Overview
The ISO7220ADRG4 is a dual-channel digital isolator produced by Texas Instruments. This device is part of the ISO7220x and ISO7221x family, which provides galvanic isolation between the input and output logic signals. The isolator uses Texas Instruments' silicon-dioxide (SiO2) isolation barrier, ensuring up to 4000VPK of isolation voltage per VDE standards. It is designed to block high voltage and isolate grounds, preventing noise currents from interfering with sensitive circuitry. The device operates with supply voltages of 2.8V, 3.3V, or 5V and features a failsafe mechanism that drives the output to a logic high state if the input is unpowered or not actively driven.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Signaling Rate Options | 1, 5, 25, 150 Mbps | |
| Channel-to-Channel Output Skew | 0.2 - 3 ns | |
| Pulse-Width Distortion (PWD) | 0.5 - 1 ns | |
| Jitter Content | 1 ns (typ at 150 Mbps) | |
| Transient Immunity | 50 kV/μs (typ) | |
| Operating Temperature Range | -40°C to +125°C | |
| ESD Protection | ±4000 V (HBM), ±1000 V (CDM) | |
| Maximum Junction Temperature | 170°C | |
| Isolation Voltage | 4000 VPK (max transient), 2500 VRMS (withstand) |
Key Features
- Signaling rate options of 1, 5, 25, and 150 Mbps
- Low channel-to-channel output skew and pulse-width distortion
- High transient immunity of 50 kV/μs (typ)
- Operates with 2.8V, 3.3V, or 5V supplies
- 4kV ESD protection
- High electromagnetic immunity
- Wide operating temperature range of -40°C to +125°C
- Typical 28-year life at rated voltage
- 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
Q & A
- What is the primary function of the ISO7220ADRG4?
The ISO7220ADRG4 is a dual-channel digital isolator that provides galvanic isolation between the input and output logic signals.
- What are the available signaling rate options for the ISO7220ADRG4?
The device supports signaling rates of 1, 5, 25, and 150 Mbps.
- What is the maximum transient immunity of the ISO7220ADRG4?
The device has a transient immunity of 50 kV/μs (typ).
- What are the operating supply voltage options for the ISO7220ADRG4?
The device can operate with 2.8V, 3.3V, or 5V supplies.
- What is the ESD protection level of the ISO7220ADRG4?
The device has an ESD protection level of ±4000 V (HBM) and ±1000 V (CDM).
- What is the maximum junction temperature of the ISO7220ADRG4?
The maximum junction temperature is 170°C.
- What are the safety-related certifications for the ISO7220ADRG4?
The device is certified according to DIN EN IEC 60747-17, UL 1577, and IEC 62368-1.
- What is the typical lifespan of the ISO7220ADRG4 at rated voltage?
The device has a typical lifespan of 28 years at rated voltage.
- In what applications is the ISO7220ADRG4 commonly used?
The device is commonly used in factory automation, computer peripheral interfaces, servo control interfaces, and data acquisition.
- How does the failsafe mechanism work in the ISO7220ADRG4?
The failsafe mechanism drives the output to a logic high state if the input is unpowered or not actively driven.
