Data sheet
ISO224
- 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)
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.
Technical documentation
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Evaluation board
ISO224EVM — ISO224 evaluation module
The ISO224 evaluation module (EVM) is an evaluation platform for ISO224, which is a 7-kV reinforced isolation amplifier designed for use in voltage-measuring applications. ISO224EVM allows the user to explore all the features of the ISO224 device. ISO224EVM also features a bipolar (...)
User guide: PDF
Calculation tool
SBAR013 — Isolated Amplifier Voltage Sensing Excel Calculator
This calculator provides estimates of the errors associated with using isolation amplifier devices in a voltage sensing configuration.
Supported products & hardware
Products
Isolated amplifiers
Calculation tool
SBAR020 — Isolated Amplifier Current Sensing Excel Calculator
This calculator provides estimates of the errors associated with using isolation amplifier devices in a current sensing configuration.
Supported products & hardware
Products
Isolated amplifiers
Design tool
SBAC226 — Source files for SBAA317
Supported products & hardware
Products
General-purpose op amps
Isolated amplifiers
Precision ADCs
Simulation tool
PSPICE-FOR-TI — PSpice® for TI design and simulation tool
PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Reference designs
TIDA-010065 — High-efficiency, low-emission, isolated DC/DC converter-based analog input module reference design
This reference design is a simplified architecture for generating an isolated power supply for isolated amplifiers for measuring isolated voltages and currents. A fully integrated DC/DC converter with reinforced isolation operating from a 5-V input with configurable 5-V or 5.4-V output (headroom (...)
Reference designs
TIDA-00834 — High Accuracy Analog Front End Using 16-Bit SAR ADC with ±10V Measurement Range Reference Design
The TIDA-00834 reference design accurately measures voltage and current inputs using simultaneously sampled, 16-bit, ±10 V, bipolar input SAR ADC critical to identify power systems malfunction and power quality related failures accurately and quickly. This results in reduced power systems (...)
Reference designs
TIDA-00835 — High Accuracy ±0.5% Current and Isolated Voltage Measurement Ref Design Using 24-Bit Delta-Sigma ADC
The TIDA-00835 reference design allows for accurate voltage and current measurement using a bipolar input configuration by incorporating a four- channel, 24-bit simultaneously-sampling differential input Delta-Sigma ADC over wide dynamic range. The ADC is configured to measure ±2.5 V bipolar (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| SOIC (DWV) | 8 | Ultra Librarian |
Ordering & quality
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