Overview
The ISO7221ADG4 is a dual-channel digital isolator from Texas Instruments, part of the ISO7221x family. These devices are 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 the device suitable for applications requiring high voltage and ground isolation. The ISO7221ADG4 operates with supply voltages of 2.8V, 3.3V, or 5V and is characterized for operation over a wide ambient temperature range of –40°C to +125°C.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage (VCC1, VCC2) | 2.8, 3.3, 5 | V |
| Signaling Rate Options | 1, 5, 25, 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 |
| ESD Protection | ±4000 V (HBM), ±1000 V (CDM) | V |
| Operating Temperature Range | –40°C to +125°C | °C |
| Package Type | SOIC (D), 8 Pins | |
| Maximum Junction Temperature | 170°C | °C |
Key Features
- 1, 5, 25, and 150 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 150 Mbps
- 50 kV/μs typical transient immunity
- Operates with 2.8V (C-Grade), 3.3V, or 5V supplies
- 4 kV ESD protection
- High electromagnetic immunity
- –40°C to +125°C operating range
- TTL input thresholds with noise filter (A, B, C options) and CMOS VCC/2 input thresholds (M option)
- Safety-related certifications: DIN EN IEC 60747-17, UL 1577, IEC 61010-1, IEC 62368-1
Applications
The ISO7221ADG4 is suitable for various applications requiring high isolation and reliability, such as:
- Industrial control systems
- Medical devices
- Automotive systems
- Power supplies and DC-DC converters
- Data acquisition and sensor systems
- Mixed-signal microcontrollers and digital-to-analog converters
Q & A
- What is the primary function of the ISO7221ADG4?
The ISO7221ADG4 is a dual-channel digital isolator that provides galvanic isolation between logic input and output buffers.
- What are the available signaling rate options for the ISO7221ADG4?
The device supports signaling rates of 1, 5, 25, and 150 Mbps.
- What are the supported supply voltages for the ISO7221ADG4?
The device operates with supply voltages of 2.8V, 3.3V, or 5V.
- What is the operating temperature range of the ISO7221ADG4?
The device operates over a temperature range of –40°C to +125°C.
- What kind of ESD protection does the ISO7221ADG4 offer?
The device offers ±4000 V (HBM) and ±1000 V (CDM) ESD protection.
- What safety certifications does the ISO7221ADG4 have?
The device is certified to DIN EN IEC 60747-17, UL 1577, IEC 61010-1, and IEC 62368-1 standards.
- What is the maximum junction temperature for the ISO7221ADG4?
The maximum junction temperature is 170°C.
- What is the package type and pin count of the ISO7221ADG4?
The device is packaged in an 8-pin SOIC (D) package.
- How does the ISO7221ADG4 handle transient immunity?
The device has a typical transient immunity of 50 kV/μs.
- What are some common applications for the ISO7221ADG4?
The device is used in industrial control systems, medical devices, automotive systems, power supplies, and data acquisition systems.
