Overview
The ISO7740-Q1, manufactured by Texas Instruments, is a high-performance, quad-channel digital isolator designed specifically for automotive applications. This device is part of the ISO774x-Q1 family, which includes the ISO7740-Q1, ISO7741-Q1, and ISO7742-Q1. The ISO7740-Q1 features four unidirectional channels, all in the same direction, and is known for its robust electromagnetic compatibility (EMC) and low emissions. It is AEC-Q100 qualified and operates within a wide temperature range of -40°C to 125°C, making it suitable for demanding automotive environments.
Key Specifications
| Specification | Value |
|---|---|
| Package | 16-SOIC (DW-16) |
| Pins | 16 |
| Operating Temperature Range | -40°C to 125°C |
| Number of Channels | 4 (all in the same direction) |
| Channel Type | Unidirectional |
| Voltage - Isolation | 5000 VRMS (DW package) |
| Common Mode Transient Immunity (Min) | ±100 kV/µs typical CMTI |
| Data Rate | 100 Mbps |
| Propagation Delay tpLH / tpHL (Max) | 16 ns, 16 ns |
| Voltage - Supply | 2.25 V to 5.5 V |
| Power Consumption | Typical 1.5 mA per channel at 1 Mbps |
| Surge Capability | Up to 12.8 kV |
| ESD Protection | ±8 kV IEC 61000-4-2 contact discharge protection |
Key Features
- Qualified for automotive applications and AEC-Q100 certified with a temperature grade of 1 (-40°C to 125°C).
- Robust isolation barrier with >30-year projected lifetime at 1500 VRMS working voltage, up to 5000 VRMS isolation rating, and up to 12.8 kV surge capability.
- Wide supply range: 2.25 V to 5.5 V and 2.25 V to 5.5 V level translation.
- Low power consumption, typical 1.5 mA per channel at 1 Mbps, and low propagation delay: 10.7 ns typical (5 V Supplies).
- Robust electromagnetic compatibility (EMC) with system-level ESD, EFT, and surge immunity.
- Enable pins for putting outputs in high impedance for multi-master driving applications and reducing power consumption.
- Default output high (ISO774x) and low (ISO774xF) options.
- Safety-related certifications including DIN EN IEC 60747-17, UL 1577, IEC 61010-1, IEC 62368-1, and GB 4943.1.
Applications
- Automotive systems: The ISO7740-Q1 is specifically designed for use in automotive environments, providing robust isolation and EMC performance necessary for such applications.
- Industrial control systems: Suitable for high-reliability industrial control systems that require robust isolation and low emissions.
- Medical devices: Compliant with safety standards such as IEC 60601-1, making it suitable for use in medical devices.
- High-voltage systems: Ideal for applications requiring high isolation voltages and surge capabilities.
Q & A
- What is the primary application of the ISO7740-Q1?
The ISO7740-Q1 is primarily designed for automotive applications, but it can also be used in industrial control systems, medical devices, and other high-reliability environments.
- What is the isolation voltage rating of the ISO7740-Q1?
The ISO7740-Q1 has an isolation voltage rating of up to 5000 VRMS for the DW package.
- What is the data rate of the ISO7740-Q1?
The ISO7740-Q1 supports a data rate of up to 100 Mbps.
- What is the operating temperature range of the ISO7740-Q1?
The operating temperature range is -40°C to 125°C.
- Does the ISO7740-Q1 have any safety certifications?
Yes, it has certifications such as DIN EN IEC 60747-17, UL 1577, IEC 61010-1, IEC 62368-1, and GB 4943.1.
- What is the typical power consumption of the ISO7740-Q1?
The typical power consumption is 1.5 mA per channel at 1 Mbps.
- What is the propagation delay of the ISO7740-Q1?
The propagation delay is typically 10.7 ns at 5 V supplies.
- Does the ISO7740-Q1 have ESD protection?
Yes, it has ±8 kV IEC 61000-4-2 contact discharge protection across the isolation barrier.
- Can the ISO7740-Q1 be used in multi-master driving applications?
Yes, it has enable pins that can put the respective outputs in high impedance for multi-master driving applications and reduce power consumption.
- What are the default output states of the ISO7740-Q1?
The default output is high for devices without the suffix F and low for devices with the suffix F.
