Overview
The ISO7731FDBQ from Texas Instruments is a high-performance, triple-channel digital isolator designed to provide robust electrical isolation and high data transfer rates. This device is part of the ISO773x family, which features reinforced insulation ratings and is suitable for a wide range of applications requiring reliable and isolated digital signal transmission.
The ISO7731FDBQ is packaged in a 16-pin QSOP (DBQ) package and offers up to 3000 VRMS isolation rating per UL 1577. It operates over a wide temperature range of –55°C to +125°C and supports supply voltages from 2.25V to 5.5V. This isolator is particularly useful in systems that require high electromagnetic immunity and low emissions, making it ideal for industrial, automotive, and medical applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Data Rate | 100 Mbps | |
| Isolation Rating | Up to 3000 VRMS (DBQ package) | |
| Surge Capability | Up to 12.8 kV | |
| Common Mode Transient Immunity (CMTI) | ±100 kV/µs (typical) | |
| Supply Voltage Range | 2.25V to 5.5V | |
| Operating Temperature Range | –55°C to +125°C | |
| Package Type | QSOP (DBQ-16) | |
| Power Consumption (typical at 1 Mbps) | 1.5 mA per channel | |
| Propagation Delay (typical at 5V Supplies) | 11 ns | |
| ESD Protection | ±8 kV IEC 61000-4-2 contact discharge protection |
Key Features
- Robust isolation barrier with >30-year projected lifetime at 1500 VRMS working voltage
- Wide supply range: 2.25V to 5.5V with level translation
- Default output high (ISO773x) and low (ISO773xF) options
- Enable pins for high impedance and power reduction in multi-controller driving applications
- Low power consumption and low propagation delay
- High electromagnetic immunity and low emissions
- System-level ESD, EFT, and surge immunity
- Safety-related certifications including DIN EN IEC 60747-17, UL 1577, IEC 61010-1, IEC 62368-1, and IEC 60601-1
- Automotive version available: ISO773x-Q1
Applications
- Industrial automation
- Motor control
- Power supplies
- Solar inverters
- Medical equipment
- RS-485, RS-232, and CAN bus systems
Q & A
- What is the maximum data rate of the ISO7731FDBQ?
The ISO7731FDBQ supports a maximum data rate of 100 Mbps.
- What is the isolation rating of the ISO7731FDBQ?
The ISO7731FDBQ has an isolation rating of up to 3000 VRMS (DBQ package) per UL 1577.
- What is the operating temperature range of the ISO7731FDBQ?
The operating temperature range is –55°C to +125°C.
- What are the package options for the ISO773x family?
The ISO773x family is available in 16-pin wide-SOIC (DW) and QSOP (DBQ) packages.
- Does the ISO7731FDBQ have ESD protection?
- What are the safety-related certifications for the ISO7731FDBQ?
The device is certified according to DIN EN IEC 60747-17, UL 1577, IEC 61010-1, IEC 62368-1, and IEC 60601-1.
- Can the ISO7731FDBQ be used in automotive applications?
- How does the ISO7731FDBQ handle power consumption?
The device has low power consumption, typically 1.5 mA per channel at 1 Mbps, and features enable pins to reduce power consumption in multi-controller driving applications.
- What is the propagation delay of the ISO7731FDBQ?
The propagation delay is typically 11 ns at 5V supplies.
- What are some common applications of the ISO7731FDBQ?
