Overview
The ISO122JP, produced by Texas Instruments, is a precision isolation amplifier that utilizes a novel duty cycle modulation-demodulation technique. This device is designed to transmit the input signal digitally across a high-voltage differential capacitive barrier, ensuring excellent reliability and high-frequency transient immunity. The ISO122JP is easy to use, requiring no external components for operation, and is suitable for a wide range of applications due to its flexible power supply range and low quiescent currents.
Key Specifications
| Parameter | Unit | Min | Max | |
|---|---|---|---|---|
| Supply Voltage | V | ±4.5 | ±15 | ±18 |
| Continuous Isolation Voltage | Vrms | 1500 | ||
| Junction Temperature | °C | 150 | ||
| Operating Temperature Range | °C | -25 | 85 | |
| Storage Temperature Range | °C | -40 | 125 | |
| Maximum Nonlinearity | % | 0.020% | ||
| Signal Bandwidth | kHz | 50 | ||
| VOS Drift | V/°C | 200 | ||
| Quiescent Current (VS1) | mA | 5 | 7 | |
| Quiescent Current (VS2) | mA | ±5.5 | ±7 | |
| Isolation Mode Rejection | dB | 140 | ||
| Barrier Impedance | Ω || pF | 10^14 || 2 | ||
| Leakage Current at 60Hz | µArms | 0.18 | 0.5 | |
| Nominal Gain | V/V | 1 | ||
| Gain Error | %FSR | ±0.05 | ±0.50 | |
| Gain vs Temperature | ppm/°C | ±10 |
Key Features
- 100% Tested for High-Voltage Breakdown
- Rated 1500 Vrms continuous isolation voltage
- High Isolation Mode Rejection (IMR): 140 dB at 60 Hz
- Bipolar Operation: VOUT = ±10 V
- Available in 16-pin plastic DIP and 28-lead plastic SOIC packages
- Ease of Use: Fixed Unity Gain Configuration
- 0.020% Maximum Nonlinearity
- ±4.5-V to ±18-V Supply Range
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
- Motor and SCR Control
- Power Monitoring
- PC-Based Data Acquisition
- Test Equipment
Q & A
- What is the ISO122JP used for?
The ISO122JP is a precision isolation amplifier used in various applications such as industrial process control, ground loop elimination, motor and SCR control, power monitoring, and more.
- What is the continuous isolation voltage rating of the ISO122JP?
The ISO122JP is rated for 1500 Vrms continuous isolation voltage.
- What are the package options for the ISO122JP?
The ISO122JP is available in 16-pin plastic DIP and 28-lead plastic SOIC packages.
- What is the maximum nonlinearity of the ISO122JP?
The maximum nonlinearity of the ISO122JP is 0.020%.
- What is the signal bandwidth of the ISO122JP?
The signal bandwidth of the ISO122JP is 50 kHz.
- What is the power supply range for the ISO122JP?
The power supply range for the ISO122JP is ±4.5 V to ±18 V.
- Does the ISO122JP require external components for operation?
No, the ISO122JP does not require external components for operation.
- What is the isolation mode rejection (IMR) of the ISO122JP at 60 Hz?
The isolation mode rejection (IMR) of the ISO122JP at 60 Hz is 140 dB.
- What is the quiescent current of the ISO122JP on VS1 and VS2?
The quiescent current on VS1 is 5 mA to 7 mA, and on VS2 it is ±5.5 mA to ±7 mA.
- Is the ISO122JP suitable for high-frequency transient immunity?
Yes, the ISO122JP is designed to provide excellent high-frequency transient immunity due to its digital modulation technique.
