IL422-3V ISOLOOP® Isolated 3Volt RS422/RS485 Interface Features Functional Diagram · 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 Function Table VID1 VID2 (Y-Z) (A-B) X ≤−1.5 MODE ≥ 0.2V X L X H X Receive ≤ −0.2V X L X L X Receive X H X Z X Receive/Drive X H L H H H Drive X Open H L H L Drive L L L H X X -7<VID1<12 -7<VID2<12 ≥ 1.5 DE RE ISODE R D L Receive H= High Level, L= Low Level, X= Irrelevant, Z= High Impedance Ordering Information Order as IL422-3V. If requesting tape and reel, please specify as IL422-3V TR. 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. Isoloop® is a registered trademark of NVE Corporation * US Patent number 5,831,426; 6,300,617 and others 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® Absolute Maximum Ratings Parameters Storage Temperature Symbol TS Min. -65 Max. 150 TA -40 85 o VDD1,VDD2 -7 -0.5 12 7 V V -0.5 -0.5 5.5 VDD+ 0.1 V V 725 377 95 mW (25°C) mW (85°C) mA Ambient Operating Temperature Voltage Range at A or B Bus Pins Supply Voltage(1) Digital Input Voltage Digital Output Voltage Continuous Total Power Dissipation Maximum Output Current IO Lead Solder Temperature (10s) ESD Units o C C 260 2kV Human Body Model °C Insulation Specifications Parameter Creepage Distance (External) Barrier Impedance Leakage Current Condition Min. 8.077 Typ. Max. >1014 ||7 0.2 240 VRMS Units mm Ω || pF µA 60Hz Recommended Operating Conditions Parameters Symbol VDD1 VDD2 Supply Voltage Input Voltage at any bus terminal (separately or common mode) Min. 3.0 Max. 5.5 4.5 5.5 12 -7 VI VIC High-Level Digital Input Voltage (VDD1=3.3 V) (VDD1=5.0 V) Units V V 2.4 VIH V 3.0 Low-Level Digital Input Voltage VIL 0.8 Differential Input Voltage VID ±12 V High-Level Output Current (Driver) IOH -60 mA High-Level Digital Output Current (Receiver) IOH 8 mA Low-Level Output Current (Driver) IOL 60 mA Low-Level Digital Output Current (Receiver) IOL 8 mA Operating Free Air Temperature TA 85 °C (2) Digital Input Signal Rise and Fall Times -40 tIR,tIF V DC Stable IEC61010-1 UL 1577 TUV Certificate Numbers: Pending Classification as Table 1. Component Recognition program. File # Pending Rated 2500Vrms for 1min. Model IL422 Pollution Degree II Material Group III Max Working Voltage 400 VRMS Package Type 16–SOIC (0.3'') 9 2 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 Input Clamp Voltage Output Voltage Differential Output Voltage Differential Output Voltage(6) Differential Output Voltage Change in Magnitude of (7) Differential Output Voltage Common Mode Output Voltage Symbol VIK VO |VOD1| |VOD2| VOD3 ∆|VOD| Change in Magnitude of (7) Common Mode Output Voltage Output Current(4) ∆|VOC| High Level Input Current Low Level Input Current Short-Circuit Output Current Supply Current (VDD2= +5V) (VDD1= +5V) (VDD1= +3.3V) Switching Characteristics Parameter Maximum Data Rate Differential Output Delay Time Pulse Skew(10) Differential Output Transition Time Output Enable Time To High Level Output Enable Time To Low Level Output Disable Time From High Level Output Disable Time From Low Level Skew Limit(3) Min. 0 1.5 1.5 1.5 Typ.(5) Max. -1.5 6 6 5 5 ±0.2 Units V V V V V V Test Conditions IL=-18mA IO=0 IO=0 RL=54Ω Vtest=-7 to 12V RL=54 or 100Ω 3 -1 ±0.2 V RL=54 or 100Ω V RL=54 or 100Ω mA mA µA µA mA 27 5 3.2 1 -0.8 10 -10 -250 -150 250 34 10 7 Output Disabled VO=12 VO=-7 V1=3.5 V V1=0.4 V VO= -6 VO = 0 V O= 8 mA No Load (Outputs Enabled) Typ.(5) Max. 16 1 8 31 22 28 16 2 25 6 10 65 35 50 32 8 Units Mbd ns ns ns ns ns ns ns ns Test Conditions RL=54Ω, CL=50pF RL=54Ω, CL=50pF RL=54Ω, CL=50pF RL=54Ω, CL=50pF RL=54Ω, CL=50pF RL=54Ω, CL=50pF RL=54Ω, CL=50pF RL=54Ω, CL=50pF RL=54Ω, CL=50pF 2.5 VOC IO IIH IIL IOS IDD2 IDD1 IDD1 Symbol Min. 35 tD(OD) tSK(P) tT(OD) tPZH tPZL tPHZ tPLZ tSK(LIM) 3 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® Receiver Section All Specifications are Tmin to Tmax unless otherwise stated. Parameter Symbol Min. Typ.(5) Max. Test Conditions V VO = 2.7V, Io= - 0.4mA V VO = 0.5V, Io= 8mA Positive-going Input Threshold Voltage VIT+ Negative-going Input Threshold Voltage VIT- Hysteresis Voltage (VIT+ - VIT-) Vhys High Level Digital Output Voltage Low Level Digital Output Voltage VOH VOL High-impedance-state output current IOZ II 1 mA Line Input Current(8) 0.2 Units –0.2 60 mV VDD – 0.2 V VID= 200mV, IOH = -20µA 0.2 V VID= -200mV, IOL = 20µA ±10 µA VO = 0.4 to (VDD2 - 0.5) V Other Input(11) = 0V VI=12V -0.8 Input Resistance Supply Current (VDD2= +5V) (VDD1= +5V) (VDD1= +3.3V) rI 50 IDD2 IDD1 IDD1 27 5 3.2 34 10 7 Typ.(5) Max. VI= –7V kΩ mA No Load (Outputs Enabled) Units Mbd Test Conditions RL=54Ω, CL=50pF Switching Characteristics @ 5V Parameter Maximum Data Rate Symbol Propagation Time(9) Min. 25 tPD 24 32 ns VO=-1.5 to 1.5V, CL=15pF Pulse Skew(10) tSK(P) 1 6 ns VO=-1.5 to 1.5V, CL=15pF Skew Limit(3) tSK(lim) 2 8 ns RL=54Ω, CL=50pF Output Enable Time To High Level tPZH 17 24 ns CL=15pF Output Enable Time To Low Level tPZL 30 45 ns CL=15pF Output Disable Time From High Level tPHZ 30 45 ns CL=15pF Output Disable Time From Low Level tPLZ 18 27 ns CL=15pF Typ.(5) Max. Units Mbd Test Conditions RL=54Ω, CL=50pF Switching Characteristics @ 3.3V Parameter Maximum Data Rate Symbol Propagation Time(9) Min. 25 tPD 27 32 ns VO=-1.5 to 1.5V, CL=15pF Pulse Skew(10) tSK(P) 2 6 ns VO=-1.5 to 1.5V, CL=15pF Skew Limit(3) tSK(lim) 4 8 ns RL=54Ω, CL=50pF Output Enable Time To High Level tPZH 20 24 ns CL=15pF Output Enable Time To Low Level tPZL 33 45 ns CL=15pF Output Disable Time From High Level tPHZ 33 45 ns CL=15pF Output Disable Time From Low Level tPLZ 20 27 ns CL=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. 4 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® Notes: Application Notes: 1. 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. All Voltage 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 VDD1,VDD2 = 5V and TA = 25°C. 6. The minimum VOD2 with a 100Ω load is either ½VOD1 or 2V, whichever is greater. 7. ∆|VOD| and ∆|VOC| are the changes in magnitude of VOD 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/TIA422-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 |tPLH -tPHL| of each channel. 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 VDD1 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, VDD2 should have a 10 µF tantalum capacitor connected in parallel with the 47 nF capacitor. 5 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® Pin Configuration Connected Internally: Pins 2 & 8 Pins 9 & 15 Pin Description Pin 1 3 4 5 6 7 8 Mnemonic VDD1 GND1 R RE DE D nc GND1 9 GND2 Output Power Supply Ground Return 10 ISODE 11 12 13 14 15 Y Z B A GND2 Isolated DE Output for use in applications where the state of the drive enable node needs to be monitored ‘Y’ Bus (Drive — True) ‘Z’ Bus (Drive — Inverse) ‘B’ Bus (Receive — Inverse) ‘A’ Bus (Receive — True) Output Power Supply Return 2 16 VDD2 Description Input Power Supply Input Power Supply Ground Return Output Data from AB Bus Read Data Enable (If RE is high, R is High Impedence) Drive Enable Data Input to YZ Bus No Internal Connection Input Power Supply Ground Return Output Power Supply 6 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® IL422-3V (0.3'' SOIC-16 Package) IR Soldering Profile Recommended profile shown. Maximum temperature allowed on any profile is 260° C. 7 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