IL422-3V

IL422-3V ETC | Alldatasheet

Document overview

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Technical content

RHOPOINT COMPONENTS Hurst Green, Oxted, Surrey RH8 9AX UK Telephone: +44 (0) 870 608 1188 Fax: +44 (0) 870 241 2255 Internet: www.rhopointcomponents.com Functional Diagram Features

• 3.3 V Input Supply Compatible
• 2500 VRMS Isolation (1 min)
• 25 ns Propagation Delay
• 25 MBaud Data Rate
• 1 ns Pulse Skew (typ)
• ±60 mA Driver Output Capability
• Thermal Shutdown Protection
• Meets or Exceeds EIA 422-B, EIA 485-A and ITU Recommendation V11
• -40°C to +85°C Temperature Range
• 16 Pin SOIC Package
• PROFIBUS International Component Recognition
• UL 1577 Approval Pending
• IEC 61010-1 Approval Pending

Applications

Multi-point or Multi-drop Transmission on Long Bus Lines in Noisy Environments

Description

The IL422-3V is a galvanically isolated, high speed differential driver and receiver pair, designed for bidirectional data communication on balanced transmission lines. Isolation is achieved through patented * Isoloop® technology. The IL422-3V is the first isolated RS-422 interface available in a standard 16 pin SOIC package, which meets the ANSI Standards EIA/TIA-422-B and RS485. The IL422-3V has current limiting and thermal shutdown features to protect against output short circuits and bus contention situations where these may cause excessive power dissipation. Isolated 3Volt RS422/RS485 Interface Function Table VID1 VID2 (Y-Z) (A-B) DE RE ISODE R D MODE X ≥ 0.2V X L X H X Receive X ≤ −0.2V X L X L X Receive -7<VID1<12 -7<VID2<12 X H X Z X Receive/Drive ≥ 1.5 X H L H H H Drive ≤−1.5 X 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 IL422-3V . If requesting tape and reel, please specify as IL422-3V TR. IL422-3V ISOLOOP®

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 5.5 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'') IL422 II III 400 V RMS 9 IEC61010-1 TUV Certificate Numbers: Pending Classification as Table 1. UL 1577 Component Recognition program. File # Pending Rated 2500Vrms for 1min. RHOPOINT COMPONENTS Hurst Green, Oxted, Surrey RH8 9AX UK Telephone: +44 (0) 870 608 1188 Fax: +44 (0) 870 241 2255 Internet: www.rhopointcomponents.com IL422-3V 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 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

RHOPOINT COMPONENTS Hurst Green, Oxted, Surrey RH8 9AX UK Telephone: +44 (0) 870 608 1188 Fax: +44 (0) 870 241 2255 Internet: www.rhopointcomponents.com IL422-3V 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

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. IL422-3V ISOLOOP® RHOPOINT COMPONENTS Hurst Green, Oxted, Surrey RH8 9AX UK Telephone: +44 (0) 870 608 1188 Fax: +44 (0) 870 241 2255 Internet: www.rhopointcomponents.com 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 ±10 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 Supply 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 25 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 25 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

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/Y with respect to the inverting terminal B/Z. 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 and TA = 25°C. 6. The minimum V OD2 with a 100Ω load is either ½VOD1 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. RHOPOINT COMPONENTS Hurst Green, Oxted, Surrey RH8 9AX UK Telephone: +44 (0) 870 608 1188 Fax: +44 (0) 870 241 2255 Internet: www.rhopointcomponents.com IL422-3V ISOLOOP®

RHOPOINT COMPONENTS Hurst Green, Oxted, Surrey RH8 9AX UK Telephone: +44 (0) 870 608 1188 Fax: +44 (0) 870 241 2255 Internet: www.rhopointcomponents.com 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 AB Bus

4 RE Read Data Enable (If RE is high, R is High Impedence)

5 DE Drive Enable

6 D Data Input to YZ 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 applications where the

state of the drive enable node needs to be monitored

11 Y ‘Y’ Bus (Drive — True)

12 Z ‘Z’ Bus (Drive — Inverse)

13 B ‘B’ Bus (Receive — Inverse)

14 A ‘A’ Bus (Receive — True)

15 GND 2 Output Power Supply Return

16 V DD2 Output Power Supply

Connected Internally: Pins 2 & 8 Pins 9 & 15 IL422-3V ISOLOOP®

RHOPOINT COMPONENTS Hurst Green, Oxted, Surrey RH8 9AX UK Telephone: +44 (0) 870 608 1188 Fax: +44 (0) 870 241 2255 Internet: www.rhopointcomponents.com IL422-3V (0.3'' SOIC-16 Package) IR Soldering Profile IL422-3V ISOLOOP® Recommended profile shown. Maximum temperature allowed on any profile is 260° C.