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Part: ISO422
Category:
Description:
Company: Texas Instruments, Inc.
Datasheet: Download ISO422 datasheet File size : 1158 kB
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ISO422
ISO 422 ISO 422
www.ti.com
DIFFERENTIAL BUS TRANSCEIVER
FEATURES
q FULL-/HALF-DUPLEX OPERATION q 1500Vrms ISOLATION (cont) q 2500Vrms ISOLATION (1 min) q 2.5Mbps PERFORMANCE q LOOP-TEST FACILITY
DESCRIPTION
ISO422 provides 1500Vrms isolation for industrial bus transmission systems. ISO422 may be configured in full or half duplex modes providing the user with best flexibility for the application. Transmission rates of 2.5Mbps can be obtained covering most requirements. A loop-back test facility is included. LBE allows data on the D input to be routed to the R output for test purposes. ISO422 is available in 24-pin PDIP and 24-pin Gull Wing packages and is specified over the temperature range 40°C to +85°C.
APPLICATIONS
q BUS TRANSMISSION SYSTEMS q GROUND LOOP ISOLATION
DE
Y D Z
LBE A R B RE
Copyright © 2000, Texas Instruments Incorporated
SBOS113A
Printed in U.S.A. November, 2000
SPECIFICATIONS
At TA = +25°C, and VS = +5V, unless otherwise noted. ISO422P, P-U PARAMETER ISOLATION Rated Continuous Isolation Partial Discharge Voltage Barrier Impedance Leakage Current Creepage Distance Internal Isolation Distance Transient Recovery Time DRIVER DC CHARACTERISTICS High Level Input Voltage Low Level Input Voltage Input Leakage Current Input Capacitance Output Voltage Differential Output Voltage VIH VIL IL CIN VO VOD D D D D CONDITIONS MIN TYP MAX UNITS
VISO
50Hz, 60Hz 1s, 5 x 5pC/per cycle(1) 240V, 60Hz 2500V, 50Hz
1500 2500 > 1014 || 10 1 16 8.6 0.1
5kV/µs Edge and DE Inputs(2) and DE Inputs(2) and DE Inputs(2) and DE Inputs(2) VY or VZ IOY or I OZ = 0 RL = 100 RL = 54 RL = 100 or 54(3) RL = 100 or 54 RL = 100 or 54(3) VO = VCC2, Output Disabled VO = 0V, Output Disabled VO = VCC2, Continuous VO = 0V, Continuous RL = 54 RL = 54 RL = 54 R L = 100 R L = 100 R L = 100 R L = 100 VCC 1 2
1
V V || pF µA µA mm mm µs V V nA pF V V V V mV V mV nA nA mA mA ns ns ns ns ns ns ns V V mA nA V V nA pF mV mV mV nA V M ns ns ns ns ns ns ns ns ns
0.8 5 5 0 1.5 2 1.5 5 5 5 5 ±200 3 ±200 ±1000 ±1000
Change in Mag Diff Out Voltage Common-Mode Output Voltage Change in Mag CM Out Voltage Output Current Short-Circuit Output Current
|VOD| VOC |VOC| IO
3.6 2.8 ±40 ±40 ±10 ±10 100 110 120 25 120 120 120 120
DRIVER SWITCHING CHARACTERISTICS Differential Output Delay Time Skew |tDDH - tDDL| Differential Output Transition Time Output Enable Time to HIGH Output Enable Time to LOW Output Disable Time from HIGH Output Disable Time from LOW RECEIVER DC CHARACTERISTICS High Level Output Voltage Low Level Output Voltage Output Short-Circuit Current Output HI-Z Leakage Enable Input HIGH Threshold Enable Input LOW Threshold Input Leakage Current Input Capacitance Differential Input HIGH Threshold Differential Input LOW Threshold Input Hysteresis Line Input Current Line Voltage Input Resistance
(Figure 6) t DD tDT tDZH tDZL tDHZ tDLZ VOH VOL I OS I OZ VIH VIL IL CIN VTH VTL IBI VBI RIN
150 50 100 150 150 150 150
IOH = 6mA I OL = 6mA 1s max VOUT = 0V to VCC1 RE Input(2) RE Input(2) RE Input(2) RE Input(2) VO = 2.8V VO = 0.4V See Note 4 Power On (GNDB < VBI < VSB) Power Off (IBI ±10mA max)
0.4 30 ±10 2 0.8 5 5 100 100 60 ±10 ±12 ±1000
200
200
±1000
1 120 120 40 10 10 15 15 15 15 150 150
RECEIVER SWITCHING CHARACTERISTICS (Figure 7) Propagation Delay L to H tRLH VID = 1.5V to 1.5V, CL = 10pF Propagation Delay H to L tRHL VID = 1.5V to 1.5V, CL = 10pF Skew |tRLH - tRHL| Output Rise Time tR CL = 10pF Output Fall Time tF CL = 10pF Output Enable Time to HIGH tRZH CL = 10pF Output Enable Time to LOW tRZL CL = 10pF Output Disable Time from HIGH tRHZ CL = 10pF Output Disable Time from LOW tRLZ CL = 10pF
25 25 25 25
2
ISO422
SBOS113A
SPECIFICATIONS (CONT)
At TA = +25°C, and VS = +5V, unless otherwise noted. ISO422P, P-U PARAMETER POWER Supply Voltage--Data Side Supply Current--Data Side Supply Current--Data Side Supply Voltage--Bus Side Supply Voltage--Bus Side BUS LIMITS Input Current Maximum Differential Input Maximum Data Rate TEMPERATURE RANGE Operating Storage Thermal Resistance 40 40 CONDITIONS MIN TYP MAX UNITS
VSA ISA ISA VSB ISB
4.5 Output Unloaded, dc Output Unloaded, max Rate 4.5 Output Unloaded, dc Output Unloaded, max Rate 12 20 10 20
5.5 13 5.5 20
V mA mA V mA mA mA V Mbps °C °C °C/W
±10 ±5 2.5 +85 +125 75
JA
NOTES: (1) All devices receive a 1s test. Failure criterion is > 5 pulses of > 5pC per cycle. (2) Logic inputs are HCT-type and thresholds are a function of power supply voltage with approximately 100mV hysteresis. (3) Change in magnitude when the input is changed from HIGH to LOW. (4) The difference between the differential low to high and high to low transition points.
PIN CONFIGURATION
Top View DIP
ABSOLUTE MAXIMUM RATINGS
Supply Voltage: VSA .... 0.5V to +6V VSB .... 0.5V to +6V Continuous Isolation Voltage ..... 1500Vr ms Storage Temperature ...... 40°C to +125°C Lead Temperature (soldering, 10s) ..... +300°C
DE D NC VSA
1 2 3 4
24 RE 23 R 22 LBE 21 GNDA
ELECTROSTATIC DISCHARGE SENSITIVITY
Electrostatic discharge can cause damage ranging from performance degradation to complete device failure. BurrBrown Corporation recommends that all integrated circuits be handled and stored using appropriate ESD protection methods. ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet published specifications.
ISO422
GNDB
9
16 VSB 15 VSB 14 A 13 B
GNDB 10 Y 11 Z 12
PACKAGE /ORDERING INFORMATION
PACKAGE DRAWING NUMBER(1) 249-4 243-5 SPECIFIED TEMPERATURE RANGE 40°C to +85°C 40°C to +85°C PACKAGE MARKING ISO422P ISO422P-U ORDERING NUMBER ISO422P ISO422P-U TRANSPORT MEDIA Rails Rails
PRODUCT ISO422P ISO422P-U
PACKAGE 24-Pin Plastic DIP 24-Pin Gull Wing Surface Mount
NOTES: (1) For detailed drawing and dimension table, please see end of data sheet, or Appendix C of Burr-Brown IC Data Book.
ISO422
SBOS113A
3
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