会社ブログについて Supply ST Rad-Hard Analog IC:Operational Amplifier,Comparator,Data Converter,Voltage Reference

Supply ST Rad-Hard Analog IC:Operational Amplifier,Comparator,Data Converter,Voltage Reference

Shenzhen Mingjiada Electronics Co., Ltd. is a renowned distributor of electronic components. Adhering to the principle of ‘serving and benefiting our customers’, we provide a comprehensive range of high-quality electronic components.

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I. Radiation-Hardened Operational Amplifiers: High-Precision, Radiation-Tolerant Signal Conditioning Cores

Operational amplifiers are fundamental core components of analogue systems, primarily performing functions such as amplification of weak signals, impedance matching, filtering, integration and differentiation, and error compensation. ST’s radiation-hardened operational amplifiers are specifically designed for space radiation environments. They address the key challenges faced by standard operational amplifiers in irradiated environments—such as gain attenuation, input offset voltage drift, deterioration of the noise figure and output distortion—whilst balancing high precision, low power consumption and strong radiation resistance, making them suitable for aerospace-grade weak analogue signal conditioning applications.

In terms of core technical characteristics, ST’s radiation-hardened operational amplifiers utilise proprietary radiation-hardened BiCMOS and bipolar processes. Through optimised device structures and radiation-hardened layout design, they effectively suppress the effects of total dose irradiation, single-event upsets and single-event transients. The entire product range supports operation across a wide temperature range (-55°C to 125°C), with extremely low parameter drift throughout the temperature range and following irradiation, ensuring signal conditioning accuracy under extreme temperature and radiation conditions. The devices also integrate over-temperature protection, over-current limiting and ESD protection circuits, and offer outstanding resistance to electromagnetic interference. Certain high-end models feature rail-to-rail input and output, high output current and high slew rate characteristics, catering to diverse signal processing requirements.

Leading products in the range include several aerospace-qualified devices. Among these, the radiation-hardened general-purpose operational amplifiers offer a balance of cost-effectiveness and reliability, suitable for routine conditioning of satellite attitude sensor signals and power supply monitoring signals; high-precision, low-drift models specialise in amplifying weak sensor signals, with post-irradiation offset voltage drift controlled within an extremely narrow range; whilst high-voltage, high-current devices enable high-power analogue driving and signal conditioning, meeting the requirements of aerospace power supply systems and actuator control. All products are supplied with comprehensive irradiation test reports, as well as macro-models for end-of-life and end-of-radiation, supporting reliability simulation and verification of customer systems and fully complying with aerospace project R&D specifications.

Typical application scenarios include signal conditioning for satellite payloads, sensor modules for deep-space probes, aerospace power control systems and nuclear industry monitoring equipment; these devices serve as core components for high-reliability analogue front-end systems.

II. Radiation-Hardened Voltage Comparators: High-Speed, High-Reliability Threshold Detection Devices

Voltage comparators are primarily used for analogue voltage threshold detection. They compare acquired analogue signals with a reference voltage and output a digital level signal to perform functions such as threshold detection, overvoltage and undervoltage protection, signal shaping and pulse detection; they serve as key interface devices for converting analogue signals to digital logic. ST’s radiation-hardened comparators are designed to meet the requirements of high-speed discrimination, high immunity to interference and protection against single-event upsets in space applications. They are characterised by fast response times, strong radiation tolerance and high output stability.

In terms of core technical advantages, ST’s radiation-hardened comparators utilise a high-speed complementary BiCMOS process to achieve an excellent balance between speed and power consumption, significantly enhancing signal detection response times. They also offer superior power supply noise suppression capabilities, enabling precise voltage threshold identification even in complex electromagnetic radiation environments. Through targeted radiation-hardened design, the devices can withstand heavy-ion radiation in space, effectively mitigating false inversions and misjudgements caused by single-particle transient interference; their total dose irradiation tolerance is suited to mainstream aerospace mission conditions. The product range includes various architectures, such as single-channel and four-channel configurations, supporting wide-voltage single or dual power supplies and a wide input common-mode voltage range, covering the vast majority of aerospace analogue voltage monitoring scenarios.

The flagship product, the RHR801 radiation-hardened ultra-high-speed comparator, is a key representative of this product category. Utilising a hermetically sealed Flat-8 package, it features ultra-high-speed rising and falling edge response and high radiation resistance. Designed specifically for high-precision, high-speed threshold discrimination applications, it is widely used in satellite high-speed signal detection and aerospace pulse control systems. Furthermore, the LM2901 series of aerospace-grade, hardened four-channel comparators integrates four independent high-precision comparison units. Supporting a wide supply voltage range of 2 V to 32 V with flexible single or dual-supply configuration, these devices offer high integration and low power consumption, making them suitable for applications such as multi-channel voltage monitoring, power supply fault protection and sensor out-of-limit alarms. Certain multifunctional integrated devices, such as the TSM1002DS, integrate dual comparators and a voltage reference, enabling threshold detection and reference voltage regulation on a single chip, thereby significantly simplifying peripheral circuitry and reducing board space.

These devices are primarily used in applications such as overvoltage and undervoltage protection for aerospace power supplies, signal detection for satellite attitude control, fault monitoring of equipment in radiation environments, and high-speed pulse signal shaping.

III. Radiation-Hardened Data Converters: High-Precision, Radiation-Tolerant Analogue-to-Digital and Digital-to-Analogue Conversion Units

Data converters comprise analogue-to-digital converters (ADCs) and digital-to-analogue converters (DACs), serving as a bridge between the analogue world and digital control systems. ADCs enable the digital acquisition of analogue signals, whilst DACs convert digital commands into analogue outputs. ST’s radiation-hardened data converters are optimised to address issues such as reduced sampling accuracy, increased conversion errors and data glitches in space radiation environments. They combine high-speed conversion, low distortion, high stability and strong radiation resistance, making them suitable for aerospace-grade high-precision data acquisition and closed-loop control applications.

In terms of technical characteristics, ST’s radiation-hardened ADCs and DACs utilise a ruggedised CMOS process and undergo rigorous radiation screening and parameter calibration. They maintain stable conversion accuracy, resolution and linearity even after exposure to a total radiation dose, effectively suppressing radiation-induced sampling offset and harmonic distortion. The product range covers a variety of resolutions and sampling rates, including low-power, low-speed, high-precision models and high-speed, medium-to-high-resolution models, catering to different power consumption and speed requirements. Some devices integrate internal voltage references and sample-and-hold circuits, eliminating the need for complex external matching circuits, thereby enhancing system integration and immunity to interference, whilst supporting stable operation across a wide temperature range with controllable conversion error under all operating conditions.

The product portfolio caters to both general-purpose and high-end applications. The 12-bit high-precision radiation-hardened ADCs, with their low power consumption and high linearity, are widely used in satellite environmental sensing, attitude sensors and power supply parameter acquisition; high-speed ADCs are suited to the acquisition of high-frequency signals and radar detection signals in aerospace applications; whilst radiation-hardened DACs are specialised for applications such as aerospace actuator regulation, precision power supply calibration and analogue outputs for attitude control. All devices have passed aerospace-grade reliability certification and are accompanied by comprehensive radiation test data and simulation models, meeting the stringent reliability assessment requirements of aerospace programmes.

Core application scenarios include satellite payload data acquisition, signal conversion for deep-space exploration equipment, precision servo control systems for aerospace, and nuclear radiation monitoring data acquisition systems.

IV. Radiation-Hardened Voltage References: Highly Stable, Radiation-Resistant Reference Sources

Voltage references serve as the ‘yardstick of accuracy’ for analogue systems, providing precise and stable reference voltages for operational amplifiers, comparators, data converters and voltage regulator circuits; their accuracy and stability directly determine the measurement and control accuracy of the entire analogue system. Conventional voltage references are prone to reference voltage drift, increased temperature drift and reduced stability when exposed to radiation or extreme temperatures, leading to a failure in the overall system accuracy. ST’s radiation-hardened voltage references are high-precision, regulated reference devices specifically designed for extreme radiation conditions, serving as the cornerstone of highly reliable analogue systems.

This product range offers outstanding core technological advantages. The devices undergo specialised radiation-hardened design, enabling them to withstand a total radiation dose of up to 300 krad. Following irradiation, the drift in the reference voltage is minimal, ensuring exceptional radiation stability. The temperature coefficient of drift is extremely low across the entire temperature range; the devices maintain precise reference voltage output even under conditions of rapid switching between high and low temperatures, whilst offering extremely low initial error, high output accuracy and long-term stability. The products have passed the highest level of aerospace certification (QML-V) and demonstrate exceptional robustness in heavy-ion radiation environments, enabling long-term stable operation in extreme scenarios such as deep space, satellite-borne applications and the nuclear industry.

ST’s radiation-hardened voltage reference products cover a wide range of standard output voltage specifications, catering to the reference power supply requirements of various analogue chips. They support fixed voltage output and require no external calibration circuits, offering ease of use and high reliability. Comprehensive irradiation test reports, lifetime assessment data and device macro-models are also provided, enabling direct use in aerospace project system design and reliability simulation, thereby significantly reducing customers’ R&D and validation costs. Some integrated devices combine the voltage reference with comparators and operational amplifiers, achieving multifunctional integration and further optimising board-level design.

As the core of precision in analogue systems, these devices are applied across all high-reliability analogue circuits in the aerospace sector. They primarily provide stable references for modules such as ADC/DAC conversion, precision operational amplifier signal conditioning, voltage threshold comparison and aerospace power supply voltage regulation calibration, and are key components in ensuring the long-term, high-precision operation of satellites, probes and nuclear industry equipment.

V. Overall Advantages and Industry Value of ST’s Radiation-Hardened Analogue ICs

Compared with standard commercial analogue ICs and competing radiation-hardened devices, ST’s four major categories of radiation-hardened analogue ICs offer significant comprehensive advantages: Firstly, comprehensive product portfolio coverage, providing a full range of devices for the entire signal chain—including signal conditioning, threshold detection, data conversion and reference voltage regulation—to support complete analogue front-end system designs; secondly, exceptional radiation reliability, with the entire range featuring aerospace-grade hardened designs that have passed high-level certifications such as QML-V, and are resistant to various space radiation effects including total dose and single-event upsets; thirdly, high-precision stability under all operating conditions, with minimal parameter drift following irradiation, extreme temperature exposure and long-term ageing, ensuring system accuracy throughout the entire life cycle; fourthly, comprehensive support, including complete test reports, simulation models and technical solutions, to meet the stringent R&D and evaluation standards of aerospace projects.

Currently, ST’s radiation-hardened analogue ICs are widely deployed in high-end applications such as various satellite platforms, deep-space exploration missions, space launch vehicles and nuclear industry measurement and control systems. They have become the preferred core components for high-reliability analogue systems operating under extreme conditions, providing robust technical support for the long-term, stable and high-precision operation of space electronic equipment.