Overview
The ISO7740FQDBQRQ1 is a high-performance, quad-channel digital isolator from Texas Instruments, designed specifically for automotive applications. This device is part of the ISO774x-Q1 family, which is AEC-Q100 qualified and features reinforced insulation ratings. It provides high electromagnetic immunity and low emissions, making it suitable for use in harsh automotive environments. The device isolates CMOS or LVCMOS digital I/Os using a double capacitive silicon dioxide (SiO2) insulation barrier, ensuring reliable and safe operation.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Package | QSOP (DBQ-16) | 4.90mm × 3.90mm |
| Isolation Rating | 3000 VRMS (per UL 1577) | |
| Operating Temperature | -40°C to 125°C | |
| Supply Voltage | 2.25 V to 5.5 V | |
| Maximum Power Dissipation | 1499 mW (DBQ package) | |
| Thermal Resistance (RθJA) | 109 °C/W (DBQ package) | |
| Common Mode Transient Immunity (CMTI) | 85 kV/μs to 100 kV/μs | |
| Input/Output Buffer Type | CMOS or LVCMOS | |
| Enable Pins | Yes, for high impedance and power reduction | |
| Safety Certifications | DIN EN IEC 60747-17, UL 1577, IEC 61010-1, IEC 62368-1, IEC 60601-1, GB 4943.1 |
Key Features
- Qualified for automotive applications with AEC-Q100 certification.
- Reinforced insulation ratings according to VDE, CSA, TUV, and CQC standards.
- High electromagnetic immunity and low emissions.
- Low power consumption.
- Enable pins for putting outputs in high impedance and reducing power consumption.
- Default output is low for devices with the F suffix and high for devices without the F suffix if input power or signal is lost.
- Available in extra-wide SOIC (DWW-16), wide-SOIC (DW-16), and QSOP (DBQ-16) package options.
Applications
- Hybrid, electric, and powertrain systems (EV/HEV).
- Battery management systems (BMS).
- On-board chargers.
- Traction inverters.
- DC/DC converters.
- Inverter and motor control systems.
Q & A
- What is the primary application of the ISO7740FQDBQRQ1?
The ISO7740FQDBQRQ1 is primarily used in automotive applications, including hybrid, electric, and powertrain systems.
- What are the key certifications for this device?
The device is certified under AEC-Q100, DIN EN IEC 60747-17, UL 1577, IEC 61010-1, IEC 62368-1, IEC 60601-1, and GB 4943.1.
- What is the isolation rating of the ISO7740FQDBQRQ1?
The isolation rating is 3000 VRMS according to UL 1577 for the DBQ package.
- What are the package options available for this device?
The device is available in extra-wide SOIC (DWW-16), wide-SOIC (DW-16), and QSOP (DBQ-16) packages.
- How does the device handle input power or signal loss?
If the input power or signal is lost, the default output is low for devices with the F suffix and high for devices without the F suffix.
- What is the purpose of the enable pins on the ISO7740FQDBQRQ1?
The enable pins can put the respective outputs in high impedance and reduce power consumption.
- What is the common mode transient immunity (CMTI) of this device?
The CMTI is 85 kV/μs to 100 kV/μs.
- What are the thermal resistance values for the DBQ package?
The junction-to-ambient thermal resistance (RθJA) is 109 °C/W for the DBQ package.
- What is the maximum power dissipation for the DBQ package?
The maximum power dissipation is 1499 mW for the DBQ package.
- What are the typical supply current values for the ISO7740FQDBQRQ1?
The supply current values vary depending on the supply voltage and enable state, but typical values range from 1.2 mA to 7.8 mA.
