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OL2068
Industrial 30 Volt 4-Channel Differential Power Line Driver - Short Circuit Proof Applications * Industrial encoder interfacing * Industrial sensor interfacing * Proximity switches * Industrial controllers * Light barriers
Features * 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
Ultra small package TSSOP 20
Voltage regulator
5V , 5mA out
General Description
The OL2068 is an industrial power line driver and contains four identical short circuit proof differential line drivers up to 30 Volts driver supply with a joint enable function. 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. The very small outline TSSOP package gives excellent thermal power dissipation, thus the usage in space limited applications is easy.
Tristate enable / disable Thermal shutdown disable
CMOS / TTL Data input
Differential Output A Output ADifferential Output B Output BDifferential Output C Output CDifferential Output D Output D-
CMOS / TTL Data input
CMOS / TTL Data input
CMOS / TTL Data input
Protection logic controller
short circuit shut down Tristate and thermal logic control Undervoltage and power up reset Transient and EMI protection
Error signal out
For Stateside information contact...
Quantum Devices, Inc., 112 Orbison St., PO Box 100, Barneveld, WI, 53507
qTele: (608) 924-3000 qFax: (608) 924-3007 qURL: www.quantumdev.com qEmail: 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
DC supply voltage DC input voltage DC input current Output voltage Driver output current (see cable model) Storage and operating temperature range Junction temperature Lead temperature Power dissipation: OL7272 SOIC16NB: Rthj-a=111.8 K/W OL2068 TSSOP20: Rthj-a= 81.4 K/W
Symbol Condition
VCCD VIN IIn VOUT IOUT TSTGOP TJ TL PD soldering, 10s still air, TA=85C, TJ=150C pulse peak/average
Min
-0.3 -0.3
Max
36.0 VCC+0.3 10
Unit
V V mA V mA C C C
-0.3
VCC+0.3 1500/100
-55
+125 +1501 +2602
581 798
mW mW
Table 2 Recommended Operating Conditions
Parameter
DC supply voltage DC data input voltage DC enable input voltage Data output voltage TMON output voltage Driver output current (see cable model) Operating ambient temperature range Junction temperature range (lifetime)
Symbol
VCCD VIND VINEN3 VOUTD VOUTTM IOUT4 TA5 TJ
Condition
Min
4.5 0 0 0 0
Max
30.0 VCCD 5.5 VCCD VCCI 100
Unit
V V V V V mA C C
-40 -55
+100 +125
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
qTele: (608) 924-3000 qFax: (608) 924-3007 qURL: www.quantumdev.com qEmail: qdisales@quantumdev.com
OL2068
Industrial 30 Volt 4-Channel Differential Power Line Driver - Short Circuit Proof Table 3 DC Characteristics (VCCD = 12.0 V, TA = 25 C, unless otherwise noted)
Paramter Schmitt trigger inputs section Data input hysteresis Data input positive going threshold Data input negative going threshold Enable input hysteresis Enable input pos. going threshold Enable input neg. going threshold Data input leakage current -Low V HYSD V TH+D V TH-D V HYSEN V TH+EN V TH-EN I ILD I IHD I ILEN I IHEN ENABLE <= 0.8 V ENABLE <= 0.8 V 0.8 -10.0 -10.0 -10.0 -10.0 V IL to VIH and V IH to VIL, ENABLE <= 0.8 V ENABLE <= 0.8 V ENABLE <= 0.8 V V IL to VIH and V IH to VIL, 0.8 0.2 0.2 0.5 1.7 1.2 0.5 1.7 1.2 +10.0 +10.0 +10.0 +10.0 2.4 2.4 V V V V V V A A A A Symbol Condition Min Typ Max Unit
-High Enable input leakage current -Low -High Push-pull output drive section - Low side switch outputs6 Low level output voltage
V OLB V OLT
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 V CCD = 30.0 V, ENABLE >= 2.4 V -10.0
0.3 0.4 13
0.5 0.5 20 +10.0
V V
Output resistance High-impedance output leakage current - High side switch ouptuts High level output voltage
6
R DSON I OZ
A
V OHB V OHT
V CCD = 4.75 V, I LOAD = -20mA, ENABLE <=0.80 V V CCD = 30V, ILOAD = 30mA, ENABLE <=0.8 V I LOAD = 30mA V CCD = 30.0 V, ENABLE >= 2.4 V
4.2 29.2
V CCD -0.4 V CCD -0.6 20 30 +10.0
V V
Output resistance High-impedance output leakage current -MON output
8
R DSON I OZ
-10.0
A
Low level output voltage High level output voltage Supply parameters section V CCD supply current
9
V OL V OH
I LOAD = 2.0 mA I LOAD = 2.0mA V CCI -0.8
0.4
V V
I DB(en) I DT(en) I DB(dis) I DT(dis)
V CCD = 5.0 V, V CCD = 30.0 V, V CCD = 5.0 V, V CCD = 30.0 V, I CCIE = 5.0 mA
ENABLE <= 0.8 V ENABLE <= 0.8 V ENABLE >= 2.4 V ENABLE >= 2.4 V 4.5
1.5 1.5 1.5 1.5 5.0 0.2
5.0 5.0 3.0 3.0 5.5
mA mA mA mA V mA
Internal supply voltage 10 Quiescent current Current from internal voltage regulator to supply external devices Low voltage reset section Hysteresis for under-voltage reset
V CCI11 I CCQ12 I CCIE13
V IN = 2.4 V OR 0.8 V
5.0
mA
V HYSLVR V TH-LVR V TH+LVR t FILLVR 14 3.3 3.4
0.1 3.5 3.6 5 3.7 3.8
V V V s
Under-votlage reset negative going threshold (active) Under-voltage reset positive going threshold (inactive) Under-voltage reset filter time Over-temperature protection section Over-temp. operate point (junction) Over-temp. release point (junction)
T JOP T JRP +125
+165 +135
+185
C C
Either the low or high side switch is active at a time. Values will not be part of the production test but guaranteed by design. 8 Output MON external driving current up to 4mA possible - but using this limits the thermal power budget! 9 Measured without external load on VCCI pin, all outputs open. 10 For decoupling VCCI please connect this output with a 100nf capacitor to GND 11 Depends on supply voltage VCCD, VCCI could be not higher than VCC - 0.3 V. 12 This is measured per input with all other inputs held at VCCI or GND. 13 Limited by power dissipation, high ICCI current with growing VCCD voltage generates heat, thus the driving limit can be reached earlier. 14 Value will not be part of the production test but guaranteed by design.
7
6
For Stateside information contact...
Quantum Devices, Inc., 112 Orbison St., PO Box 100, Barneveld, WI, 53507
qTele: (608) 924-3000 qFax: (608) 924-3007 qURL: www.quantumdev.com qEmail: qdisales@quantumdev.com
OL2068
Industrial 30 Volt 4-Channel Differential Power Line Driver - Short Circuit Proof Table 4 AC Characteristics (VCCD = 12.0 V, TA = 25 C, Cable capacitance 1000pF, unless otherwise noted)
Paramter
Disable delay time Enable delay time Propagation delay from 50% point of rising edge of input pulse to zero crossing of differential outputs (see figure 1) Propagation delay from 50% point of falling edge of input pulse to zero crossing of differential outputs (see figure 1) Output rise time (see figure 2)
Symbol
tO F F tO N tPLH
Condition
Min
Typ
100 76
Max
200.0 600.0 200.0 200.0 330.0 280.0 280.0 330.0 200.0 350.0 380.0 200.0 350.0 380.0
Unit
ns ns ns ns ns ns ns ns ns ns ns ns ns ns
VCCD = 5.0 V VCCD = 12.0 V VCCD = 24.0 V CLOAD = 1000 pF VCCD = 5.0 V VCCD = 12.0 V VCCD = 24.0 V CLOAD = 1000 pF VCCD = 5.0 V VCCD = 12.0 V VCCD = 24.0 V CLOAD = 1000 pF VCCD = 5.0 V VCCD = 12.0 V VCCD = 24.0 V CLOAD = 1000 pF VIH
64 74 100 70 80 100 42 110 120 32 62 84
tPHL
tR15
Output fall time (see figure 2)
tF 16
VIH VTH+ Input VIL VOH Output VOL 10% tR tF 10% VTH-
50% Input VIL tPLH VOH Output VOL VOH OutputVOL 50% 50%
50%
90%
90%
tPHL
50%
Figure 2
VCCD
Definition of Output Rise and Fall Time
Figure 3
Output+
Input
1/4 OL2068
Output-
AC Test Circuit CL = 1.000pF
50%
Figure 1
CL CL
tPHL
tPLH
Timing diagram with typical asynchronous propagation delays
15
Measured 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
qTele: (608) 924-3000 qFax: (608) 924-3007 qURL: www.quantumdev.com qEmail: qdisales@quantumdev.com
OL2068
Industrial 30 Volt 4-Channel Differential Power Line Driver - Short Circuit Proof Mechanical characteristics
Package Dimensions
TSSOP20(173 mil) Symbol Min D E1 E A A1 b e L 6.40(0,25) 4.30(0,17) 0.05(2) 0.19(7) 0.50(20) Typ 6.40(0,25) 0.65(26) 8 Max 6.60(0,26) 4.50(0,18) 1.20(47) 0.15(6) 0.30(11) 0.75(30) mm(inch) mm(inch) mm(inch) mm(mils) mm(mils) mm(mils) mm(mils) mm(mils)
o
Unit
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
qTele: (608) 924-3000 qFax: (608) 924-3007 qURL: www.quantumdev.com qEmail: qdisales@quantumdev.com
OL2068
Industrial 30 Volt 4-Channel Differential Power Line Driver - Short Circuit Proof Pin
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Name
A IN GND A AV CCI BB GND B IN MON C IN GND C CENABLE DD GND D IN VCCD
I\O Type
INPUT GROUND OUTPUT OUTPUT SUPPLY out OUTPUT OUTPUT GROUND INPUT OUTPUT INPUT GROUND OUTPUT OUTPUT INPUT OUTPUT OUTPUT GROUND INPUT SUPPLY in Ground
Function
Input Driver A
Buffered tri-state Output Driver A Inverted tri-state Output Driver A 5V internal regulated voltage Inverted tri-state Output Driver B Buffered tri-state Output Driver B Ground Input Driver B Low active Output signal for thermal shut down and undervoltage status Input Driver C Ground Buffreed tri-state Output Driver C Inverted tri-state Output Driver C Low active enable Pin for all tristate Output Drivers Inverted tri-state Output Driver D Buffered tri-state Output Driver D Ground Input Driver D 4.5 V to 30V Driver Voltage
A IN GND A AVCCI BB GND B IN MON
1 2 3 4 5 6 7 8 9 10
20 19 18 17 16 15 14 13 12 11
VCCD D IN GND D DENA CC GND C IN
OL2068
V
CCD
4,5 - 30 V
5V stabilized
A IN GND A AV
CCI
100nf
BB GND B IN MON
Note on OL2068:
1 2 3 4 5 6 7 8 9 10
20 19 18 17 16 15 14 13 12 11
D IN GND D DENA CC GND C IN
100nf
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
qTele: (608) 924-3000 qFax: (608) 924-3007 qURL: www.quantumdev.com qEmail: 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 VCCI = 5.0 V. The minimal voltage drop across the regulator transistors could not be lower than 0.3 V In order to decouple VCCI it has to be connected to an external capacitor of 100nF. .
The VCCI pin 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 ICCIE = 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 VCCI will be always compared with a reference voltage, provided by an internal bandgap cell. If after a filter time (tFILLVR ~ 5 s) VCCI drops 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
qTele: (608) 924-3000 qFax: (608) 924-3007 qURL: www.quantumdev.com qEmail: qdisales@quantumdev.com
OL2068
Industrial 30 Volt 4-Channel Differential Power Line Driver - Short Circuit Proof Functional blocks
Figure 8 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 VCCD VCCI VCCI VCCI
Figure 9 Push-pull Data outputs 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 response. Over-temperature protection
Pegel shifter
VCCD
VCCD
Tristate
Data Output
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 typical TJOP 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.
O
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.
VCCI VCCI VCCI
Figure 10 ENABLE Input with temp. disable signal generation The implementation of one voltage threshold above the valid funtional range allows ther realization of an additional function. 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.
ENABLE_
CM OP
Test Mode 2
CM OP
Test Mode 1
For Stateside information contact...
Quantum Devices, Inc., 112 Orbison St., PO Box 100, Barneveld, WI, 53507
qTele: (608) 924-3000 qFax: (608) 924-3007 qURL: www.quantumdev.com qEmail: 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.
Figure 12
Twisted Pair transmission lines
Input
V
CCD
V
CC
Output+
twisted pair line Output
1/4 OL2068
Output-
Figure 13
Load circuit for differential transmission Lines
VCCD
VCCD
VCCD / R L ~ 30 mA CL_DIF = 0.5 * CL
RL Output+
CL_DIF
RL Output-
RL VCCD
120 350 700
CL
5V
12 V
24 V
RL
RL
CL
The variables for Figure 13 to meet the push-pull output drive DC characteristics are: CL = 1000 pF, CL DIF = 500 pF
Figure 14
Long cable model (100 m/300 ft) for differential transmission lines
A 2nF 1 1nF B 1 2nF 1 1 2nF 1 2nF 2nF 1 2nF 1 1nF 2nF 1 1nF 2nF 1 1nF 2nF 1 1nF RL BO 2nF AO
Parameter RL 225 1 k
Condition VCCD 4.5 V 30 V ILOAD 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
qTele: (608) 924-3000 qFax: (608) 924-3007 qURL: www.quantumdev.com qEmail: qdisales@quantumdev.com

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