ISO7021 Isolator Datasheet

ISO7021 Datasheet PDF, Equivalent


Part Number

ISO7021

Description

Ultra-Low Power Two-Channel Digital Isolator

Manufacture

etcTI

Total Page 30 Pages
Datasheet
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ISO7021
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ISO7021
SLLSFA0A – JULY 2019 – REVISED OCTOBER 2019
ISO7021 Ultra-Low Power Two-Channel Digital Isolator
1 Features
1 Ultra-low power consumption
– 4.8 μA per channel quiescent current (3.3 V)
– 15 μA per channel at 100 kbps (3.3 V)
– 120 μA per channel at 1 Mbps (3.3 V)
• Robust isolation barrier
– >100-year projected lifetime
– 3000 VRMS isolation rating
– ±100 kV/μs typical CMTI
• Wide supply range: 1.71 V to 1.89 V and 2.25 V to
5.5 V
• Wide temperature range: –55°C to +125°C
• Small 8-SOIC package (8-D)
• Signaling rate: Up to 4 Mbps
• Default output High (ISO7021) and Low
(ISO7021F) options
• Robust electromagnetic compatibility (EMC)
– System-level ESD, EFT, and surge immunity
– ±8 kV IEC 61000-4-2 contact discharge
protection across isolation barrier
– Very low emissions
• Safety-related certifications (planned):
– UL 1577 Component Recognition Program
– DIN V VDE V 0884-11
– CQC, TUV and CSA certifications
2 Applications
• 4-mA to 20-mA loop powered field transmitters
• Factory automation, process automation
• Low-power GPIO, UART isolation
3 Description
The ISO7021 device is an ultra-low power,
multichannel digital isolator that can be used to
isolate CMOS or LVCMOS digital I/Os. Each isolation
channel has a logic input and output buffer separated
by a double capacitive silicon dioxide (SiO2)
insulation barrier. Innovative edge based architecture
combined with an ON-OFF keying modulation
scheme allows these isolators to consume very-low
power while meeting 3000-VRMS isolation rating per
UL1577. The per channel dynamic current
consumption of the device is under 120 μA/Mbps and
the per channel static current consumption is 4.8 μA
at 3.3 V, allowing for use of the ISO7021 in both
power and thermal constrained system designs.
The device can operate as low as 1.71 V, as high as
5.5 V, and is fully functional with different supply
voltages on each side of isolation barrier. The two-
channel isolator comes in a narrow body 8-SOIC
package with one forward and one reverse-direction
channel in a 8-SOIC package. The device has default
output high and low options. If the input power or
signal is lost, default output is high for the ISO7021
device without the suffix F and low for the ISO7021F
device with the F suffix. See the Device Functional
Modes section for more information.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
ISO7021
SOIC (8-D)
4.90 mm × 3.91 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Application Schematic
VCC1
VDD
MCU
DGND
Digital
Ground
VCC1
VCC2
ISO7021
GND1
GND2
Galvanic
Isolation Barrier
VCC2
ADC
ISO
Ground
Data Rate vs Power Consumption at 3.3 V
400
100
10
2
1 10 100 1000 4000
Data Rate (kbps)
SLLS
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.

ISO7021
ISO7021
SLLSFA0A – JULY 2019 – REVISED OCTOBER 2019
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Device Comparison Table..................................... 3
6 Pin Configuration and Functions ......................... 4
7 Specifications......................................................... 5
7.1 Absolute Maximum Ratings ...................................... 5
7.2 ESD Ratings.............................................................. 5
7.3 Recommended Operating Conditions....................... 6
7.4 Thermal Information .................................................. 7
7.5 Power Ratings........................................................... 7
7.6 Insulation Specifications............................................ 8
7.7 Safety-Related Certifications..................................... 9
7.8 Safety Limiting Values .............................................. 9
7.9 Electrical Characteristics 5V Supply ....................... 10
7.10 Supply Current Characteristics 5V Supply............ 10
7.11 Electrical Characteristics 3.3V Supply .................. 11
7.12 Supply Current Characteristics 3.3V Supply......... 11
7.13 Electrical Characteristics 2.5V Supply .................. 12
7.14 Supply Current Characteristics 2.5V Supply......... 12
7.15 Electrical Characteristics 1.8V Supply .................. 13
7.16 Supply Current Characteristics 1.8V Supply......... 13
7.17 Switching Characteristics ...................................... 14
7.18 Insulation Characteristics Curves ......................... 14
7.19 Typical Characteristics .......................................... 15
8 Parameter Measurement Information ................ 17
9 Detailed Description ............................................ 18
9.1 Overview ................................................................. 18
9.2 Functional Block Diagram ....................................... 18
9.3 Feature Description................................................. 18
9.4 Device Functional Modes........................................ 20
10 Application and Implementation........................ 21
10.1 Application Information.......................................... 21
10.2 Typical Application ................................................ 22
11 Power Supply Recommendations ..................... 24
12 Layout................................................................... 25
12.1 Layout Guidelines ................................................. 25
12.2 Layout Example .................................................... 25
13 Device and Documentation Support ................. 26
13.1 Documentation Support ........................................ 26
13.2 Receiving Notification of Documentation Updates 26
13.3 Community Resource............................................ 26
13.4 Trademarks ........................................................... 26
13.5 Electrostatic Discharge Caution ............................ 26
13.6 Glossary ................................................................ 26
14 Mechanical, Packaging, and Orderable
Information ........................................................... 26
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Original (July 2019) to Revision A
Page
• RTM release ........................................................................................................................................................................... 1
2 Submit Documentation Feedback
Product Folder Links: ISO7021
Copyright © 2019, Texas Instruments Incorporated


Features Product Folder Order Now Technical Doc uments Tools & Software Support & Com munity ISO7021 SLLSFA0A – JULY 2019 – REVISED OCTOBER 2019 ISO7021 Ultra- Low Power Two-Channel Digital Isolator 1 Features •1 Ultra-low power consum ption – 4.8 μA per channel quiescent current (3.3 V) – 15 μA per channel at 100 kbps (3.3 V) – 120 μA per ch annel at 1 Mbps (3.3 V) • Robust isol ation barrier – >100-year projected l ifetime – 3000 VRMS isolation rating – ±100 kV/μs typical CMTI • Wide supply range: 1.71 V to 1.89 V and 2.25 V to 5.5 V • Wide temperature range: –55°C to +125°C • Small 8-SOIC p ackage (8-D) • Signaling rate: Up to 4 Mbps • Default output High (ISO7021 ) and Low (ISO7021F) options • Robust electromagnetic compatibility (EMC) System-level ESD, EFT, and surge immu nity – ±8 kV IEC 61000-4-2 contact d ischarge protection across isolation ba rrier – Very low emissions • Safety -related certifications (planned): – UL 1577 Component Recognition Program – DIN V VDE V 0884-11 – CQC, TUV and C.
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