Isolated Amplifier. ISO224 Datasheet

ISO224 Amplifier. Datasheet pdf. Equivalent

Part ISO224
Description Reinforced Isolated Amplifier
Feature Product Folder Order Now Technical Documents Tools & Software Support & Community ISO224 SBAS73.
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ISO224
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ISO224
SBAS738A – JUNE 2018 – REVISED OCTOBER 2018
ISO224 Reinforced Isolated Amplifier
With Single-Ended Input of ±12 V and Differential Output of ±4 V
1 Features
1 Offered in High-Grade (ISO224B) and Low-Grade
(ISO224A) Versions
• ±12-V Input Voltage Range Optimized for Isolated
Voltage Measurement in Industrial Applications
• Overvoltage Input Clamp With 9-kV ESD
• ±4-V Differential Output Voltage Range With
Common-Mode at VDD2 / 2
• Low DC-Error Operation (ISO224B):
– Input Offset: ±5 mV at 25°C, ±15 µV/°C max
– Gain Error: ±0.3% at 25°C, ±35 ppm/°C max
– Nonlinearity: ±0.01% max, ±0.1 ppm/°C typ
• 4.5-V to 18-V Single-Supply on High-Side
• 4.5-V to 5.5-V Operation on Low-Side
• Safety-Related Certifications:
– 7071-VPEAK Reinforced Isolation per DIN VDE
V 0884-11: 2017-01
– 5000-VRMS Isolation for 1 Minute per UL1577
• High CMTI (ISO224B): 80 kV/µs (typ)
2 Applications
• Isolated Analog Signal Acquisition in:
– Grid Automation
– Protection Relays
– Factory Automation and Control
– Rail Transport
– Motor Drives
– Power Analyzers
3 Description
The ISO224 is a precision isolated amplifier with an
output separated from the input circuitry by an
isolation barrier with high immunity to magnetic
interference. This barrier is certified to provide
reinforced galvanic isolation of up to 5 kVRMS with an
exceptionally long lifetime and low power dissipation.
When used with isolated power supplies, this device
separates parts of the system that operate on
different common-mode voltage levels and protects
lower-voltage devices from damage.
The input of the ISO224 is optimized for accurate
sensing of ±10-V signals that are widely used in
industrial applications. The device operates of a
single supply on the high-side. This unique feature
simplifies the design of the isolated power supply and
reduces the system cost. The integrated high-side
supply voltage detection feature simplifies system
level diagnostics. The ±4-V output of the ISO224
allows lower-cost analog-to-digital converters (ADCs)
to be used. The differential structure of the output
supports high immunity to noise.
The ISO224 is fully specified over the extended
industrial temperature range of –55°C to +125°C and
is available in a wide-body 8-pin SOIC (DWV)
package.
Device Information(1)
DEVICE NAME
PACKAGE
BODY SIZE
ISO224
SOIC (8)
5.85 mm × 7.5 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Simplified Schematic
ISO224
Up to ±12 V
Isolated
4.5 V to 18 V
optional
optional
GND1
IN Clamp
VDD1
GND1
VCAP
OUTP
OUTN
VDD2
GND2
ADS7945
14-Bit ADC
4.5 V to 5.5 V
GND2
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.



ISO224
ISO224
SBAS738A – JUNE 2018 – REVISED OCTOBER 2018
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 ......................... 3
7 Specifications......................................................... 4
7.1 Absolute Maximum Ratings ...................................... 4
7.2 ESD Ratings.............................................................. 4
7.3 Recommended Operating Conditions....................... 4
7.4 Thermal Information .................................................. 5
7.5 Power Ratings........................................................... 5
7.6 Insulation Specifications............................................ 6
7.7 Safety-Related Certifications..................................... 7
7.8 Safety Limiting Values .............................................. 7
7.9 Electrical Characteristics........................................... 7
7.10 Switching Characteristics ........................................ 9
7.11 Insulation Characteristics Curves ......................... 10
7.12 Typical Characteristics .......................................... 11
8 Detailed Description ............................................ 17
8.1 Overview ................................................................. 17
8.2 Functional Block Diagram ....................................... 17
8.3 Feature Description................................................. 18
8.4 Device Functional Modes........................................ 21
9 Application and Implementation ........................ 22
9.1 Application Information............................................ 22
9.2 Typical Application .................................................. 22
9.3 What to Do and What Not to Do ............................. 24
10 Power Supply Recommendations ..................... 25
11 Layout................................................................... 26
11.1 Layout Guidelines ................................................. 26
11.2 Layout Example .................................................... 26
12 Device and Documentation Support ................. 27
12.1 Documentation Support ........................................ 27
12.2 Receiving Notification of Documentation Updates 27
12.3 Community Resources.......................................... 27
12.4 Trademarks ........................................................... 27
12.5 Electrostatic Discharge Caution ............................ 27
12.6 Glossary ................................................................ 27
13 Mechanical, Packaging, and Orderable
Information ........................................................... 28
4 Revision History
Changes from Original (June 2018) to Revision A
Page
• Changed document status from Advance Information to Production Data ........................................................................... 1
2
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