Overview
The ISO7221AQDRQ1 is a dual-channel digital isolator produced by Texas Instruments. This device is part of the ISO7220x-Q1 and ISO7221x-Q1 family, designed to provide galvanic isolation between logic input and output buffers using TI’s silicon-dioxide (SiO2) isolation barrier. This barrier ensures isolation of up to 4000VPK per VDE, making it suitable for applications requiring high voltage and ground isolation. The device operates over a wide temperature range of –40°C to +125°C and is characterized for use in various safety-critical applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | SOIC (D) | - |
| Pins | 8 | - |
| Operating Temperature Range | –40 to 125 | °C |
| Signaling Rate Options | 1 Mbps, 25 Mbps | - |
| Channel-to-Channel Output Skew | 1 ns Max | - |
| Pulse-Width Distortion (PWD) | 1 ns Max | - |
| Jitter Content | 1 ns Typ at 25 Mbps | - |
| Transient Immunity | 50 kV/μs Typ | - |
| Supply Voltages | 2.8 V (C-Grade), 3.3 V, 5 V | - |
| ESD Protection | 4 kV | - |
| Output Current | ±15 mA | - |
| Maximum Junction Temperature | 150 °C | - |
| Storage Temperature | –65 to 150 °C | - |
Key Features
- 1 and 25 Mbps signaling rate options
- Low channel-to-channel output skew; 1 ns Max
- Low pulse-width distortion (PWD); 1 ns Max
- Low jitter content; 1 ns Typ at 25 Mbps
- 50 kV/μs typical transient immunity
- Operates with 2.8 V (C-Grade), 3.3 V, or 5 V supplies
- 4 kV ESD protection
- –40°C to +125°C operating range
- Typical 28-year life at rated voltage
- Safety-related certifications: DIN EN IEC 60747-17 (VDE 0884-17), UL 1577 component recognition program, IEC 61010-1, IEC 62368-1
Applications
- Factory Automation: Modbus, Profibus™, DeviceNet™ data buses
- Computer Peripheral Interface
- Servo Control Interface
- Data Acquisition
Q & A
- What is the ISO7221AQDRQ1 used for?
The ISO7221AQDRQ1 is a dual-channel digital isolator used to provide galvanic isolation between logic input and output buffers, protecting against high voltage and noise currents.
- What are the signaling rate options for the ISO7221AQDRQ1?
The device supports signaling rates of 1 Mbps and 25 Mbps.
- What is the operating temperature range of the ISO7221AQDRQ1?
The device operates over a temperature range of –40°C to +125°C.
- What are the supply voltage options for the ISO7221AQDRQ1?
The device can operate with 2.8 V (C-Grade), 3.3 V, or 5 V supplies.
- What kind of ESD protection does the ISO7221AQDRQ1 offer?
The device offers 4 kV ESD protection.
- What safety certifications does the ISO7221AQDRQ1 have?
The device has certifications such as DIN EN IEC 60747-17 (VDE 0884-17), UL 1577 component recognition program, IEC 61010-1, and IEC 62368-1.
- What is the typical life expectancy of the ISO7221AQDRQ1 at rated voltage?
The device has a typical life expectancy of 28 years at rated voltage.
- What kind of transient immunity does the ISO7221AQDRQ1 offer?
The device offers 50 kV/μs typical transient immunity.
- How does the ISO7221AQDRQ1 handle input signal conditioning?
The device conditions the binary input signal, translates it to a balanced signal, and then differentiates it by the capacitive isolation barrier.
- What are some common applications of the ISO7221AQDRQ1?
Common applications include factory automation, computer peripheral interfaces, servo control interfaces, and data acquisition.
