Overview
The ISO7221MDG4 is a dual-channel digital isolator produced by Texas Instruments. This device is part of the ISO7221x family, which provides galvanic isolation between the input and output channels, ensuring high voltage and noise isolation. The ISO7221MDG4 is designed to facilitate PCB layout with channels oriented in opposite directions, making it suitable for various industrial and commercial applications. It operates with supply voltages of 2.8V, 3.3V, or 5V and supports signaling rates from 0Mbps to 150Mbps, making it versatile for different data transmission requirements.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| 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 | |
| Operating Supply Voltages | 2.8V, 3.3V, 5V | |
| ESD Protection | ±4000 V (HBM), ±1000 V (CDM) | |
| Operating Temperature Range | –40°C to +125°C | |
| Isolation Voltage | 4000 VPK | |
| Package Type | SOIC (8 pins) | |
| Body Size | 4.90 mm x 3.91 mm |
Key Features
- Galvanic isolation up to 4000 VPK, providing high voltage and noise isolation.
- Supports signaling rates from 0 Mbps to 150 Mbps.
- Low channel-to-channel output skew and pulse-width distortion.
- High electromagnetic immunity and transient immunity (50 kV/μs Typ).
- Operates with 2.8V, 3.3V, or 5V supplies; all inputs are 5V tolerant.
- 4kV ESD protection and high-level input current.
- Failsafe circuit drives output to a logic high state if input is unpowered or not actively driven.
- Safety-related certifications including DIN EN IEC 60747-17, UL 1577, and IEC 62368-1.
Applications
- Factory Automation: Modbus, Profibus™, DeviceNet™ data buses.
- Computer Peripheral Interface.
- Servo Control Interface.
- Data Acquisition.
- Industrial Fieldbus.
Q & A
- What is the primary function of the ISO7221MDG4?
The ISO7221MDG4 is a dual-channel digital isolator that provides galvanic isolation between the input and output channels, ensuring high voltage and noise isolation.
- What are the supported signaling rates for the ISO7221MDG4?
The device supports signaling rates from 0 Mbps to 150 Mbps.
- What are the operating supply voltages for the ISO7221MDG4?
The device operates with 2.8V, 3.3V, or 5V supplies.
- What is the maximum isolation voltage of the ISO7221MDG4?
The maximum isolation voltage is 4000 VPK.
- What are the safety-related certifications for the ISO7221MDG4?
The device has certifications including DIN EN IEC 60747-17, UL 1577, and IEC 62368-1.
- What is the operating temperature range of the ISO7221MDG4?
The operating temperature range is –40°C to +125°C.
- What is the package type and body size of the ISO7221MDG4?
The package type is SOIC (8 pins) with a body size of 4.90 mm x 3.91 mm.
- Does the ISO7221MDG4 have ESD protection?
Yes, it has ±4000 V (HBM) and ±1000 V (CDM) ESD protection.
- What happens if the input is unpowered or not actively driven?
The failsafe circuit drives the output to a logic high state if the input is unpowered or not actively driven.
- What are some common applications for the ISO7221MDG4?
Common applications include factory automation, computer peripheral interface, servo control interface, and data acquisition.
