Overview
The ISO122P, produced by Texas Instruments, is a precision isolation amplifier that utilizes a novel duty cycle modulation-demodulation technique. This amplifier ensures high reliability and excellent high-frequency transient immunity by transmitting the signal digitally across a 2-pF differential capacitive barrier embedded in the plastic package. The ISO122P is designed for ease of use, requiring no external components for operation, and is suitable for a wide range of applications due to its robust specifications and features.
Key Specifications
| Specification | Value | Unit |
|---|---|---|
| Package Type | PDIP, SOIC | - |
| Pin Count | 8 (PDIP), 28 (SOIC) | - |
| Operating Temperature Range | -25 to 85 | °C |
| Power Supply Range | ±4.5 V to ±18 V | V |
| Quiescent Current | 5 mA (VS1), ±5.5 mA (VS2) | mA |
| Isolation Voltage Rated Continuous AC 60Hz | 1500 Vrms | Vrms |
| Isolation Mode Rejection | 140 dB at 60 Hz | dB |
| Maximum Nonlinearity | 0.020% | % |
| Signal Bandwidth | 50 kHz | kHz |
| VOS Drift | 200 V/°C | V/°C |
Key Features
- 100% Tested for High-Voltage Breakdown
- Rated 1500 Vrms isolation voltage
- High Isolation Mode Rejection (IMR): 140 dB at 60 Hz
- Bipolar Operation: VOUT = ±10 V
- Fixed Unity Gain Configuration for ease of use
- Maximum Nonlinearity: 0.020%
- Wide power supply range: ±4.5 V to ±18 V
- No external components required for operation
Applications
- Industrial Process Control: Transducer Isolator, Isolator for Thermocouples, RTDs, Pressure Bridges, and Flow Meters
- Ground Loop Elimination
- Motor and SCR Control
- Power Monitoring
- PC-Based Data Acquisition
- Test Equipment
Q & A
- What is the primary function of the ISO122P isolation amplifier?
The ISO122P is a precision isolation amplifier that transmits signals digitally across a high-voltage differential capacitive barrier, ensuring high reliability and excellent high-frequency transient immunity.
- What are the available package types for the ISO122P?
The ISO122P is available in 8-pin PDIP and 28-lead SOIC packages.
- What is the operating temperature range of the ISO122P?
The operating temperature range is -25°C to 85°C.
- What is the power supply range for the ISO122P?
The power supply range is ±4.5 V to ±18 V.
- What is the isolation voltage rating of the ISO122P?
The isolation voltage rating is 1500 Vrms continuous AC at 60 Hz.
- What is the maximum nonlinearity of the ISO122P?
The maximum nonlinearity is 0.020%.
- What is the signal bandwidth of the ISO122P?
The signal bandwidth is 50 kHz.
- Does the ISO122P require external components for operation?
No, the ISO122P does not require any external components for operation.
- What are some common applications of the ISO122P?
Common applications include industrial process control, ground loop elimination, motor and SCR control, power monitoring, PC-based data acquisition, and test equipment.
- How is the isolation achieved in the ISO122P?
The isolation is achieved through a 2-pF differential capacitive barrier embedded in the plastic package, using duty cycle modulation-demodulation technique.
