Overview
The Texas Instruments ISO7221ADR is a dual-channel digital isolator designed to provide robust electrical isolation and reliable signal transmission between two circuits. This device is part of the ISO7221x family, which features capacitive isolation technology to achieve high-speed data rates while maintaining high isolation voltage. The ISO7221ADR is particularly useful in applications where electrical noise or potential differences between circuits must be isolated for safe operation.
The device operates with logic input and output buffers separated by TI’s silicon-dioxide (SiO2) isolation barrier, providing galvanic isolation of up to 4000 VPK per VDE. It is used in conjunction with isolated power supplies to block high voltage, isolate grounds, and prevent noise currents from interfering with or damaging sensitive circuitry.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | SOIC (D) | - |
| Pins | 8 | - |
| Operating Temperature Range | -40 to 125 | °C |
| Data Rate | Up to 150 Mbps | Mbps |
| Channel-to-Channel Output Skew | 1 ns Max | ns |
| Pulse Width Distortion (PWD) | 1 ns Max | ns |
| Jitter Content | 1 ns Typ at 150 Mbps | ns |
| Transient Immunity | 50 kV/μs Typ | kV/μs |
| Supply Voltage | 2.8 V, 3.3 V, 5 V | V |
| ESD Protection | 4 kV | V |
| Isolation Voltage | 2500 Vrms | Vrms |
| Propagation Delay (TPLH / TPHL) | 475 ns, 475 ns | ns |
| Rise / Fall Time | 1 ns, 1 ns | ns |
Key Features
- High-speed data rates up to 150 Mbps
- Low channel-to-channel output skew and pulse width distortion (1 ns Max each)
- Low jitter content (1 ns Typ at 150 Mbps)
- High transient immunity (50 kV/μs Typ)
- Operates with 2.8 V, 3.3 V, or 5 V supplies
- 4 kV ESD protection
- High electromagnetic immunity
- Compact SOIC-8 package, RoHS compliant
- Safety-related certifications: DIN EN IEC 60747-17 (VDE 0884-17), UL 1577, IEC 61010-1, IEC 62368-1
Applications
- Industrial automation
- Motor control
- Power management
- Systems requiring electrical isolation and noise protection
- High-performance, isolated systems where safety and efficiency are critical
Q & A
- What is the primary function of the ISO7221ADR?
The ISO7221ADR is a dual-channel digital isolator designed to provide robust electrical isolation and reliable signal transmission between two circuits.
- What are the available data rates for the ISO7221ADR?
The device supports data rates up to 150 Mbps.
- What is the operating temperature range of the ISO7221ADR?
The device operates over a temperature range of -40°C to 125°C.
- What supply voltages does the ISO7221ADR support?
The device can operate with 2.8 V, 3.3 V, or 5 V supplies.
- What is the isolation voltage of the ISO7221ADR?
The device provides an isolation voltage of up to 2500 Vrms.
- Does the ISO7221ADR have ESD protection?
Yes, the device has 4 kV ESD protection.
- Is the ISO7221ADR RoHS compliant?
Yes, the device is RoHS compliant.
- What are some common applications for the ISO7221ADR?
Common applications include industrial automation, motor control, and power management.
- What safety certifications does the ISO7221ADR have?
The device has certifications such as DIN EN IEC 60747-17 (VDE 0884-17), UL 1577, IEC 61010-1, and IEC 62368-1.
- What is the package type of the ISO7221ADR?
The device is packaged in an 8-pin SOIC (D) package.
