Overview
The Texas Instruments ISO122PG4 is a precision isolation amplifier designed for high-performance applications requiring noise-free isolation. This device is part of the Instrumentation, OP Amps, Buffer Amps family within the Linear category of integrated circuits. It operates as a single instrumentation amplifier with a high gain, low offset voltage, and a high common-mode rejection ratio. The ISO122PG4 is engineered to address critical issues such as electromagnetic interference (EMI), electrostatic discharge (ESD), and thermal requirements, making it an essential component for various precision and accuracy-demanding applications.
Key Specifications
| Parameter | Unit | Min | Max | |
|---|---|---|---|---|
| Isolation Voltage (Continuous AC, 60Hz) | Vac | 1500 | 1500 | 1500 |
| Isolation Mode Rejection (60Hz) | dB | 140 | 140 | 140 |
| Barrier Impedance | Ω || pF | 10^14 || 2 | 10^14 || 2 | 10^14 || 2 |
| Leakage Current at 60Hz | µArms | 0.18 | 0.5 | 0.5 |
| Nominal Gain | V/V | 1 | 1 | 1 |
| Gain Error | %FSR | ±0.05 | ±0.50 | ±0.50 |
| Gain vs Temperature | ppm/°C | ±10 | ±10 | ±10 |
| Supply Voltage Range | V | ±4.5 to ±18 | ||
| Quiescent Current (VS1, VS2) | mA | 5, ±5.5 | ||
| Operating Temperature Range | °C | -25 to 85 | ||
| Signal Bandwidth | kHz | 50 | ||
| Output Slew Rate | V/µs | 2 | ||
| Input Offset Voltage | mV | 20 | ||
| Package Type | 16-PDIP |
Key Features
- High Isolation Voltage: Rated for 1500 Vrms continuous AC at 60Hz and 2400 Vrms for 1 second test.
- Low Nonlinearity: Maximum nonlinearity of 0.020%.
- High Signal Bandwidth: 50 kHz signal bandwidth.
- Low Offset Voltage Drift: 200 V/°C VOS drift.
- Wide Supply Voltage Range: Operates from ±4.5 V to ±18 V.
- Low Quiescent Current: Quiescent currents of 5 mA on VS1 and ±5.5 mA on VS2.
- High Isolation Mode Rejection: 140 dB at 60 Hz.
- Compact Packaging: Available in 16-pin plastic DIP and 28-lead plastic surface-mount packages.
Applications
- Industrial Process Control: Suitable for transducer isolation, thermocouples, RTDs, pressure bridges, and flow meters.
- Ground Loop Elimination: Effective in eliminating ground loops in various industrial and medical applications.
- Motor and SCR Control: Used in motor and SCR control devices.
- Power Monitoring: Ideal for power monitoring applications.
- PC-Based Data Acquisition: Used in PC-based data acquisition systems.
- Test Equipment: Employed in various test equipment applications.
Q & A
- What is the isolation voltage rating of the ISO122PG4?
The ISO122PG4 is rated for 1500 Vrms continuous AC at 60Hz and 2400 Vrms for a 1-second test.
- What is the signal bandwidth of the ISO122PG4?
The signal bandwidth is 50 kHz.
- What is the maximum nonlinearity of the ISO122PG4?
The maximum nonlinearity is 0.020%.
- What is the operating temperature range of the ISO122PG4?
The operating temperature range is -25°C to 85°C.
- What are the typical supply voltages for the ISO122PG4?
The supply voltage range is ±4.5 V to ±18 V.
- What is the quiescent current of the ISO122PG4?
The quiescent currents are 5 mA on VS1 and ±5.5 mA on VS2.
- What is the isolation mode rejection ratio of the ISO122PG4?
The isolation mode rejection ratio is 140 dB at 60 Hz.
- In what packages is the ISO122PG4 available?
The ISO122PG4 is available in 16-pin plastic DIP and 28-lead plastic surface-mount packages.
- What are some common applications of the ISO122PG4?
Common applications include industrial process control, ground loop elimination, motor and SCR control, power monitoring, PC-based data acquisition, and test equipment.
- How does the ISO122PG4 protect against electromagnetic interference (EMI) and electrostatic discharge (ESD)?
The ISO122PG4 is engineered to address critical precautions like EMI and ESD, ensuring reliable performance in diverse settings.
