MAX13433EESD+

The MAX13433EESD+ is a small, wide-range 3.3 V power-supply-independent, differential line driver with robust ±33-kV ESD protection for both differential outputs and enable pins. The device provides digital and power isolation of the system or chip from its environment and can be used to protect and extend system interfaces from damage due to transients. Key features of the MAX13433EESD+ include low power consumption, a 2.5 V to 5.5 V single-supply operation, and a robust ±33-kV ESD protection.

Application Field

The MAX13433EESD+ device provides an interface between a differential low-voltage signal source and an isolated system. It is designed to drive two differential lines, one of which must be terminated with a resistor of 50 Ω to 200 Ω in order to improve the system’s signal integrity. It can also be used to transform the input signal into a narrow channel signal which can be read by an isolated system. The device is suitable for applications such as industrial automation systems, powertrain control systems, medical and industrial equipment, and aerospace systems.

Working Principle

The MAX13433EESD+ uses an on-board oscillator, regulated voltage converter and level shifters to form an interface bridge between the low voltage differential signal source and an isolated system. The device provides digital isolation along with ±33-kV ESD protection for both differential outputs and enable pins. The ESD protection consists of four series diodes that are configured in an active crowbar topology for differential outputs, and two clamp diodes for enable pins. The device also provides independent control and logic enable inputs, a logic output enable signal, and an error signal that indicates improper termination or degradation of the signal insertion loss. The signal is applied to the input pins, which are then amplified and converted to a differential signal by the MAX13433EESD+ driver, which is then transmitted via the two differential outputs to the isolated system.

The device uses low-voltage differential signaling (LVDS) technology with signal levels of 350 mV peak-to-peak to maximize signal integrity and minimize signal interference. The device is powered by a supply voltage of 2.5 V to 5.5 V and has very low power consumption, making it an ideal choice for applications involved in low-power or space-constrained systems. The device also includes an output voltage sense pin that provides an adjustable threshold voltage and can be used for complete monitoring and protection of system transceivers.

Overall, the MAX13433EESD+ is a small, robust and power-efficient device suitable for a wide range of applications. The device is ideal for industrial automation systems, powertrain control systems, medical and industrial equipment and aerospace systems that require a robust and isolated interface.