Overview
The ISO124U/1K is a precision isolation amplifier designed and manufactured by Texas Instruments. This device incorporates a novel duty cycle modulation-demodulation technique, allowing for the transmission of signals digitally across a 2-pF differential capacitive barrier. This technique ensures excellent reliability and high-frequency transient immunity across the barrier. The ISO124U/1K is available in an 8-pin SOIC (DVA) package and operates within a temperature range of -25°C to 85°C. It is designed for ease of use, requiring no external components for operation, and features a fixed unity gain configuration.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Supply Voltage | ±4.5 V | ±18 V | V | |
| Analog Input Voltage (VIN) | ±100 V | V | ||
| Continuous Isolation Voltage | 1500 Vrms | Vrms | ||
| Junction Temperature | 125 °C | °C | ||
| Operating Temperature Range | -25 °C | 85 °C | °C | |
| Isolation Mode Rejection (60 Hz) | 140 dB | dB | ||
| Gain Error | ±0.05 % | ±0.50 % | %FSR | |
| Nonlinearity | ±0.010 % | %FSR | ||
| Signal Bandwidth | 50 kHz | kHz | ||
| Output Voltage Drift (VOS) | 200 µV/°C | µV/°C |
Key Features
- 100% Tested for High-Voltage Breakdown with a rated voltage of 1500 Vrms and 2400 Vrms for partial discharge testing.
- High Isolation Mode Rejection (IMR) of 140 dB at 60 Hz.
- Maximum Nonlinearity of ±0.010% and Gain Error of ±0.05% to ±0.50% FSR.
- Bipolar Operation with input and output ranges of ±10 V.
- Supply Range of ±4.5 V to ±18 V and quiescent currents of ±5 mA on VS1 and ±5.5 mA on VS2.
- Ease of Use with a fixed unity gain configuration and no external components required for operation).
- Available in 16-pin PDIP and 28-lead SOIC plastic surface-mount packages).
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 ISO124U/1K isolation amplifier used for?
The ISO124U/1K is used for precision signal isolation in various applications such as industrial process control, ground loop elimination, motor and SCR control, power monitoring, and PC-based data acquisition).
- What is the operating temperature range of the ISO124U/1K?
The operating temperature range is -25°C to 85°C).
- What is the supply voltage range for the ISO124U/1K?
The supply voltage range is ±4.5 V to ±18 V).
- What is the isolation mode rejection (IMR) of the ISO124U/1K?
The IMR is 140 dB at 60 Hz).
- What is the maximum nonlinearity of the ISO124U/1K?
The maximum nonlinearity is ±0.010%).
- What packages are available for the ISO124U/1K?
The ISO124U/1K is available in 16-pin PDIP and 28-lead SOIC plastic surface-mount packages).
- Does the ISO124U/1K require external components for operation?
No, the ISO124U/1K does not require external components for operation and features a fixed unity gain configuration).
- What is the signal bandwidth of the ISO124U/1K?
The signal bandwidth is 50 kHz).
- How is the signal transmitted across the isolation barrier in the ISO124U/1K?
The signal is transmitted digitally across a 2-pF differential capacitive barrier using a duty cycle modulation-demodulation technique).
- What high-voltage testing criteria does the ISO124U/1K meet?
The ISO124U/1K meets the German VDE0884 Optocoupler Standards for partial discharge testing, ensuring transient overvoltage protection without damage).
