Overview
The ISO7742DWR is a high-performance, quad-channel digital isolator produced by Texas Instruments. This device is part of the ISO774x family, known for its robust isolation barrier and enhanced electromagnetic compatibility (EMC). The ISO7742DWR features a 5000VRMS isolation rating in the DW package, making it suitable for applications requiring high isolation and reliability. It operates over a wide temperature range of –55°C to 125°C and supports data rates up to 100Mbps. The device is designed to isolate CMOS or LVCMOS digital I/Os, providing a reliable solution for preventing noise currents from interfering with sensitive circuitry.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package Type | SOIC-16 (DW) | |
| Number of Channels | 4 | |
| Forward/Reverse Channels | 2 forward / 2 reverse | |
| Isolation Rating | Up to 5000VRMS (DW package) | |
| Surge Isolation Voltage | Up to 12800 VPK | |
| Transient Isolation Voltage | Up to 8000 VPK | |
| CMTI (Common Mode Transient Immunity) | ±100kV/µs typical | |
| Operating Temperature Range | –55°C to 125°C | |
| Supply Voltage Range | 2.25V to 5.5V | |
| Data Rate | Up to 100Mbps | |
| Propagation Delay Time | 10.7ns typical (5V Supplies) | |
| Current Consumption per Channel | Typical 1.5mA at 1Mbps |
Key Features
- High-performance, quad-channel digital isolator with up to 5000VRMS isolation rating.
- Robust isolation barrier with >30-year projected lifetime at 1500VRMS working voltage.
- Wide supply range: 2.25V to 5.5V and level translation capabilities.
- Default output high (ISO774x) and low (ISO774xF) options.
- Low power consumption, typical 1.5mA per channel at 1Mbps.
- Low propagation delay: 10.7ns typical (5V Supplies).
- Robust electromagnetic compatibility (EMC) and system-level ESD, EFT, and surge immunity.
- ±8kV IEC 61000-4-2 contact discharge protection across the isolation barrier.
- Wide-SOIC (DW-16) and QSOP (DBQ-16) package options.
- Safety-related certifications including DIN EN IEC 60747-17, UL 1577, IEC 61010-1, IEC 62368-1, and IEC 60601-1.
Applications
The ISO7742DWR is suitable for a variety of applications that require high isolation and reliability, including:
- Industrial control systems: Preventing noise currents on data buses such as RS-485, RS-232, and CAN from interfering with sensitive circuitry.
- Medical devices: Compliant with safety standards such as IEC 60601-1 for use in medical equipment.
- Automotive systems: Available in automotive versions (ISO774x-Q1) for use in vehicle electronics.
- Power supplies: Used in conjunction with isolated power supplies to enhance system reliability.
- General-purpose digital isolation: In applications requiring robust EMC and high-speed data transfer.
Q & A
- What is the isolation rating of the ISO7742DWR?
The ISO7742DWR has an isolation rating of up to 5000VRMS in the DW package.
- What is the maximum data rate supported by the ISO7742DWR?
The ISO7742DWR supports data rates up to 100Mbps.
- What are the operating temperature ranges for the ISO7742DWR?
The operating temperature range is –55°C to 125°C.
- What are the supply voltage ranges for the ISO7742DWR?
The supply voltage range is 2.25V to 5.5V).
- Does the ISO7742DWR have any safety-related certifications?
- What is the typical propagation delay time for the ISO7742DWR?
The typical propagation delay time is 10.7ns at 5V supplies).
- What is the current consumption per channel for the ISO7742DWR at 1Mbps?
The typical current consumption per channel is 1.5mA at 1Mbps).
- Does the ISO7742DWR have any EMC features?
- What package options are available for the ISO7742DWR?
- Is the ISO7742DWR suitable for automotive applications?
