Texas Instruments ISO120 Precision Low Cost Isolation Amplifier ISO120G

The ISO120G is a precision isolation amplifier designed by Texas Instruments, featuring a unique duty cycle modulation-demodulation technique that allows for digital signal transmission across a 2pF differential capacitive barrier. This design ensures high reliability and excellent transient immunity, making it suitable for various applications. The amplifier operates within a power supply range of -4.5V to -18V and exhibits low quiescent current, which enhances its efficiency in diverse environments. The ISO120G is characterized by a maximum nonlinearity of 0.01% and an offset voltage drift of 150¬µV/¬8C, ensuring high precision in measurements. It supports a bandwidth of 60kHz without requiring external components, and with the addition of two capacitors, it can achieve precision specifications at a reduced bandwidth of 6kHz. The device is rated for continuous isolation voltage of 1500Vrms, making it suitable for applications that require ground loop elimination, industrial process control, and biomedical measurements. The amplifier is housed in a 24-pin hermetic DIP package and operates effectively across a wide temperature range of -25¬8C to 85¬8C. Its features include high input mode rejection (115dB at 60Hz) and user control of carrier frequency, which adds flexibility for various engineering applications.