Overview
The ISO122JPE4, produced by Texas Instruments, is a precision analog isolation amplifier designed to provide high isolation and accuracy in various industrial and measurement applications. This device uses a novel duty-cycle modulation-demodulation technique to transmit the input signal digitally across a high-voltage differential capacitive barrier, ensuring excellent reliability and high-frequency transient immunity. The ISO122 is available in 16-pin plastic DIP and 28-lead plastic surface-mount packages, making it versatile for different design needs.
Key Specifications
| Parameter | Unit | Min | Typ | Max |
|---|---|---|---|---|
| Supply Voltage | V | ±4.5 | - | ±18 |
| Continuous Isolation Voltage | Vrms | - | - | 1500 |
| Junction Temperature | °C | - | - | 150 |
| Operating Temperature Range | °C | -25 | - | 85 |
| Storage Temperature Range | °C | -40 | - | 125 |
| Input Voltage Range | V | ±10 | - | ±12.5 |
| Output Voltage Range | V | ±10 | - | ±12.5 |
| Gain Error | %FSR | ±0.05 | - | ±0.50 |
| Nonlinearity | %FSR | ±0.016 | - | ±0.050 |
| Small-Signal Bandwidth | kHz | - | - | 50 |
| Slew Rate | V/μs | - | - | 2 |
| Settling Time (0.10%) | μs | - | - | 50 |
| Settling Time (0.01%) | μs | - | - | 350 |
| Quiescent Current (VS1) | mA | ±5 | - | ±7 |
| Quiescent Current (VS2) | mA | ±5.5 | - | ±7 |
Key Features
- High Isolation: Continuous isolation voltage of 1500 Vrms and transient overvoltage protection up to 1.6 × 1500 Vrms.
- Precision and Linearity: Maximum nonlinearity of ±0.020% and gain error of ±0.05% to ±0.50% FSR.
- Wide Supply Range: Operates with supply voltages from ±4.5 V to ±18 V.
- Low Quiescent Current: Quiescent currents of ±5 mA on VS1 and ±5.5 mA on VS2.
- High Frequency Response: Small-signal bandwidth of 50 kHz and slew rate of 2 V/μs.
- Robust Design: 100% tested for high-voltage breakdown and compliant with German VDE0884 Optocoupler Standards.
Applications
- Industrial Process Control: Suitable for transducer isolation, thermocouples, RTDs, pressure bridges, flow meters, and 4-mA to 20-mA loop isolation.
- Ground Loop Elimination: Effective in eliminating ground loops in various measurement systems.
- Motor and SCR Control: Used in motor and SCR control applications where isolation is critical.
- Power Monitoring: Ideal for power monitoring systems requiring high isolation and precision.
- PC-Based Data Acquisition: Suitable for PC-based data acquisition systems needing isolated analog inputs.
- Test Equipment: Used in test equipment where high isolation and accuracy are required.
Q & A
- What is the primary function of the ISO122JPE4? The ISO122JPE4 is a precision analog isolation amplifier that transmits the input signal digitally across a high-voltage differential capacitive barrier.
- What are the supply voltage ranges for the ISO122JPE4? The device operates with supply voltages from ±4.5 V to ±18 V.
- What is the maximum continuous isolation voltage of the ISO122JPE4? The maximum continuous isolation voltage is 1500 Vrms.
- What is the typical small-signal bandwidth of the ISO122JPE4? The small-signal bandwidth is 50 kHz.
- How does the ISO122JPE4 handle high-voltage testing? The ISO122JPE4 is 100% tested for high-voltage breakdown and complies with German VDE0884 Optocoupler Standards, ensuring transient overvoltage protection.
- What are the typical quiescent currents for the ISO122JPE4? The quiescent currents are ±5 mA on VS1 and ±5.5 mA on VS2.
- What is the maximum nonlinearity of the ISO122JPE4? The maximum nonlinearity is ±0.020%.
- What are some common applications of the ISO122JPE4? Common applications include industrial process control, ground loop elimination, motor and SCR control, power monitoring, PC-based data acquisition, and test equipment.
- What are the available package options for the ISO122JPE4? The device is available in 16-pin plastic DIP and 28-lead plastic surface-mount packages.
- What is the operating temperature range of the ISO122JPE4? The operating temperature range is from -25°C to 85°C.
