of the chip. The thermal shutdown will be activated, when a overload condition (i.e.

short circuit) has exceeded the over-temperature detection threshold.

In this case automatically all output drivers are switched off and (ET2068) an error signal is activated on a monitor pin. After the chip has cooled

down ( a few milliseconds ) it automatically re-activates all functions and switches the MON output high again. In case the short circuit is still

present, it switches off again and the same cycle starts from the beginning.

By using this line driver, the field returns of systems, which are accidentally shorted and blown by the end users, are dramatically reduced.

Power supply

The internal power supply is designed as a voltage regulator with a typical output voltage V_CCI= 5.0 V. The minimal voltage drop across the regulator

transistors could not be lower than 0.3 V. In order to decouple V_CCIit has to be connected to an external capacitor of 100nF.

The V_CCIpin could be used as a reference voltage for LED drivers or is able to supply other external devices like sensors at a maximum current of

I_CCIE= 5.0 mA. Please keep in mind, that by using this voltage regulator it will generate additional power dissipation = heat.

Under-voltage reset

If the system is switched on, the status of the line driver is, for a few microseconds, undefined. The same happens, if heavy power supply failures

occur. To avoid wrong data transmitted, there is a supply voltage watchdog implemented.

The under-voltage reset block contains a comparator. The voltage V_CCIwill be always compared with a reference voltage, provided by an internal

bandgap cell.

If after a filter time (t_FILLVR ~ 5 s) V_CCIdrops below the typical voltage threshold of 3.5 V the output signal of this block switches off all output drivers

to the high-impedance state until minimum 3.6 V are reappearing. In case of such a system fault also the output MON generates an error signal. This

(inverted) signal can also be used as a "system ready" signal.

ESD / EMI

The chip is an ESD sensitive device and should be handled according to guideline EN100015 / part 1 (“The Protection of ESD Sensitive Devices”).

All pins are ESD protected according to ESD standard MIL883, method 3015.7 (human body model). Unused Inputs should be connected to GND,

as well as the pin ENABLE in case this function is not used. This will reduce the quiescent supply current.

Heatlink

For higher power dissipation, the part can be ordered with an added heatlink underneath the IC. This non conductive heatlink automatically gives an

excellent thermal contact to the PCB, thus the driving capability can be upgraded up to 20% more driving current. No specific user assembly routines

required - just solder the IC to your PCB and the heatlink is automatically making contact with the circuit board.

Life support clause

The schematics and in general the linedrivers are not intended for use in life support appliances, critical components or systems without the express

written consent of Optolab Microsystems GmbH. As used herein:

1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and

whose failure to perform, when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in

a significant injury to the user.

2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure

of the life support device or system, or to affect its safety or effectiveness.

For Stateside information contact...

Quantum Devices, Inc., 112 Orbison St., PO Box 100, Barneveld, WI,

53507

●Tele: (608) 924-3000 ●Fax: (608) 924-3007 ●URL: www.quantumdev.com ●Email: qdisales@quantumdev.com

OL2068

Industrial 30 Volt 4-Channel Differential Power Line Driver - Short Circuit Proof -

Functional blocks

Figure 8

V_CCD

V_CCI

High voltage Data Inputs

All Data input pins with Schmitt trigger characteristics on CMOS/TTL

level are protected against voltage overshoot up to 30 V. The input

circuity will be powered by an internal low drop voltage regulator.

Data Input

Figure 9

V

CCD

Pegel

shifter

Push-pull Data outputs

Tristate

For minimizing cross talk and maintaining the very high switching

speed each driver stage has it’s own level shift pre-driver. Therefore

the digital waveform characteristics has a superior frequency re-

sponse.

Data

Output

Over-temperature protection

An over-temperature detection and protection is implemented to prevent the output drivers from overheating and being destroyed.

If the temperature increases with growing power dissipation and the junction temperature exceeds the absolute maximum value with

O

typical T_JOP~ 165 C then this condition causes the thermal shutdown by switching off all output drivers to their high-impedance state.

After cooling down below the release point the driver will continue this operation. Upgrading power dissipation can be achieved by

using our heatlink option.

The active over-temperature detection status will be also provided on the MON pin as low level.

Over-temperature disable

The only way to realize this function without a seperate pin is the use of a special voltage range on the ENABLE pin.

V_CCI

Figure 10

ENABLE Input with temp. disable signal generation

_

ENABLE

The implementation of one voltage threshold above the valid

funtional range allows ther realization of an additional func-

tion. Again - by using this mode the line driver is no longer

protected! If there is a voltage > 7,5V and < 12V applied to

the ENABLE pin, the temperature shutdown will be desabled.

COMP

Test Mode 2

Test Mode 1

COMP

For Stateside information contact...

Quantum Devices, Inc., 112 Orbison St., PO Box 100, Barneveld, WI,

53507

●Tele: (608) 924-3000 ●Fax: (608) 924-3007 ●URL: www.quantumdev.com ●Email: qdisales@quantumdev.com

OL2068

Industrial 30 Volt 4-Channel Differential Power Line Driver - Short Circuit Proof -

Line driver applications

For differential line driver applications it is recommended to use shielded twisted pair cable. Unfortunately this type

of cable is not widely used. A more realistic load circuit is therefore shown in Figure 13. A long cable model is

shown in Figure 14.

V_CCD

V_CC

Figure 12

Twisted Pair transmission lines

Output+

Output-

twisted pair line

Input

1/4

OL2068

Output

V_CCD

V_CCD/ R_L~ 30 mA

C_{L_DIF}= 0.5 * C_L

Figure 13

Load circuit for differential transmission Lines

R_L

C_{L_DIF}

Output+

Output-

RL

120 W 350 W 700 W

12 V 24 V

C_L

R_L

C_L

R_L

VCCD 5 V

The variables for Figure 13 to meet the push-pull output drive DC characteristics are: C_L= 1000 pF, C_{L DIF}= 500 pF

Figure 14

Long cable model (100 m/300 ft) for

2nF

1nF

2nF

1nF

2nF

1nF

2nF

1nF

2nF

differential transmission lines

A

AO

BO

1

Condition

Parameter

1nF

R_L

V_CCD

4.5 V

30 V

I_LOAD

B

1

2nF

225 W

1 kW

20 mA

30 mA

For easy application engineering there is a demo board available. Please call your representative for

details.

For driving heavy loads, the line drivers may be used in parallel.

*Optolab Microsystems GmbH keeps the right to change and update this specification at any time without giving notice.

For Stateside information contact...

Quantum Devices, Inc., 112 Orbison St., PO Box 100, Barneveld, WI,

53507

●Tele: (608) 924-3000 ●Fax: (608) 924-3007 ●URL: www.quantumdev.com ●Email: qdisales@quantumdev.com


型号：	OL2068
厂家：	ETC
描述：	Industrial 30 Volt 4-Channel Differential Power Line Driver 工业30伏4通道差分功耗线路驱动器驱动器
文件：	总9页 (文件大小：426K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

OL2068 [ETC]

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