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Function Introduction
GLaC87AC is a high-precision isolation amplifier, which can be used for voltage detection of motor driver, transformer and UPS. The chip contains two electrically isolated parts, the input side and the output side, which transmit data through the internal isolator. The chip has an input voltage amplitude of 2V and an input impedance of 1G Ω. In typical applications, the voltage divider is used to scale the required measured voltage to meet the input voltage range of the chip, and the output is in differential form.
The mature isolation technology/sigma delta modulation technology/chopper amplification and differential output circuit integrated in the GLaC87AC can provide excellent isolation noise suppression/low offset/high gain accuracy and high stability.
Product characteristics
• High dielectric withstand voltage: 2500V, one minute;
• Advanced sigma delta modulation technology
• Unit gain 1V/V, ± 1% gain accuracy
• Working voltage at input end: 4.5V ～ 5.5V;
• 1G Ω input resistance
• 0 to 2V rated input range
• - 35ppm/℃ low gain drift
• 21uV/℃ low offset voltage drift
• Maximum 0.1% nonlinearity
• High level effective shutoff signal
• 100KHz working bandwidth
• Working voltage at output end: 3V ～ 5.5V;
• High common-mode transient immunity: ≥ 25kV/µ s;
• Wide working temperature range: - 55 ℃~125 ℃;
• Packaging form: ceramic CSOP08;
Product use
• Measurement of isolation voltage in AC and servo motor drives
• Isolated DC bus voltage detection in solar inverter and wind turbine inverter
• Isolated sensor interface
• Data acquisition system signal isolator
• Universal voltage isolation
Function block diagram