Overview
The ISO7220MDRG4 is a dual-channel digital isolator produced by Texas Instruments. This device is part of the ISO7220x and ISO7221x family, designed to provide galvanic isolation between logic input and output buffers. The isolator uses TI’s silicon-dioxide (SiO2) isolation barrier, ensuring up to 4000VPK of isolation per VDE standards. It is particularly useful in applications requiring high voltage and ground isolation, as well as protection against noise currents that could interfere with or damage sensitive circuitry.
The device operates with signaling rates from 0 Mbps (DC) to 150 Mbps and supports supply voltages of 2.8V, 3.3V, or 5V. It features low channel-to-channel output skew, low pulse-width distortion, and low jitter content, making it suitable for a wide range of industrial and commercial applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | SOIC (D) | - |
| Pins | 8 | - |
| Operating Temperature Range | -40 to 125 | °C |
| Signaling Rate Options | 1, 5, 25, 150 Mbps | - |
| Channel-to-Channel Output Skew | 1 ns Max | - |
| Pulse-Width Distortion (PWD) | 1 ns Max | - |
| Jitter Content | 1 ns Typ at 150 Mbps | - |
| Transient Immunity | 50 kV/μs Typ | - |
| Supply Voltages | 2.8V, 3.3V, 5V | - |
| ESD Protection | 4 kV | - |
| Maximum Junction Temperature | 170 | °C |
| Storage Temperature | -65 to 150 | °C |
| Isolation Voltage | 4000 VPK | - |
Key Features
- 1, 5, 25, and 150 Mbps signaling rate options
- Low channel-to-channel output skew; 1 ns Max
- Low pulse-width distortion (PWD); 1 ns Max
- Low jitter content; 1 ns Typ at 150 Mbps
- 50 kV/μs typical transient immunity
- Operates with 2.8V (C-Grade), 3.3V, or 5V supplies
- 4 kV ESD protection
- High electromagnetic immunity
- –40°C to +125°C operating range
- Typical 28-year life at rated voltage
- Safety-related certifications: DIN EN IEC 60747-17 (VDE 0884-17), UL 1577, IEC 61010-1, IEC 62368-1
Applications
- Factory Automation: Modbus, Profibus™, DeviceNet™ data buses
- Computer Peripheral Interface
- Servo Control Interface
- Data Acquisition
Q & A
- What is the primary function of the ISO7220MDRG4?
The ISO7220MDRG4 is a dual-channel digital isolator that provides galvanic isolation between logic input and output buffers, protecting against high voltage and noise currents.
- What are the available signaling rate options for the ISO7220MDRG4?
The device supports signaling rates of 1, 5, 25, and 150 Mbps.
- What are the supported supply voltages for the ISO7220MDRG4?
The device operates with 2.8V (C-Grade), 3.3V, or 5V supplies.
- What is the maximum junction temperature for the ISO7220MDRG4?
The maximum junction temperature is 170°C.
- What is the isolation voltage rating of the ISO7220MDRG4?
The device has an isolation voltage rating of up to 4000 VPK.
- What safety certifications does the ISO7220MDRG4 have?
The device has certifications such as DIN EN IEC 60747-17 (VDE 0884-17), UL 1577, IEC 61010-1, and IEC 62368-1.
- What is the typical operating temperature range for the ISO7220MDRG4?
The device operates over a temperature range of –40°C to +125°C.
- What is the ESD protection rating of the ISO7220MDRG4?
The device has a 4 kV ESD protection rating.
- What are some common applications for the ISO7220MDRG4?
Common applications include factory automation, computer peripheral interfaces, servo control interfaces, and data acquisition.
- How does the ISO7220MDRG4 ensure failsafe operation?
The device uses a periodic update pulse to verify the proper dc level of the output. If this pulse is not received every 4 μs, the failsafe circuit drives the output to a logic high state.
- What is the package type and pin count of the ISO7220MDRG4?
The device is packaged in an SOIC (D) package with 8 pins.
