ZR40402F41TA Integrated Circuits (ICs)

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Voltage references, sometimes known as reference voltage sources, generate a constant output voltage relative to a common ground or supply voltage. They are used to provide a reference voltage inside electronic circuits, hence the name, or to monitor a voltage level externally. The ZR40402F41TA is a voltage reference module designed for MIL-STD-1553 applications and belonging to the ZR404xx series from ZORAN Corporation. It is an ideal aerospace component for incorporating precision voltage reference and buffered reference output capability.

Product Overview and Features

The ZR40402F41TA consists of two sections – the reference control module and the buffered output stage. The reference control module is based on the classic Series Regulated Zener Voltage Reference topology, and the buffered output module provides a low-impedance, buffered voltage reference output typically limited to ±2.5% accuracy. For applications operating in the temperature range of -55°C to +150°C, the ZR40402F41TA provides a stable reference voltage with a current burden of typically less than 1 μA. This component also includes a range of protection features such as current limit, thermal- and overvoltage protection, and is adapted for COTS applications with the inclusion of an LDO for buffered output stage.

The ZR40402F41TA is designed with a low dropout voltage which helps to reduce the power consumption of the regulator and has a high peak accuracy of between 2.2% and 2.4%. Its wide operating temperature range of -40°C to +150°C also makes it suitable for a variety of aerospace applications. The ZR40402F41TA also features output discharge functionality which helps to protect the device from accidental failures in case the power is suddenly interrupted. Its advanced packaging technology guarantees high quality and low-noise performance, while its 8-bump WLCSP (Wafer Level Chip Scale Packaging) design helps to reduce the component footprint and cost.

Application Field

The ZR40402F41TA voltage references are well-suited for a range of aerospace, military and automotive applications. In particular, they are suitable for use in MIL-STD-1553 applications and as a reference voltage source for DC-DC converters, voltage regulators and other systems. Additionally, their small form factor makes them suitable for space-constrained applications such as aircraft, missiles, satellites and UAVs. The ZR40402F41TA is also well-suited for use in various high-reliability avionics, control systems and instrumentation systems.

Working Principle

Voltage references generate a constant output voltage relative to a common ground or supply voltage. They typically employ a topology that uses a voltage reference diode, often a Zener diode, combined with a series regulator that controls the reference voltage output. The ZR40402F41TA voltage reference module uses a series-regulated Zener voltage reference topology, which consists of an NPN transistor acting as an active Zener diode and an error amplifier. It is designed to operate from a 5V supply, with a single external resistor to set the required reference voltage. The reference voltage output is generated from a combination of the Zener voltage and an external resistor which sets the voltage reference value. The output voltage is then buffered by an automatic gain control amplifier, and is then further regulated by an LDO for the buffered output stage.

Conclusion

The ZR40402F41TA voltage reference is well-suited for a range of aerospace, military and automotive applications and is an ideal aerospace component for incorporating precision voltage reference and buffered reference output capability. It uses the classic Series Regulated Zener Voltage Reference topology to generate a constant output voltage relative to a common ground or supply voltage and includes a range of protection features such as current limit, thermal- and overvoltage protection. Its advanced packaging technology guarantees high quality and low-noise performance and its wide operating temperature range makes it suitable for a variety of aerospace applications. The ZR40402F41TA is an excellent choice for applications that require high performance, stability and reliability with a small form factor.

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