Overview
The ISO7840DWWR is a high-performance, quad-channel digital isolator manufactured by Texas Instruments. This device is designed to provide robust signal isolation with a 8000-V peak (PK) isolation voltage, making it suitable for applications requiring high electromagnetic immunity and low emissions. The ISO7840DWWR isolates CMOS or LVCMOS digital I/Os using a silicon-dioxide (SiO2) insulation barrier, ensuring safe and efficient electrical isolation in various digital interfaces.
The device features enable pins that allow the outputs to be put in high impedance for multi-master driving applications and to reduce power consumption. It is available in 16-pin SOIC wide-body (DW) and extra-wide body (DWW) packages, enhancing its versatility in different circuit designs.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Isolation Voltage | 8000 | V PK |
| Signaling Rate | Up to 100 | Mbps |
| Supply Voltage Range | 2.25 to 5.5 | V |
| Operating Temperature Range | -55 to 125 | °C |
| Power Consumption (Typical per Channel at 1 Mbps) | 1.7 | mA |
| Propagation Delay (Typical at 5-V Supplies) | 11 | ns |
| Package Type | SOIC-16 (DW and DWW) | |
| Number of Channels | 4 (Forward), 0 (Reverse) | |
| Default Output on Power Loss | High for ISO7840, Low for ISO7840F |
Key Features
- High electromagnetic immunity and low emissions
- Low-power consumption, typical 1.7 mA per channel at 1 Mbps
- Low propagation delay, 11 ns typical at 5-V supplies
- Industry-leading CMTI (Common Mode Transient Immunity): ±100 kV/µs
- System-level ESD, EFT, and surge immunity
- Isolation barrier life: >40 years
- Wide supply range: 2.25 V to 5.5 V, with 2.25-V to 5.5-V level translation
- Enable pins for high impedance output and reduced power consumption
- Reinforced isolation certifications according to VDE, CSA, CQC, and TUV
Applications
- Industrial Automation
- Motor Control
- Power Supplies
- Solar Inverters
- Medical Equipment
- Hybrid Electric Vehicles
The ISO7840DWWR is used in conjunction with isolated power supplies to prevent noise currents from interfering with or damaging sensitive circuitry, making it an essential component in various industrial, medical, and telecom applications.
Q & A
- What is the isolation voltage of the ISO7840DWWR?
The isolation voltage of the ISO7840DWWR is 8000 V PK.
- What is the signaling rate of the ISO7840DWWR?
The signaling rate of the ISO7840DWWR is up to 100 Mbps.
- What is the operating temperature range of the ISO7840DWWR?
The operating temperature range of the ISO7840DWWR is -55°C to 125°C.
- How many channels does the ISO7840DWWR have?
The ISO7840DWWR has four forward channels and zero reverse channels.
- What is the default output state if the input power or signal is lost?
The default output state is high for the ISO7840 device and low for the ISO7840F device.
- What are the safety and regulatory approvals for the ISO7840DWWR?
The device has certifications according to VDE, CSA, CQC, and TUV, including UL 1577, IEC 60950-1, and IEC 60601-1.
- What package types are available for the ISO7840DWWR?
The ISO7840DWWR is available in 16-pin SOIC wide-body (DW) and extra-wide body (DWW) packages.
- What is the typical power consumption per channel at 1 Mbps?
The typical power consumption per channel at 1 Mbps is 1.7 mA.
- What is the propagation delay of the ISO7840DWWR at 5-V supplies?
The propagation delay is 11 ns typical at 5-V supplies.
- What is the industry-leading CMTI of the ISO7840DWWR?
The industry-leading CMTI is ±100 kV/µs.
