Overview
The ISO7242ADWR is a quad-channel digital isolator produced by Texas Instruments. This device is part of the ISO7242 series, which features multiple channel configurations and output enable functions. It is designed to provide galvanic isolation between the input and output logic buffers, using Texas Instruments' silicon dioxide (SiO2) isolation barrier. This isolation is crucial for blocking high voltages, isolating grounds, and preventing noise currents from interfering with sensitive circuitry. The ISO7242ADWR is particularly configured with two channels in each direction, making it versatile for various applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage (VCC1, VCC2) | –0.5 to 6 | V |
| Input Voltage (IN, OUT, EN) | –0.5 to 6 | V |
| Output Current | ±15 | mA |
| Signaling Rate | 1 Mbps | |
| Propagation Delay | 40 - 100 ns | ns |
| Pulse-Width Distortion (PWD) | 11 ns | ns |
| Operating Temperature Range | –40°C to 125°C | °C |
| Isolation Voltage | 4000-Vpeak, 560-Vpeak working voltage | V |
| ESD Protection | 4 kV | |
| Certifications | UL 1577 Certified |
Key Features
- Quad-channel digital isolator with two channels in each direction.
- High electromagnetic immunity and low channel-to-channel output skew.
- Low pulse-width distortion and jitter content.
- Operates with 3.3-V or 5-V supplies on either side.
- Signal input pins are 5-V tolerant regardless of the voltage supply level.
- TTL input thresholds with a noise-filter at the input to prevent transient pulses.
- Failsafe circuit drives the output to a logic high state if the input is unpowered or not actively driven.
- Typical 25-year life at rated working voltage.
Applications
- Industrial Fieldbus.
- Computer Peripheral Interface.
- Servo Control Interface.
- Data Acquisition.
- Other applications requiring high isolation and low noise interference.
Q & A
- What is the primary function of the ISO7242ADWR?
The ISO7242ADWR is a quad-channel digital isolator designed to provide galvanic isolation between input and output logic buffers.
- What are the signaling rate options for the ISO7242ADWR?
The ISO7242ADWR has a signaling rate of 1 Mbps.
- What is the operating temperature range of the ISO7242ADWR?
The operating temperature range is –40°C to 125°C.
- What is the isolation voltage of the ISO7242ADWR?
The isolation voltage is 4000-Vpeak with a working voltage of 560-Vpeak.
- Is the ISO7242ADWR certified by any standards?
- What type of input thresholds does the ISO7242ADWR have?
The ISO7242ADWR has TTL input thresholds with a noise-filter at the input.
- Can the ISO7242ADWR operate with different voltage supplies?
- What happens if the input is unpowered or not actively driven?
The failsafe circuit drives the output to a logic high state.
- What is the typical lifespan of the ISO7242ADWR at rated working voltage?
The typical lifespan is 25 years.
- What kind of ESD protection does the ISO7242ADWR have?
The device has 4 kV ESD protection.
