Overview
The ISO7840DWR, manufactured by Texas Instruments, is a high-performance, quad-channel digital isolator. This device is designed to provide robust isolation and high electromagnetic immunity, making it suitable for various industrial and critical applications. It features a wide supply range of 2.25 V to 5.5 V and operates over a temperature range of –55°C to +125°C. The ISO7840DWR is characterized by its low power consumption, with a typical current of 1.7 mA, and its ability to isolate CMOS or LVCMOS digital I/Os with a silicon-dioxide (SiO2) insulation barrier.
The device includes enable pins that allow the outputs to be put in high impedance, which is beneficial for multi-master driving applications and reducing power consumption. It has four forward and zero reverse-direction channels, with default output states that are high for the ISO7840 and low for the ISO7840F in case of input power or signal loss.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage | 2.25 | - | 5.5 | V |
| Operating Temperature | –55 | - | 125 | °C |
| Isolation Voltage | - | - | 8000 | VPK |
| Maximum Surge Isolation Voltage | - | - | 8000 | VPK |
| Signaling Rate | - | - | 100 | Mbps |
| Propagation Delay Time | - | - | 11 | ns |
| Supply Current (ICC1 + ICC2) at 5V | - | - | 23.8 | mA |
| Junction-to-Ambient Thermal Resistance | - | - | 78.9 | °C/W |
Key Features
- High-performance, quad-channel digital isolator with 8000-VPK isolation voltage.
- Wide supply range: 2.25 V to 5.5 V.
- Low power consumption: typical 1.7 mA.
- High electromagnetic immunity and low emissions.
- Enable pins for high impedance output and multi-master driving applications.
- Default output states: high for ISO7840 and low for ISO7840F upon input power or signal loss.
- Available in 16-pin SOIC wide-body (DW) and extra-wide body (DWW) packages.
- Comprehensive safety and regulatory approvals including VDE, CSA, CQC, TUV, and UL certifications.
Applications
- Industrial Automation
- Motor Control
- Power Supplies
- Solar Inverters
- Medical Equipment
- Hybrid Electric Vehicles
Q & A
- What is the isolation voltage of the ISO7840DWR?
The ISO7840DWR has an isolation voltage of 8000 VPK.
- What is the operating temperature range of the ISO7840DWR?
The operating temperature range is –55°C to +125°C.
- What are the package options for the ISO7840DWR?
The device is available in 16-pin SOIC wide-body (DW) and extra-wide body (DWW) packages.
- What are the key safety certifications for the ISO7840DWR?
The device has certifications from VDE, CSA, CQC, TUV, and UL.
- What is the typical supply current for the ISO7840DWR?
The typical supply current is 1.7 mA.
- What is the maximum signaling rate of the ISO7840DWR?
The maximum signaling rate is 100 Mbps.
- How does the enable pin function on the ISO7840DWR?
The enable pin allows the outputs to be put in high impedance, which is useful for multi-master driving applications and reducing power consumption.
- What are the default output states for the ISO7840 and ISO7840F upon input power or signal loss?
The default output state is high for the ISO7840 and low for the ISO7840F.
- What are some of the key applications for the ISO7840DWR?
Key applications include industrial automation, motor control, power supplies, solar inverters, medical equipment, and hybrid electric vehicles.
- What is the junction-to-ambient thermal resistance of the ISO7840DWR?
The junction-to-ambient thermal resistance is 78.9 °C/W.
