Overview
The ISO124U is a precision isolation amplifier produced by Texas Instruments. It incorporates a novel duty cycle modulation-demodulation technique, allowing the signal to be transmitted digitally across a 2-pF differential capacitive barrier. This design ensures excellent reliability and high-frequency transient immunity across the barrier. The device is easy to use, requiring no external components for operation, and is suitable for a wide range of applications due to its bipolar operation and wide supply voltage range.
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 | ||
| Output Voltage Range | ±10 | V | ||
| Nonlinearity | 0.010% | %FSR | ||
| Signal Bandwidth | 50 | kHz | ||
| Quiescent Current (VS1) | ±5 | mA | ||
| Quiescent Current (VS2) | ±5.5 | mA | ||
| Isolation Mode Rejection (60 Hz) | 140 | dB |
Key Features
- Novel duty cycle modulation-demodulation technique for digital signal transmission across the isolation barrier.
- High isolation mode rejection: 140 dB at 60 Hz.
- Maximum nonlinearity: 0.010%.
- Bipolar operation with output voltage range of ±10 V.
- Wide supply voltage range: ±4.5 V to ±18 V.
- Available in 16-pin PDIP and 28-lead SOIC packages.
- Fixed unity gain configuration for ease of use.
- 100% tested for high-voltage breakdown, rated at 1500 Vrms.
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 primary function of the ISO124U isolation amplifier?
The ISO124U is designed to transmit analog signals across a galvanic isolation barrier using a duty cycle modulation-demodulation technique. - What are the typical supply voltage ranges for the ISO124U?
The supply voltage range is ±4.5 V to ±18 V. - What is the maximum nonlinearity of the ISO124U?
The maximum nonlinearity is 0.010%. - What is the signal bandwidth of the ISO124U?
The signal bandwidth is 50 kHz. - What are the available package options for the ISO124U?
The ISO124U is available in 16-pin PDIP and 28-lead SOIC packages. - What is the isolation mode rejection of the ISO124U at 60 Hz?
The isolation mode rejection is 140 dB at 60 Hz. - How is the signal transmitted across the isolation barrier in the ISO124U?
The signal is transmitted digitally across a 2-pF differential capacitive barrier using duty cycle modulation. - What is the continuous isolation voltage rating of the ISO124U?
The continuous isolation voltage rating is 1500 Vrms. - What are some common applications of the ISO124U?
Common applications include industrial process control, ground loop elimination, motor and SCR control, power monitoring, PC-based data acquisition, and test equipment. - Does the ISO124U require any external components for operation?
No, the ISO124U does not require any external components for operation.
