Overview
The ISO7221BDR is a dual-channel digital isolator produced by Texas Instruments. It is part of the ISO7220x and ISO7221x family of devices, designed to provide galvanic isolation of up to 4000VPK per VDE. The device uses silicon dioxide (SiO2) as the isolation barrier, ensuring high reliability and protection against high voltage and noise currents. It is suitable for various applications requiring fast data transfer and robust isolation, such as industrial automation, solar inverters, battery management systems, and medical equipment.
Key Specifications
| Parameter | Description | Value | Unit |
|---|---|---|---|
| Package | SOIC-8 | - | - |
| Number of Channels | 2 | - | - |
| Channel Type | Unidirectional | - | - |
| Isolation Voltage | 2500 Vrms (for 1 minute per UL1577) | 2500 | Vrms |
| Common Mode Transient Immunity | 50kV/μs Typical | 50kV/μs | - |
| Data Rate | Up to 150 Mbps | 150 Mbps | - |
| Propagation Delay tpLH / tpHL (Max) | 70ns, 70ns | 70ns | - |
| Pulse Width Distortion (Max) | 3ns | 3ns | - |
| Rise and Fall Time | 1ns, 1ns | 1ns | - |
| Supply Voltage – Operating | 2.8V, 3.3V, or 5V | - | V |
| Temperature Range – Operating | -40°C to +125°C | -40°C to +125°C | °C |
| ESD Protection | ±4000 V (HBM) | ±4000 V | - |
Key Features
- 1, 5, 25, and 150Mbps signaling rate options
- Low channel-to-channel output skew; 1ns Max
- Low pulse-width distortion (PWD); 1ns Max
- Low jitter content; 1ns Typ at 150Mbps
- 50kV/μs typical transient immunity
- Operates with 2.8V (C-Grade), 3.3V, or 5V supplies
- 4kV 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 62368-1, IEC 61010-1, IEC 60601-1, and GB 4943.1.
Applications
- Factory automation: Modbus, Profibus™, DeviceNet™ data buses
- Computer peripheral interface
- Servo control interface
- Data acquisition
- Industrial automation
- Solar inverters
- Battery management systems
- Medical equipment, such as patient monitors, where isolation is essential for safety reasons.
Q & A
- What is the ISO7221BDR used for?
The ISO7221BDR is a dual-channel digital isolator used to provide galvanic isolation in various applications, including industrial automation, solar inverters, battery management systems, and medical equipment.
- What are the signaling rate options for the ISO7221BDR?
The ISO7221BDR supports signaling rates of 1, 5, 25, and 150 Mbps.
- What is the isolation voltage of the ISO7221BDR?
The ISO7221BDR provides an isolation voltage of up to 2500 Vrms for 1 minute per UL1577.
- What are the operating supply voltages for the ISO7221BDR?
The device operates with 2.8V (C-Grade), 3.3V, or 5V supplies.
- What is the temperature range for the ISO7221BDR?
The operating temperature range is –40°C to +125°C.
- Does the ISO7221BDR have ESD protection?
Yes, it has ±4000 V ESD protection (HBM).
- What are the safety-related certifications for the ISO7221BDR?
The device is certified under DIN EN IEC 60747-17 (VDE 0884-17), UL 1577, IEC 62368-1, IEC 61010-1, IEC 60601-1, and GB 4943.1.
- What is the typical life expectancy of the ISO7221BDR at rated voltage?
The device has a typical life expectancy of 28 years at rated voltage.
- What is the common mode transient immunity of the ISO7221BDR?
The device has a typical common mode transient immunity of 50kV/μs.
- What is the package type of the ISO7221BDR?
The device is available in an 8-pin SOIC package.
