Overview
The ISO7221MDRG4 is a dual-channel digital isolator from Texas Instruments, designed to provide high-speed, galvanic isolation between two circuits. This device is part of the ISO7221x family, which includes various options for different signaling rates and input thresholds. The ISO7221MDRG4 is particularly useful in applications requiring reliable, high-speed data transfer with robust isolation to prevent noise and voltage interference.
The device features a silicon-dioxide (SiO2) isolation barrier, ensuring up to 4000VPK of galvanic isolation. It operates with supply voltages of 2.8V, 3.3V, or 5V and is characterized for operation over an ambient temperature range of –40°C to +125°C. The ISO7221MDRG4 is packaged in an 8-pin SOIC (Small Outline Integrated Circuit) package, making it suitable for a variety of industrial and commercial applications.
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 | |
| Supply Voltage | 2.8V, 3.3V, 5V | V |
| ESD Protection | ±4000 V (HBM), ±1000 V (CDM) | V |
| Operating Temperature Range | –40°C to +125°C | °C |
| Isolation Voltage | 4000 VPK | VPK |
| Package Type | SOIC (8-pin) | |
| Body Size (Nominal) | 4.90 mm x 3.91 mm | mm |
Key Features
- High-speed signaling rates up to 150 Mbps
- Low channel-to-channel output skew and pulse-width distortion
- High electromagnetic immunity and transient immunity (50 kV/μs typical)
- Operates with 2.8V, 3.3V, or 5V supplies; all inputs are 5V tolerant
- 4kV ESD protection and high common-mode transient immunity
- Failsafe circuitry 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 and other high-speed data communication systems
Q & A
- What is the maximum signaling rate of the ISO7221MDRG4?
The maximum signaling rate is 150 Mbps.
- What are the available supply voltage options for the ISO7221MDRG4?
The device operates with 2.8V, 3.3V, or 5V supplies.
- What is the galvanic isolation voltage of the ISO7221MDRG4?
The device provides up to 4000 VPK of galvanic isolation.
- What are the key safety certifications for the ISO7221MDRG4?
The device is certified to DIN EN IEC 60747-17, UL 1577, and IEC 62368-1 among others.
- What is the operating temperature range of the ISO7221MDRG4?
The device operates over an ambient temperature range of –40°C to +125°C.
- What is the package type and size of the ISO7221MDRG4?
The device is packaged in an 8-pin SOIC package with a nominal body size of 4.90 mm x 3.91 mm.
- Does the ISO7221MDRG4 have ESD protection?
Yes, the device has ±4000 V (HBM) and ±1000 V (CDM) ESD protection.
- What are some typical applications for the ISO7221MDRG4?
Typical applications include factory automation, computer peripheral interfaces, servo control interfaces, and data acquisition.
- How does the failsafe circuitry work in the ISO7221MDRG4?
If the input is unpowered or not actively driven, the failsafe circuit drives the output to a logic high state.
- What is the common-mode transient immunity of the ISO7221MDRG4?
The device has a common-mode transient immunity of 50 kV/μs typical.
