Overview
The ISO124P, produced by Texas Instruments, is a precision, low-cost isolated amplifier designed for a wide range of applications requiring high input impedance and isolation. This device incorporates a novel duty cycle modulation-demodulation technique, ensuring excellent reliability and high-frequency transient immunity across the isolation barrier. The ISO124P is part of the ISO124 family, known for its precision voltage sensing capabilities and robust isolation features.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage | ±4.5 | ±18 | V | |
| Analog Input Voltage, VIN | 100 | V | ||
| Continuous Isolation Voltage | 1500 | Vrms | ||
| Junction Temperature | 125 | °C | ||
| Storage Temperature, Tstg | -40 | 125 | °C | |
| Isolation Mode Rejection (60 Hz) | 140 | dB |
Key Features
- Precision Isolation Amplifier: Incorporates a novel duty cycle modulation-demodulation technique for high reliability and transient immunity.
- High Input Impedance: Suitable for applications requiring high input impedance.
- Low Cost: Designed to be a cost-effective solution for isolation amplifier needs.
- Digital Modulation: The signal is transmitted digitally across a 2-pF differential capacitive barrier, ensuring signal integrity.
- Robust Isolation: Continuous isolation voltage of up to 1500 Vrms and high isolation mode rejection of 140 dB at 60 Hz.
- Wide Operating Range: Supply voltage range from ±4.5 V to ±18 V and operating temperature range from -40°C to 125°C.
Applications
- Industrial Process Control: Transducer isolator, isolator for thermocouples, RTDs, pressure bridges, and flow meters, 4-mA to 20-mA loop isolation.
- Ground Loop Elimination: Effective in eliminating ground loops in various industrial and measurement applications.
- Motor and SCR Control: Used in motor control and SCR (Silicon-Controlled Rectifier) applications.
- Power Monitoring: Suitable for monitoring power in various industrial and electrical systems.
- PC-Based Data Acquisition: Used in data acquisition systems connected to PCs.
- Test Equipment: Employed in various test and measurement equipment due to its precision and isolation capabilities.
Q & A
- What is the primary function of the ISO124P?
The ISO124P is a precision isolation amplifier designed to isolate and amplify analog signals while providing high reliability and transient immunity.
- What is the supply voltage range for the ISO124P?
The supply voltage range for the ISO124P is from ±4.5 V to ±18 V.
- What is the maximum continuous isolation voltage of the ISO124P?
The maximum continuous isolation voltage of the ISO124P is 1500 Vrms.
- What are the typical applications of the ISO124P?
The ISO124P is used in industrial process control, ground loop elimination, motor and SCR control, power monitoring, PC-based data acquisition, and test equipment.
- How does the ISO124P ensure signal integrity across the isolation barrier?
The ISO124P uses a novel duty cycle modulation-demodulation technique to transmit the signal digitally across a 2-pF differential capacitive barrier, ensuring signal integrity.
- What is the operating temperature range of the ISO124P?
The operating temperature range of the ISO124P is from -40°C to 125°C.
- What is the isolation mode rejection of the ISO124P at 60 Hz?
The isolation mode rejection of the ISO124P at 60 Hz is 140 dB.
- Is the ISO124P suitable for high-frequency applications?
Yes, the ISO124P has good high-frequency transient immunity due to its digital modulation technique.
- How many transistors does the ISO124P contain?
The ISO124P contains 250 transistors.
- What standards does the ISO124P comply with for high-voltage testing?
The ISO124P complies with the German VDE0884 Optocoupler Standards for high-voltage testing.
