Overview
The ISO7021FDR is an ultra-low power, two-channel digital isolator produced by Texas Instruments. This device is designed to provide high isolation and low power consumption, making it suitable for a variety of applications where galvanic isolation is required. The ISO7021FDR features a double capacitive silicon dioxide (SiO2) insulation barrier, ensuring a high level of electrical isolation and safety. It operates over a wide supply voltage range from 1.71V to 5.5V and is certified by various safety standards including DIN EN IEC 60747-17, UL 1577, IEC 62368-1, and IECEx/ATEX.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| Supply Voltage (VCC1, VCC2) | -0.5 | - | 6 | V |
| Input/Output Voltage | -0.5 | - | VCCX + 0.5 | V |
| Data Rate | 0 | - | 4 Mbps | - |
| Ambient Temperature | -55 | - | 125 | °C |
| Isolation Voltage | - | - | 3000 VRMS | - |
| Package Type | - | - | 8-SOIC | - |
| Quiescent Current per Channel (3.3V) | 4.8 | - | - | μA |
| Dynamic Current per Channel (3.3V, 1Mbps) | - | - | 120 μA | - |
Key Features
- Ultra-low power consumption: 4.8μA per channel quiescent current at 3.3V and up to 120μA per channel at 1Mbps.
- High isolation rating: 3000VRMS per UL1577 and 4242VPK.
- Wide supply voltage range: 1.71V to 5.5V.
- Safety-related certifications: DIN EN IEC 60747-17, UL 1577, IEC 62368-1, IECEx/ATEX.
- Low emissions and high common mode transient immunity (CMTI): 100kV/μs.
- Double capacitive silicon dioxide (SiO2) insulation barrier.
Applications
- 4mA to 20mA loop powered field transmitters.
- Factory automation and process automation.
- Low-power GPIO, UART isolation.
Q & A
- What is the primary function of the ISO7021FDR? The ISO7021FDR is a two-channel digital isolator designed to provide galvanic isolation for digital signals while consuming ultra-low power.
- What is the isolation voltage rating of the ISO7021FDR? The isolation voltage rating is 3000 VRMS per UL1577 and 4242 VPK.
- What are the safety certifications for the ISO7021FDR? The device is certified according to DIN EN IEC 60747-17, UL 1577, IEC 62368-1, and IECEx/ATEX standards.
- What is the typical quiescent current consumption of the ISO7021FDR at 3.3V? The quiescent current consumption is 4.8μA per channel at 3.3V.
- What is the maximum data rate supported by the ISO7021FDR? The maximum data rate supported is 4 Mbps.
- What is the operating temperature range of the ISO7021FDR? The device operates over an ambient temperature range of -55°C to 125°C.
- What type of package does the ISO7021FDR come in? The device comes in an 8-SOIC package.
- Does the ISO7021FDR support different supply voltages on each side of the isolation barrier? Yes, the device can operate with different supply voltages on each side of the isolation barrier, ranging from 1.71V to 5.5V.
- What is the common mode transient immunity (CMTI) of the ISO7021FDR? The CMTI is 100kV/μs).
- What are some typical applications of the ISO7021FDR? Typical applications include 4mA to 20mA loop powered field transmitters, factory automation, process automation, and low-power GPIO, UART isolation).
