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Part: ISO508P
Category:
Analog & Mixed-Signal Processing
-> Amplifiers
-> Isolation Amplifiers
Description: ti ISO508, Uni-directional ISOlated Digital Couplers
Company: Texas Instruments, Inc.
Datasheet: Download ISO508P datasheet File size : 1158 kB
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Datasheet text preview:
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ISO
508
ISO508
ISO
508
For most current data sheet and other product information, visit www.burr-brown.com
Uni-Directional ISOLATED DIGITAL COUPLERS
FEATURES
q LOW POWER CONSUMPTION: < 12mW per Channel Typ. q 1500Vrms ISOLATION: 100% Tested by Partial Discharge q ASYNCHRONOUS OR SYNCHRONOUS OPERATION q DOUBLE BUFFERED DESIGN FOR EASY INTEGRATION INTO BUS-BASED SYSTEMS q TRI-STATE OUTPUTS q 24-PIN PDIP OR GULL WING PACKAGES q 2MWORDS/SEC TRANSFER RATE q 1µSEC TRANSIENT RECOVERY
DESCRIPTION
ISO508 is an 8-channel, isolated, digital coupler based on the Burr-Brown capacitive barrier technology. The ISO508 has additional circuitry to ensure DC accuracy and overcome the edge-sensitive nature of normal capacitive devices even on power-up conditions. The novel circuitry involved will restore the correct output after a transient interruption should that be necessary. The ISO508 is designed with input and output buffers for ease of integration into a µP bus system. The output buffer has tri-state capability, and by the use of OE, the output data bus lines can be made to go high impedance. This feature of the ISO508, which allows multiple access to a data bus, requires extra circuitry when using an alternative solution. ISO508 will transfer an 8-bit word at rates up to 2Mwords/s without the skew problems associated in implementing this function with optocouplers. The ISO508 is available in 24-pin PDIP or 24-pin Gull Wing packages. Both are specified for operation from 40°C to +85°C.
APPLICATIONS
q PARALLEL ADCs/DACs q DIGITAL INTERFACES q DIGITAL TRANSMISSION q GROUND-LOOP ISOLATION
L A DATA IN T C H
L A T C H
S H I F T
S H I F T
L A T C H
L A T C H DATA OUT
LEI CONT
OE LEO
International Airport Industrial Park · Mailing Address: PO Box 11400, Tucson, AZ 85734 · Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 · Tel: (520) 746-1111 · Twx: 910-952-1111 Internet: http://www.burr-brown.com/ · FAXLine: (800) 548-6133 (US/Canada Only) · Cable: BBRCORP · Telex: 066-6491 · FAX: (520) 889-1510 · Immediate Product Info: (800) 548-6132
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©
1998 Burr-Brown Corporation
PDS-1422B
1
ri ted in U.S.A. IPSnO508 June, 1999
SBOS080
SPECIFICATIONS
At TA = +25°C, and VS = +5V, unless otherwise noted. ISO508P, P-U PARAMETER ISOLATION Rated Voltage, Continuous Partial Discharge Voltage Barrier Impedance Leakage Current Creepage Distance Internal Isolation Distance Transient Recovery Time DC CHARACTERISTICS High Level Input Voltage Low Level Input Voltage Input Pull-Down Current (Cont, OE) Input Leakage Current High Z Leakage Current Input Capacitance High Level Output Voltage Low Level Output Voltage Output Short-Circuit Current TIMING LE Width (LOW) LE Width (HIGH) Data Set-Up to LEI Data Hold from LEI Propagation Delay Data Output Delay Output Rise and Fall Time Output Enable Output Disable Skew Max Data Transfer Rate (Sync) (Cont) POWER Supply Voltage Supply Current Supply Current TEMPERATURE RANGE Operating Storage Thermal Resistance, JA VIH VIL I PD IL IH CIN VOH VOL I OS tWL tIL t SU tH t PD t DD tOD t OE tDIS CONDITIONS MIN TYP MAX UNITS
VISO
50Hz, 60Hz 1s, 5x5pC/cycle(1) 240V, 60Hz 2500V, 50Hz PDIP = "P" Package PDIP = "P" Package 5kV/µs Edge See Note 2 See Note 2 VIN = 5V LEI, LEO, D0-7
1500 2500 >1014, 10 1 12 11 0.1 1 2 5 1 1 5 VS 1 0.4 30 50 15 0 20 1000 520 35 14 35 25 0.8 50
V V pF µA µA mm mm µs V V µA nA nA pF V V mA ns ns ns ns ns ns ns ns ns ns ns Mw/s Mw/s V mA mA mA mA °C °C °C/W
VS = 4.4 - 4.5, IOH = 6mA I OL = 6mA 1 second, max
LEI HI to LO LEI HI to LO Data In to Data Out (Cont) LEI LOW to Data Out (Sync) LEO High to Data Out Change 10% to 90%, CL = 50pF OE to Data Valid High or Low OE to Data Hi-Z Between any 2 Channels
9
5 2 1
VSA, VSB ISA ISB
Either Side Transmit Side DC Transmit Side DC Max Rate Receive Side DC Receive Side Max Rate
4.5 5 7 8 12 40 40 75
5.5 10 15 12 20 +85 +125
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 400mV hysteresis.
The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes no responsibility for the use of this information, and all use of such information shall be entirely at the user's own risk. Prices and specifications are subject to change without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrant any BURR-BROWN product for use in life support devices and/or systems.
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ISO508
2
PIN CONFIGURATION
Top View DIP
FUNCTIONAL DESCRIPTION
NAME DIN (0 - 7) DOUT (0 - 7) FUNCTION Input Data Bus. Inputs are CMOS/TTL compatible. Output Data Bus. Outputs are TTL compatible. Input Latch Enable. Latch enable signal for the input data buffer. A logic LOW will latch the input data preventing further changes being made before data transmission across the barrier, and transmit if in synchronous mode. A logic HIGH will allow the data to pass from the input pins to the input buffer. Output Latch Enable. Latch enable signal for the output data buffer. A logic LOW will latch the internal data to the output pins and prevent further changes to the output data. A logic HIGH will allow the internal data to be passed to the output pins as soon as it becomes available. Synchronous/Asynchronous Mode Select. A logic HIGH selects asynchronous mode. A logic LOW selects synchronous mode. Output Tri-State Enable. Makes the output data pins high impedance to allow multiple parallel access to the data bus. A logic HIGH will make DOUT (0 - 7) high impedance. A logic LOW will allow DOUT (0 - 7) to be driven to the correct logic level.
VSA CONT DIN0 DIN1 DIN2 DIN3 DIN4 DIN5 DIN6
1 2 3 4 5 6 7 8 9 ISO508
24 23 22 21 20 19 18 17 16 15 14 13
GNDB LEO DOUT0 DOUT1
LEI
LEO
DOUT2 DOUT3 DOUT4 DOUT5 DOUT6 DOUT7 OE VSB
OE CONT
DIN7 10 LEI 11 GNDA 12
ABSOLUTE MAXIMUM RATINGS
Supply Voltage: VSA .... 0.5V to +6V VSB .... 0.5V to +6V Maximum Input Current, any Input Pin ............ 20mA Continuous Isolation Voltage ..... 1500Vr ms Storage Temperature ...... 40°C to +125°C Lead Temperature (soldering, 10s) ..... +260°C
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.
PACKAGE INFORMATION
PRODUCT ISO508P ISO508P-U PACKAGE 24-Pin Plastic DIP 24-Pin Gull Wing Surface Mount PACKAGE DRAWING NUMBER(1) 167 167-4
NOTE: (1) For detailed drawing and dimension table, please see end of data sheet, or Appendix C of Burr-Brown IC Data Book.
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ISO508
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