Overview
The ISO7341FCQDWRQ1 is a part of the ISO734x-Q1 family of devices from Texas Instruments, designed to provide robust electromagnetic compatibility (EMC) and low-power operation. This quad-channel digital isolator offers galvanic isolation up to 3000 VRMS for 1 minute per UL 1577 and 4242 VPK per VDE V 0884-10, making it suitable for harsh industrial environments. The device features four isolated channels, with three channels in the forward direction and one channel in the reverse direction, separated by a silicon dioxide (SiO2) insulation barrier.
The ISO7341FCQDWRQ1 operates from 3-V to 5.5-V supply levels and includes integrated noise filters to handle short noise pulses. It is designed to prevent noise currents from interfering with or damaging sensitive circuitry and is compatible with various industrial fieldbus and control systems.
Key Specifications
| Parameter | Test Conditions | MIN | TYP | MAX | UNIT |
|---|---|---|---|---|---|
| VCC (Supply Voltage) | -0.5 | 6 | V | ||
| INx, OUTx, ENx (Input/Output/Enable Voltage) | -0.5 | 6 | V | ||
| Maximum Power Dissipation (Both Sides) | VCC1 = VCC2 = 5.5 V, TJ = 150°C, CL = 15 pF | 102 | mW | ||
| Propagation Delay Time (tPLH, tPHL) | VCC1 and VCC2 at 3.3 V ± 10% | 22 | 35 | 66 | ns |
| Output Signal Rise Time (tr) | VCC1 and VCC2 at 3.3 V ± 10% | 2.1 | ns | ||
| Output Signal Fall Time (tf) | VCC1 and VCC2 at 3.3 V ± 10% | 1.7 | ns | ||
| Junction-to-Ambient Thermal Resistance (RθJA) | 78.4 | °C/W |
Key Features
- Galvanic isolation up to 3000 VRMS for 1 minute per UL 1577 and 4242 VPK per VDE V 0884-10
- Four isolated channels with three forward and one reverse-direction channel
- Integrated noise filters for harsh industrial environments
- TTL input thresholds and operation from 3-V to 5.5-V supply levels
- Enhanced electromagnetic compatibility (EMC) for system-level ESD, EFT, surge, and emissions compliance
- Fail-safe output default (low or high) depending on the part number suffix
- Compliance with various safety certifications including VDE, CSA, UL, and CQC
Applications
- Optocoupler replacement in industrial fieldbus systems (e.g., Profibus, Modbus, DeviceNet)
- Servo control interfaces
- Motor control systems
- Power supplies and battery packs
- Industrial automation and control systems
Q & A
- What is the maximum galvanic isolation provided by the ISO7341FCQDWRQ1?
The ISO7341FCQDWRQ1 provides galvanic isolation up to 3000 VRMS for 1 minute per UL 1577 and 4242 VPK per VDE V 0884-10.
- How many isolated channels does the ISO7341FCQDWRQ1 have?
The device has four isolated channels, with three channels in the forward direction and one channel in the reverse direction.
- What are the operating supply voltage ranges for the ISO7341FCQDWRQ1?
The device operates from 3-V to 5.5-V supply levels.
- What type of input thresholds does the ISO7341FCQDWRQ1 have?
The device has TTL input thresholds.
- What is the purpose of the integrated noise filters in the ISO7341FCQDWRQ1?
The integrated noise filters are designed to handle short noise pulses in harsh industrial environments.
- What are some of the safety certifications that the ISO7341FCQDWRQ1 complies with?
The device is certified according to VDE, CSA, UL, and CQC standards.
- What is the typical propagation delay time for the ISO7341FCQDWRQ1?
The typical propagation delay time is around 35 ns.
- How does the ISO7341FCQDWRQ1 handle fail-safe output conditions?
The device has fail-safe output defaults that can be either low or high, depending on the part number suffix.
- What is the junction-to-ambient thermal resistance (RθJA) of the ISO7341FCQDWRQ1?
The RθJA is 78.4 °C/W.
- In which types of systems is the ISO7341FCQDWRQ1 commonly used?
The device is commonly used in industrial fieldbus systems, servo control interfaces, motor control systems, power supplies, and battery packs.
