Overview
The ISO7221C-Q1 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 of up to 4000VPK per VDE. It features a silicon-dioxide (SiO2) isolation barrier, separating the logic input and output buffers. This isolation is crucial for blocking high voltage and isolating grounds, preventing noise currents from interfering with sensitive circuitry. The device is particularly useful in applications requiring high-speed data transmission and robust isolation.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Package | SOIC (D) | 8 pins |
| Operating Temperature Range | °C | -40 to 125 |
| Signaling Rate | Mbps | 1 and 25 |
| Supply Voltage | V | 2.8 (C-Grade), 3.3, or 5 |
| Channel-to-Channel Output Skew | ns | 1 max |
| Pulse-Width Distortion (PWD) | ns | 1 max |
| Jitter Content | ns | 1 typ at 25Mbps |
| Transient Immunity | kV/μs | 50k typical |
| ESD Protection | kV | 4k |
| Isolation Lifetime | Years | Typical 28 years at rated voltage |
| Safety Certifications | DIN EN IEC 60747-17, UL 1577, IEC 61010-1, IEC 62368-1 |
Key Features
- 1 and 25Mbps signaling rate options
- Low channel-to-channel output skew; 1ns max
- Low pulse-width distortion (PWD); 1ns max
- Low jitter content; 1ns typ at 25Mbps
- 50kV/μs typical transient immunity
- Operates with 2.8V (C-Grade), 3.3V, or 5V supplies
- 4kV ESD protection
- –40°C to +125°C operating range
- Typical 28-year life at rated voltage
- Safety-related certifications including DIN EN IEC 60747-17, UL 1577, IEC 61010-1, and IEC 62368-1
Applications
- Factory Automation: Modbus, Profibus™, DeviceNet™ data buses
- Computer Peripheral Interface
- Servo Control Interface
- Data Acquisition
Q & A
- What is the primary function of the ISO7221C-Q1?
The ISO7221C-Q1 is a dual-channel digital isolator designed to provide galvanic isolation of digital signals, protecting sensitive circuitry from high voltage and noise currents.
- What are the available signaling rates for the ISO7221C-Q1?
The device supports signaling rates of 1 and 25 Mbps.
- What are the operating supply voltages for the ISO7221C-Q1?
The device operates with 2.8V (C-Grade), 3.3V, or 5V supplies.
- What is the operating temperature range of the ISO7221C-Q1?
The device operates over a temperature range of –40°C to +125°C.
- What safety certifications does the ISO7221C-Q1 have?
The device is certified according to DIN EN IEC 60747-17, UL 1577, IEC 61010-1, and IEC 62368-1.
- What is the typical isolation lifetime of the ISO7221C-Q1?
The device has a typical isolation lifetime of 28 years at rated voltage.
- What is the ESD protection level of the ISO7221C-Q1?
The device has 4kV ESD protection.
- What is the transient immunity of the ISO7221C-Q1?
The device has a typical transient immunity of 50kV/μs.
- In what applications is the ISO7221C-Q1 commonly used?
The device is commonly used in factory automation, computer peripheral interfaces, servo control interfaces, and data acquisition systems.
- What package type and pin count does the ISO7221C-Q1 have?
The device comes in an SOIC (D) package with 8 pins.
