IL485-3V ETC | Alldatasheet

Document overview

  • Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
  • PDF pages: 8

Technical content

NVE Corporation 11409 Valley View Road Eden Prairie, MN 55344-3617 USA Telephone: (952) 829-9217 Fax: (952) 829- 9189 Internet: www.isoloop.com IL485-3V ISOLOOP® Functional Diagram Features

  • 3.3 V Input Supply Compatible
  • 2500 VRMS Isolation (1 min)
  • 25 ns Maximum Propagation Delay
  • 35 MBaud Data Rate
  • 1 ns Pulse Skew (typ.)
  • Designed for Multi-point Transmission on Long Bus Lines in Noisy Environments
  • ±60 mA Driver Output Capability
  • Thermal Shutdown Protection
  • Meets or Exceeds ANSI RS-485 and ISO 8482:1987 (E)
  • -40°C to +85°C Temperature Range
  • PROFIBUS International Component Recognition
  • 16 Pin SOIC Package
  • UL1577 Approval Pending
  • IEC 61010-1 Approval Pending

Applications

  • PROFIBUS/RS485
  • RS-485 Systems
  • Multiple Data Point Transmission

Description

The IL485-3V is a galvanically isolated, high speed differential bus transceiver, designed for bidirectional data communication on balanced transmission lines. Isolation is achieved through patented * Isoloop® technology. The IL485-3V is thefirst isolated RS-485 interface available in a standard 16 pin SOIC package, which meets the ANSI Standards EIA/TIA-422-B and RS485 and is compatible with 3.3V input supplies. The IL485-3V has current limiting and thermal shutdown features to protect against output short circuits and bus contention situations where these may cause excessive power dissipation. With 1 nsec pulse skew and 16 nsec propagation delay, the IL485 is ideal for PROFIBUS applications. Isolated RS485-3V Interface Function Table VID (A-B) DE RE ISODE R D MODE ≥ 0.2V L L L H X Receive ≤ −0.2V L L L L X Receive -7<VID<12 X H X Z X Receive/Drive ≥ 1.5 H L H H H Drive ≤−1.5 H L H L L Drive Open L L L H X Receive H= High Level, L= Low Level, X= Irrelevant, Z= High Impedance Isoloop® is a registered trademark of NVE Corporation * US Patent number 5,831,426; 6,300,617 and others

Ordering Information

Order as IL485-3V . If requesting tape and reel, please specify as IL485-3VTR.

NVE Corporation 11409 Valley View Road Eden Prairie, MN 55344-3617 USA Telephone: (952) 829-9217 Fax: (952) 829 -9189 Internet: www.isoloop.com IL485-3V ISOLOOP® Recommended Operating Conditions Parameters Symbol Min. Max. Units Supply V oltage VDD1 3.0 5.5 V VDD2 4.5 5.5 Input V oltage at any bus terminal V I 12 V (separately or common mode) VIC -7 High-Level Digital Input V oltage (VDD1=3.3 V) VIH 2.4 V (VDD1=5.0 V) 3.0 Low-Level Digital Input V oltage V IL 0.8 V Differential Input V oltage(2) VID +12/-7 V High-Level Output Current (Driver) I OH -60 mA High-Level Digital Output Current (Receiver) I OH 8m A Low-Level Output Current (Driver) I OL 60 mA Low-Level Digital Output Current (Receiver) I OL 8m A Operating Free Air Temperature T A -40 85 °C Digital Input Signal Rise and Fall Times t IR,tIF DC Stable Absolute Maximum Ratings Parameters Symbol Min. Max. Units Storage Temperature T S -65 150 oC Ambient Operating Temperature T A -40 85 oC V oltage Range at A or B Bus Pins -7 12 V Supply V oltage(1) VDD1,VDD2 -0.5 7 V Digital Input V oltage -0.5 V DD+ 0.5 V Digital Output V oltage -0.5 V DD+ 0.1 V Continuous Total Power Dissipation 725 mW (25°C) 377 mW (85°C) Maximum Output Current I O 95 mA Lead Solder Temperature (10s) 260 °C ESD 2kV Human Body Model Insulation Specifications Parameter Condition Min. Typ. Max. Units Creepage Distance (External) 8.077 mm Barrier Impedance >10 14 ||7 Ω || pF Leakage Current 240 V RMS 0.2 µA 60Hz Model Pollution Material Max Working Package Type Degree Group Voltage 16–SOIC (0.3'') IL485-3V II III 300 V RMS 9 IEC61010-1 TUV Certificate Numbers: Approval Pending Classification as Table 1.

NVE Corporation 11409 Valley View Road Eden Prairie, MN 55344-3617 USA Telephone: (952) 829-9217 Fax: (952) 829 -9189 Internet: www.isoloop.com IL485-3V ISOLOOP® Driver Section All Specifications are Tmin to Tmax unless otherwise stated. Parameter Symbol Min. Typ. (5) Max. Units Test Conditions Input Clamp V oltage V IK -1.5 V I L=-18mA Output Voltage V O 06 V I O=0 Differential Output V oltage |V OD1| 1.5 6 V I O=0 Differential Output V oltage(6) |VOD2| 1.5 2.5 5 V R L=54Ω Differential Output V oltage V OD3 1.5 5 V V test=-7 to 12V Change in Magnitude of (7) ∆|VOD| ±0.2 V R L=54 or 100Ω Differential Output V oltage Common Mode Output V oltage V OC 3V R L=54 or 100Ω Change in Magnitude of (7) ∆|VOC| ±0.2 V R L=54 or 100Ω Common Mode Output V oltage Output Current(4) IO 1 mA Output Disabled V O=12 -0.8 mA V O=-7 High Level Input Current I IH 10 µAV 1=3.5 V Low Level Input Current I IL -10 µAV 1=0.4 V Short-Circuit Output Current I OS -250 mA V O= -6 -150 V O= 0

250 V O= 8

Supply Current (VDD2= +5V) I DD2 27 34 No Load (Outputs Enabled)(VDD1= +5V) I DD1 51 0 m A (VDD1= +3.3V) I DD1 3.2 7 Switching Characteristics Parameter Symbol Min. Typ. (5) Max. Units Test Conditions Maximum Data Rate 35 Mbd R L=54Ω, CL=50pF Differential Output Delay Time t D(OD)1 6 2 5 n s R L=54Ω, CL=50pF Pulse Skew(10) tSK(P) 1 6 ns R L=54Ω, CL=50pF Differential Output Transition Time t T(OD) 8 10 ns R L=54Ω, CL=50pF Output Enable Time To High Level t PZH 31 65 ns R L=54Ω, CL=50pF Output Enable Time To Low Level t PZL 22 35 ns R L=54Ω, CL=50pF Output Disable Time From High Level t PHZ 28 50 ns R L=54Ω, CL=50pF Output Disable Time From Low Level t PLZ 16 32 ns R L=54Ω, CL=50pF Skew Limit(3) tSK(LIM)2 8 n s R L=54Ω, CL=50pF

NVE Corporation 11409 Valley View Road Eden Prairie, MN 55344-3617 USA Telephone: (952) 829-9217 Fax: (952) 829 -9189 Internet: www.isoloop.com IL485-3V ISOLOOP® Receiver Section All Specifications are Tmin to Tmax unless otherwise stated. Parameter Symbol Min. Typ. (5) Max. Units Test Conditions Positive-going Input Threshold V oltage V IT+ 0.2 V V O = 2.7V , Io= - 0.4mA Negative-going Input Threshold V oltage VIT- –0.2 V VO = 0.5V , Io= 8mA Hysteresis V oltage (VIT+ - VIT-) Vhys 60 mV High Level Digital Output V oltage VOH VDD – 0.2 V VID= 200mV , IOH = -20µA Low Level Digital Output V oltage V OL 0.2 V V ID= -200mV , IOL = 20µA High-impedance-state output current I OZ ±20 µAV O = 0.4 to (VDD2 - 0.5) V Line Input Current(8) II 1 mA Other Input (11) = 0V VI=12V -0.8 V I= –7V Input Resistance r I 50 k Ω SuSupply Current (V DD2= +5V) I DD2 27 34 No Load (Outputs Enabled)(VDD1= +5V) I DD1 51 0 m A (VDD1= +3.3V) I DD1 3.2 7 Switching Characteristics @ 5V Parameter Symbol Min. Typ. (5) Max. Units Test Conditions Maximum Data Rate 35 Mbd R L=54Ω, CL=50pF Propagation Time(9) tPD 24 32 ns V O=-1.5 to 1.5V , CL=15pF Pulse Skew(10) tSK(P) 1 6 ns V O=-1.5 to 1.5V , CL=15pF Skew Limit(3) tSK(lim) 2 8 ns R L=54Ω, CL=50pF Output Enable Time To High Level t PZH 17 24 ns C L=15pF Output Enable Time To Low Level t PZL 30 45 ns C L=15pF Output Disable Time From High Level t PHZ 30 45 ns C L=15pF Output Disable Time From Low Level t PLZ 18 27 ns C L=15pF Switching Characteristics @ 3.3V Parameter Symbol Min. Typ. (5) Max. Units Test Conditions Maximum Data Rate 35 Mbd R L=54Ω, CL=50pF Propagation Time(9) tPD 27 32 ns V O=-1.5 to 1.5V , CL=15pF Pulse Skew(10) tSK(P) 2 6 ns V O=-1.5 to 1.5V , CL=15pF Skew Limit(3) tSK(lim) 4 8 ns R L=54Ω, CL=50pF Output Enable Time To High Level t PZH 20 24 ns C L=15pF Output Enable Time To Low Level t PZL 33 45 ns C L=15pF Output Disable Time From High Level t PHZ 33 45 ns C L=15pF Output Disable Time From Low Level t PLZ 20 27 ns C L=15pF Electrostatic Discharge Sensitivity This product has been tested for electrostatic sensitivity to the limits stated in the specifications. However, NVE recommends that all integrated circuits be handled with appropriate care to avoid damage. Damage caused by inappropriate handling or storage could range from performance degradation to complete failure.

NVE Corporation 11409 Valley View Road Eden Prairie, MN 55344-3617 USA Telephone: (952) 829-9217 Fax: (952) 829 -9189 Internet: www.isoloop.com IL485-3V ISOLOOP® Notes: 1. All V oltage values are with respect to network ground except differential I/O bus voltages. 2. Differential input/output voltage is measured at the noninverting terminal A with respect to the inverting terminal B. 3. Skew limit is the maximum difference in any two channels in one device. 4. The power-off measurement in ANSI Standard EIA/TIA-422-B applies to disabled outputs only and is not applied to combined inputs and outputs. 5. All typical values are at V DD1,VDD2 = 5V or VDD1= 3.3 V and TA = 25°C. 6. The minimum V OD2 with a 100Ω load is either ½ VOD1 or 2V , whichever is greater. 7. ∆|VOD| and ∆|VOC| are the changes in magnitude of V OD and VOC, respectively, that occur when the input is changed form one logic state to the other. 8. This applies for both power on and power off, refer to ANSI standard RS-485 for exact condition. The EIA/TIA-422-B limit does not apply for a combined driver and receiver terminal. 9. Includes 8 ns read enable time. Maximum propagation delay is 25 ns after read assertion. 10. Pulse skew is defined as the |t PLH -tPHL| of each channel. Application Notes: Power Consumption Isoloop devices achieve their low power consumption from the manner by which they transmit data across the isolation barrier. By detecting the edge transitions of the input logic signal and converting these to narrow current pulses a magnetic field is created around the GMR Wheatstone bridge. Depending on the direction of the magnetic field, the bridge causes the output comparator to switch following the input logic signal. Since the current pulses are narrow, about 2.5ns wide, the power consumption is independent of mark-to-space ratio and solely dependent on frequency. This has obvious advantages over optocouplers whose power consumption is heavily dependent on its on-state and frequency. The approximate power supply current per channel for Power Supplies It is recommended that low ESR ceramic capacitors be used to decouple the supplies. Both V DD1 and VDD2 should be bypassed with 47 nF capacitors. These should be placed no further than 1 cm from the device pins for proper operation. In addition, V DD2 should have a 10 µF tantalum capacitor connected in parallel with the 47 nF capacitor.

ISOLOOP® Pin Configuration Pin Description Pin Mnemonic Description 1V DD1 Input Power Supply

2 GND 1 Input Power Supply Ground Return

3 R Output Data from Bus

4 RE Read Data Enable (if RE is high, R=high impedance)

5 DE Drive Enable

6 D Data Input to Bus

7 nc No Internal Connection

8 GND 1 Input Power Supply Ground Return

9 GND 2 Output Power Supply Ground Return

10 ISODE Isolated DE Output for use in Profibus applications where the

state of the drive enable node needs to be monitored 11 nc No Internal Connection

12 A ‘A’ Bus Connection to RS485 (True)

13 B ‘B’ Bus Connection to RS485 (Inverse)

14 nc No Internal Connection

15 GND 2 Output Power Supply Return

16 V DD2 Output Power Supply

Connected Internally: Pins 2 & 8 Pins 9 & 15 NVE Corporation 11409 Valley View Road Eden Prairie, MN 55344-3617 USA Telephone: (952) 829-9217 Fax: (952) 829 -9189 Internet: www.isoloop.com

ISOLOOP® NVE Corporation 11409 Valley View Road Eden Prairie, MN 55344-3617 USA Telephone: (952) 829-9217 Fax: (952) 829 -9189 Internet: www.isoloop.com IL485-3V (0.3'' SOIC-16 Package) IR Soldering Profile Recommended profile shown. Maximum temperature allowed on any profile is 260° C.

11409 Valley View Road

Eden Prairie, MN 55344-3617 USA Telephone: (952) 829-9217 Fax: (952) 829-9189 Internet: www.nve.com e-mail: isoinfo@nve.com About NVE An ISO 9001 Certified Company NVE Corporation is a high technology components manufacturer having the unique capability to combine leading edge Giant Magnetoresistive (GMR) materials with integrated circuits to make high performance electronic components. Products include Magnetic Field Sensors, Magnetic Field Gradient Sensors (Gradiometer), Digital Magnetic Field Sensors, Digital Signal Isolators and Isolated Bus Transceivers. NVE is a leader in GMR research and in 1994 introduced the world’s first products using GMR material, a line of GMR magnetic field sensors that can be used for position, magnetic media, wheel speed and current sensing. NVE is located in Eden Prairie, Minnesota, a suburb of Minneapolis. Please visit our Web site at www.nve.com or call 952-829-9217 for information on products, sales or distribution. The information provided by NVE Corporation is believed to be accurate. However, no responsibility is assumed by NVE Corporation for its use, nor for any infringement of patents, nor rights or licenses granted to third parties, which may result from its use. No license is granted by implication, or otherwise, under any patent or patent rights of NVE Corporation. NVE Corporation does not authorize, nor warrant, any NVE Corporation product for use in life support devices or systems or other critical applications. The use of NVE Corporation’ s products in such applications is understood to be entirely at the customer’ s own risk. Specifications shown are subject to change without notice. ISB-DS-001-IL485-3V-A December 2002