Overview
The ISO7421FEDR is a dual-channel digital isolator produced by Texas Instruments. This device provides galvanic isolation up to 2500 V RMS for 1 minute per UL 1577 and 4242 V PK per VDE, ensuring robust protection against noise and electrical interference. It features two isolated channels, each with a logic input and output buffer separated by a silicon dioxide (SiO2) insulation barrier. The ISO7421FEDR is designed to operate in conjunction with isolated power supplies to prevent noise currents from interfering with or damaging sensitive circuitry. The device has TTL input thresholds and operates from 3-V to 5.5-V supply levels, making it versatile for various applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Data Rate (Max) | 50 | Mbps |
| Default Output | Low | |
| Forward/Reverse Channels | 1/1 | |
| Isolation Rating | 2500 | Vrms |
| Number of Channels | 2 | |
| Operating Temperature Range | -40 to 125 | °C |
| Package Type | SOIC (D) | |
| Package Pins | 8 | |
| Propagation Delay (Typical) | 7 | ns |
| Surge Voltage Rating | 4000 | Vpk |
| VCC (Min/Max) | 3.3 / 5.5 | V |
Key Features
- Signaling Rate > 50 Mbps
- Default Output 'Low' for devices with suffix 'F'
- Low Power Consumption: Typical ICC per channel (3.3-V Supplies) - 1.8 mA at 1 Mbps, 2.8 mA at 25 Mbps
- Low Propagation Delay: 7 ns Typical
- Low Pulse Skew: 200 ps Typical
- Wide Operating Temperature Range: –40°C to 125°C
- 50-KV/μs Transient Immunity, Typical
- Isolation Barrier Life: > 25 Years
- Operates from 3-V to 5.5-V Supply Levels
- 3.3-V and 5-V Level Translation
- Narrow Body SOIC-8 Package
- Safety and Regulatory Approvals: UL 1577, VDE V 0884-10, DIN EN 61010-1, CSA, IEC 60950-1, IEC 61010-1, CQC Certification per GB4943.1-2011
Applications
The ISO7421FEDR is suitable for a variety of applications where galvanic isolation is crucial, such as:
- Industrial control systems
- Medical devices requiring isolation
- Automotive systems
- Communication systems
- Power supplies and DC-DC converters
- Test and measurement equipment
It is particularly useful in scenarios where noise currents or electrical interference could compromise the integrity of the system.
Q & A
- What is the maximum data rate of the ISO7421FEDR?
The maximum data rate of the ISO7421FEDR is 50 Mbps.
- What is the default output state of the ISO7421FEDR in case of input power or signal loss?
The default output state is 'low' for devices with the suffix 'F'.
- What is the operating temperature range of the ISO7421FEDR?
The operating temperature range is –40°C to 125°C.
- What type of package does the ISO7421FEDR come in?
The ISO7421FEDR comes in a SOIC (D) package with 8 pins.
- What is the typical propagation delay of the ISO7421FEDR?
The typical propagation delay is 7 ns.
- Does the ISO7421FEDR have integrated isolated power?
No, the ISO7421FEDR does not have integrated isolated power.
- What are the safety and regulatory approvals for the ISO7421FEDR?
The device has approvals from UL 1577, VDE V 0884-10, DIN EN 61010-1, CSA, IEC 60950-1, IEC 61010-1, and CQC Certification per GB4943.1-2011.
- What is the isolation rating of the ISO7421FEDR?
The isolation rating is 2500 Vrms for 1 minute and 4242 Vpk.
- Can the ISO7421FEDR operate with both 3.3-V and 5-V supply levels?
- What is the typical power consumption of the ISO7421FEDR at 1 Mbps and 25 Mbps?
The typical power consumption is 1.8 mA at 1 Mbps and 2.8 mA at 25 Mbps.
