FEATURES Dual transceivers for RS-422 ESD protection on bus input/output pins ±15 kV human body model (HBM) ±8 kV IEC 61000-4-2, contact discharge ±8 kV IEC 61000-4-2, air discharge Complies with TIA/EIA-422-B and ITU-T recommendation V.11 Open-circuit fail-safe Suitable for 5 V power supply applications Low supply current operation: 9 mA maximum Low driver output skew Receiver input impedance: 30 kΩ Receiver common-mode range: −7 V to +7 V Power-up/power-down without glitches 16-pin TSSOP package Operating temperature range: −40°C to +85°C APPLICATIONS FUNCTIONAL BLOCK DIAGRAM VCC ADM4168E DI1 Y1 B1 R1 D1 Z1 A1 RO1 DE1 DE2 RO2 Z2 A2 R2 D2 B2 Y2 DI2 GND 10820-001 Data Sheet ±15 kV ESD Protected Dual RS-422 Transceiver ADM4168E Figure 1. RS-422 interfaces High data rate motor control Single-ended-to-differential signal conversion Point-to-point and multidrop transmission systems GENERAL DESCRIPTION The ADM4168E has dual RS-422 transceivers suitable for high speed communication on point-to-point and multidrop transmission lines. The ADM4168E is designed for balanced transmission lines and complies with TIA/EIA-422-B. The differential driver outputs and receiver inputs feature electrostatic discharge circuitry that provides protection up to ±15 kV HBM and ±8 kV IEC 61000-4-2 (contact and air discharge). The receivers of the ADM4168E contain a fail-safe feature that results in a logic high output state if the inputs are unconnected (floating). The ADM4168E is fully specified over the commercial and industrial temperature ranges and is available in a 16-pin TSSOP package. The ADM4168E operates from a single 5 V power supply. Excessive power dissipation caused by bus contention or output shorting is prevented by short-circuit protection circuitry. Shortcircuit protection circuits limit the maximum output current to 150 mA during fault conditions. Rev. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2012 Analog Devices, Inc. All rights reserved. ADM4168E Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Pin Configuration and Function Descriptions..............................6 Applications ....................................................................................... 1 Typical Performance Characteristics ..............................................7 Functional Block Diagram .............................................................. 1 Test Circuits and Switching Characteristics...................................9 General Description ......................................................................... 1 Driver Measurements ...................................................................9 Revision History ............................................................................... 2 Receiver Measurements ................................................................9 Specifications..................................................................................... 3 Theory of Operation ...................................................................... 10 Timing Specifications .................................................................. 4 Truth Tables................................................................................. 10 Absolute Maximum Ratings ............................................................ 5 Outline Dimensions ....................................................................... 11 Thermal Resistance ...................................................................... 5 Ordering Guide .......................................................................... 11 ESD Caution .................................................................................. 5 REVISION HISTORY 9/12—Revision 0: Initial Version Rev. 0 | Page 2 of 12 Data Sheet ADM4168E SPECIFICATIONS 4.5 V ≤ VCC ≤ 5.5 V; all minimum/maximum specifications apply over the entire recommended operation range, unless otherwise noted. All typical specifications are at TA = 25°C, VCC = 5.0 V, unless otherwise noted. Table 1. Parameter SUPPLY CURRENT Total Package DRIVER Differential Outputs (Y1, Z1, Y2, Z2 Pins) Input Clamp Voltage Output Voltage High Output Voltage Low Differential Output Voltage No Load Outputs Loaded 2 Δ|VOD| for Complementary Output States Common-Mode Output Voltage Δ|VOC| for Complementary Output States Output Leakage Current Output Current (Short Circuit) 3 Input Capacitance Logic Inputs (DI, DE Pins) Input Voltage High Input Voltage Low Input Current High Input Current Low RECEIVER Differential Inputs (A1, B1, A2, B2 Pins) Differential Input Threshold Voltage2 Input Voltage Hysteresis Input Current Line Input Resistance Logic Outputs (RO1, RO2 Pins) Output Voltage High Output Voltage Low Symbol Min ICC VIK VOH VOL |VOD1| |VOD2| ∆|VOD| VOC Δ|VOC| IO IOS CI 2.4 2.0 2.0 Typ Max Unit 4 5 6 9 mA mA Test Conditions/Comments No load, drivers enabled VI = VCC or GND VI = 2.4 V or 0.5 V 1 −1.5 V V V II = −18 mA VIH = 2 V, VIL = 0.8 V, IOH = −20 mA VIH = 2 V, VIL = 0.8 V, IOL = 20 mA V V V V V µA µA mA pF IO = 0 mA RL = 100 Ω (see Figure 11) RL = 100 Ω (see Figure 11) RL = 100 Ω (see Figure 11) RL = 100 Ω (see Figure 11) DE = 0 V, VCC = 0 V or 5 V, VO = 6 V DE = 0 V, VCC = 0 V or 5 V, VO = −0.25 V VO = VCC or GND 3.5 0.2 0.4 6.0 3.7 ±0.4 ±3.0 ±0.4 100 −100 −30 −150 6 VIH VIL IIH IIL 2.0 VTH VHYS II −200 RIN 12 30 VOH VOL 3.8 4.2 0.1 0.8 1 −1 +200 60 1.5 −2.5 1 0.3 Measured per input with other inputs at VCC or GND. For exact conditions, see TIA/EIA-422-B. 3 No more than one output shorted at any time, with the duration of the short not to exceed 1 second. 2 Rev. 0 | Page 3 of 12 V V µA µA VI = VCC or VIH VI = GND or VIL mV mV mA mA kΩ VI = 7 V, other input at 0 V VI = −7 V, other input at 0 V VIC = −7 V to +7 V, other input at 0 V V V VID = 200 mV, IOH = −6 mA VID = −200 mV, IOL = 6 mA ADM4168E Data Sheet TIMING SPECIFICATIONS 4.5 V ≤ VCC ≤ 5.5 V; all minimum/maximum specifications apply over the entire recommended operation range, unless otherwise noted. All typical specifications are at TA = 25°C, VCC = 5.0 V, unless otherwise noted. Table 2. Parameter DRIVER Propagation Delay Driver Output Skew Rise Time/Fall Time Enable Time Disable Time RECEIVER 1 Propagation Delay Transition Time 1 Symbol Min tDPLH, tDPHL tSK tDR, tDF tZH, tZL tHZ, tLZ tRPLH, tRPHL tTLH, tTHL 9 Typ Max Unit 8 1.5 5 10 7 16 4 10 19 16 ns ns ns ns ns Test Conditions/Comments R1, R2 = 50 Ω; R3 = 500 Ω; C1, C2, C3 = 40 pF S1 open (see Figure 12 and Figure 13) S1 open (see Figure 12 and Figure 13) S1 open (see Figure 12 and Figure 13) S1 closed (see Figure 13 and Figure 14) S1 closed (see Figure 13 and Figure 14) 15 4 27 9 ns ns CL = 50 pF (see Figure 15 and Figure 16) VIC = 0 V, CL = 50 pF (see Figure 15 and Figure 16) Measured per input with other inputs at VCC or GND. Rev. 0 | Page 4 of 12 Data Sheet ADM4168E ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE Table 3. Parameter VCC Digital Input Voltage (DE1, DE2) Driver Input Voltage (DI1, DI2) Receiver Output Voltage (RO1, RO2) Driver Output Voltage (Y1, Z1, Y2, Z2) Receiver Input Voltage (A1, B1, A2, B2) Operating Temperature Range Storage Temperature Range ESD Protection on Ax, Bx, Yx, and Zx Human Body Model (HBM) IEC 61000-4-2, Contact Discharge IEC 61000-4-2, Air Discharge θJA is specified for the worst-case conditions, that is, a device soldered in a circuit board for surface-mount packages. Rating −0.3 V to +7 V −0.3 V to +7 V −0.3 V to +7 V −0.3 V to VCC + 0.3 V −0.3 V to +7 V −14 V to +14 V −40°C to +85°C −65°C to +150°C Table 4. Thermal Resistance Package Type 16-Lead TSSOP ESD CAUTION ±15 kV ±8 kV ±8 kV Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; 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. Rev. 0 | Page 5 of 12 θJA 113 Unit °C/W ADM4168E Data Sheet PIN CONFIGURATION AND FUNCTION DESCRIPTIONS 16 VCC B1 1 A1 2 15 DI1 DE1 4 ADM4168E 13 Z1 RO2 5 TOP VIEW (Not to Scale) 12 DE2 A2 6 11 Z2 B2 7 10 Y2 GND 8 9 DI2 10820-002 14 Y1 RO1 3 Figure 2. Pin Configuration Table 5. Pin Function Descriptions Pin No. 1 2 3 4 Mnemonic B1 A1 RO1 DE1 5 6 7 8 9 RO2 A2 B2 GND DI2 10 11 12 Y2 Z2 DE2 13 14 15 Z1 Y1 DI1 16 VCC Description Inverting Receiver Input B, Transceiver 1. Noninverting Receiver Input A, Transceiver 1. Receiver Output, Transceiver 1. Driver Output Enable, Transceiver 1. A logic high enables the differential driver outputs, Y1 and Z1; a logic low places the differential driver outputs in a high impedance state. Receiver Output, Transceiver 2. Noninverting Receiver Input A, Transceiver 2. Inverting Receiver Input B, Transceiver 2. Ground. Driver Input, Transceiver 2. When the driver is enabled, a logic low on DI2 forces Y2 low and Z2 high, whereas a logic high on DI2 forces Y2 high and Z2 low. Noninverting Driver Output Y, Transceiver 2. Inverting Driver Output Z, Transceiver 2. Driver Output Enable, Transceiver 2. A logic high enables the differential driver outputs, Y2 and Z2; a logic low places the differential driver outputs in a high impedance state. Inverting Driver Output Z, Transceiver 1. Noninverting Driver Output Y, Transceiver 1. Driver Input, Transceiver 1. When the driver is enabled, a logic low on DI1 forces Y1 low and Z1 high, whereas a logic high on DI1 forces Y1 high and Z1 low. Power Supply (5 V ± 10%). Rev. 0 | Page 6 of 12 Data Sheet ADM4168E TYPICAL PERFORMANCE CHARACTERISTICS 120 100 100Ω LOAD UNLOADED SUPPLY CURRENT, ICC (mA) 100 SUPPLY CURRENT, ICC (mA) 100Ω LOAD UNLOADED 90 80 60 40 80 70 60 50 40 30 20 20 40 60 80 TEMPERATURE (°C) 0 1 2 3.7 3.6 3.5 3.4 3.3 3.2 3.1 –20 0 20 40 60 80 TEMPERATURE (°C) DRIVER DIFFERENTIAL OUTPUT VOLTAGE, |VOD2| (V) TRANSCEIVER 1 TRANSCEIVER 2 3.8 3.0 –40 RECEIVER OUTPUT VOLTAGE LOW, VOL (mV) 3 2 1 20 40 60 80 TEMPERATURE (°C) 9 10 5.4 5.5 TRANSCEIVER 1 TRANSCEIVER 2 4.1 3.9 3.7 3.5 3.3 3.1 2.9 2.7 2.5 4.5 4.6 4.7 4.8 4.9 5.0 5.1 5.2 5.3 TRANSCEIVER 1 TRANSCEIVER 2 450 400 350 300 250 200 150 100 50 0 –40 10820-014 RECEIVER OUTPUT VOLTAGE HIGH, VOH (V) 4 0 8 4.3 500 TRANSCEIVER 1 TRANSCEIVER 2 –20 7 Figure 7. Driver Differential Output Voltage vs. Supply Voltage 5 0 –40 6 SUPPLY VOLTAGE, VCC (V) Figure 4. Driver Differential Output Voltage vs. Temperature 6 5 Figure 6. Supply Current vs. Data Rate 10820-008 DRIVER DIFFERENTIAL OUTPUT VOLTAGE, |VOD2| (V) 3.9 4 DATA RATE (Mbps) Figure 3. Supply Current vs. Temperature, Data Rate = 10 Mbps 4.0 3 10820-009 20 –20 0 20 40 60 80 TEMPERATURE (°C) Figure 8. Receiver Output Voltage Low vs. Temperature Figure 5. Receiver Output Voltage High vs. Temperature Rev. 0 | Page 7 of 12 10820-015 0 10820-003 –20 10820-004 10 0 –40 ADM4168E Data Sheet DI A 1 B 2 RO Y Z CH2 2V M100ns A CH1 2.48V 10820-007 CH1 2V CH3 2V CH2 2V CH4 2V Figure 9. Driver Output CH3 2V M100ns Figure 10. Receiver Output Rev. 0 | Page 8 of 12 A CH2 2.28V 10820-016 4 3 Data Sheet ADM4168E TEST CIRCUITS AND SWITCHING CHARACTERISTICS DRIVER MEASUREMENTS Y RL 2 DI Y DI VOD2 RL 2 DE VOC R1 R3 VOD C1 1.5V S1 R2 Z Z C3 10820-019 Z C2 10820-021 Y NOTES 1. C1, C2, C3 INCLUDE PROBE/INSTRUMENT CAPACITANCE. Figure 11. Driver Voltage Measurements Figure 13. Driver Timing Circuit 5V 5V DE INPUT 1.3V 1.3V 1.3V 1.3V 0V 0V tDPHL tDPLH tZL tLZ 1.5V VOH VOL + 0.3V VOL VOL tZH tSK tSK VOH VOH OUT Z 2V VOH – 0.3V 50% 50% 1.3V 1.5V 1.3V VOL tDPHL +VO tHZ NOTES 1. INPUT PULSE GENERATOR: PPR 1MHz; 50% DUTY CYCLE; tR, tF ≤ 6ns. tDPLH 90% POINT Figure 14. Driver Enable/Disable Timing 90% POINT VOD 10% POINT 10% POINT tDR tDF NOTES 1. INPUT PULSE GENERATOR: PPR 1MHz; 50% DUTY CYCLE; tR, tF ≤ 6ns. 10820-020 –VO Figure 12. Driver Propagation Delay and Rise/Fall Timing RECEIVER MEASUREMENTS A 2.5V 0V 0V tRPLH tRPHL VO B –2.5V 90% 50% 50% 10% 10% tTLH tTHL NOTES 1. INPUT PULSE GENERATOR: PPR 1MHz; 50% DUTY CYCLE; tR, tF ≤ 6ns. VOL 10820-024 RO NOTES 1. CL INCLUDES PROBE/INSTRUMENT CAPACITANCE. Figure 16. Receiver Timing Circuit VOH 90% CL Figure 15. Receiver Propagation Delay and Transition Timing Rev. 0 | Page 9 of 12 10820-023 B (A = 0V) 10820-022 1.3V 0.8V OUT 50% 1.3V 50% Y ADM4168E Data Sheet THEORY OF OPERATION The ADM4168E is a dual RS-422 transceiver that operates from a single 5 V ± 10% power supply. The ADM4168E is intended for balanced data transmission and complies with TIA/EIA-422-B and ITU-T recommendation V.11. Each device contains two differential line drivers and two differential line receivers and is suitable for full-duplex data transmission. The receivers contain a fail-safe feature that results in a logic high output state if the inputs are unconnected (floating). The ADM4168E features a low propagation delay, ensuring maximum baud rate operation. The balanced driver ensures distortion-free transmission. Another important specification is a measure of the skew between the complementary outputs. Low skew enhances the noise immunity of the system and decreases the amount of electromagnetic interference (EMI). Table 7. Transmitting (Each Driver) DE H H L Z L H Z Table 8. Receiving (Each Receiver) Inputs A−B ≥ +0.2 V ≤ −0.2 V −0.2 V < A − B < +0.2 V Inputs open TRUTH TABLES Table 6. Abbreviations in Truth Tables Letter H I L X Z Inputs DI H L X Description High level Indeterminate Low level Irrelevant High impedance (off ) Rev. 0 | Page 10 of 12 Output RO H L I H Outputs Y H L Z Data Sheet ADM4168E OUTLINE DIMENSIONS 5.10 5.00 4.90 16 9 4.50 4.40 4.30 6.40 BSC 1 8 PIN 1 1.20 MAX 0.15 0.05 0.20 0.09 0.30 0.19 0.65 BSC COPLANARITY 0.10 SEATING PLANE 8° 0° 0.75 0.60 0.45 COMPLIANT TO JEDEC STANDARDS MO-153-AB Figure 17. 16-Lead Thin Shrink Small Outline Package [TSSOP] (RU-16) Dimensions shown in millimeters ORDERING GUIDE Model 1 ADM4168EBRUZ ADM4168EBRUZ-RL7 EVAL-ADM4168EEBZ 1 Temperature Range −40°C to +85°C −40°C to +85°C Package Description 16-Lead Thin Shrink Small Outline Package [TSSOP] 16-Lead Thin Shrink Small Outline Package [TSSOP] Evaluation Board Z = RoHS Compliant Part. Rev. 0 | Page 11 of 12 Package Option RU-16 RU-16 ADM4168E Data Sheet NOTES ©2012 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D10820-0-9/12(0) Rev. 0 | Page 12 of 12