Блог компании Supply TI Isolation Product:Digital Isolators,Opto-Emulators,Solid-State Relays,Isolated ADC

Supply TI Isolation Product:Digital Isolators,Opto-Emulators,Solid-State Relays,Isolated ADC

Shenzhen Mingjiada Electronics Co., Ltd., a globally renowned distributor of electronic components, specialises in providing a wide range of high-quality electronic components and assemblies. With years of industry experience, a stock of over 2 million SKUs, and an international supply chain network, the company offers a ‘one-stop’ procurement service for switching products to customers across multiple industries.

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I. TI Digital Isolators: The Core of High-Reliability, Low-Power Digital Signal Isolation

TI digital isolators are built on proprietary silicon dioxide (SiO₂) insulated gate technology. Their core function is to enable the electrically isolated transmission of digital signals, effectively separating high- and low-voltage domains, interference sources and sensitive circuits within a system to prevent interference and crosstalk, whilst ensuring the safety of personnel and equipment. They are the preferred choice for digital signal isolation in industrial and automotive applications.

Their core technical advantages are particularly notable: in terms of isolation performance, they support isolation ratings of up to 5.7 kVrms, meeting both basic and reinforced isolation requirements. They also feature excellent common-mode transient immunity (CMTI), effectively resisting high-frequency interference in industrial environments and automotive electronics to ensure signal transmission integrity; In terms of power consumption and efficiency, the current per channel is as low as 4.2 µA, with power consumption significantly lower than that of traditional isolation solutions. Furthermore, they support a wide operating voltage range of 1.71 V to 5.5 V, making them suitable for various power supply scenarios; regarding transmission performance, data rates can reach up to 150 Mbps, with some high-end models even achieving 200 Mbps. With low propagation delay and minimal pulse width distortion, they meet the demands of high-speed digital signal transmission.

TI’s digital isolator product portfolio is extensive, covering basic, enhanced and integrated power supply models. The integrated power supply models feature a 5kVrms isolation rating and up to 0.65W of output power, eliminating the need for an external isolation power supply and significantly simplifying the design process. Furthermore, the products offer a variety of channel configurations (1–6 channels) and packaging options (ranging from 2mm × 3mm QFN to high-creepage-distance packages). They are certified to multiple standards, including ATEX/IECEx and AEC-Q100, making them suitable for a wide range of demanding applications such as industrial plants, hybrid electric vehicles (HEV/EV), and NewSpace. They can be used for digital signal isolation transmission in devices such as PLCs, motor drivers, and in-vehicle control systems.

II. TI Optocoupler Simulator: A High-Performance Upgrade and Alternative to Traditional Optocouplers

The TI optocoupler simulator is an isolation device optimised to address the pain points of traditional optocouplers. Utilising a diode emulator input and digital output architecture, it enables direct pin-to-pin replacement of industry-standard high-speed digital optocouplers without the need for PCB redesign. It is compatible with traditional optocoupler applications whilst significantly enhancing system performance and reliability.

Compared to traditional optocouplers, the advantages of the TI Optocoupler Simulator are particularly evident: Firstly, it offers higher reliability. As it does not rely on optoelectronic components, there is no ageing effect, resulting in a longer service life. Furthermore, through strict process control, device-to-device variation is minimised, ensuring greater stability; Second, superior performance: data rates of up to 25 Mbps, a maximum propagation delay of just 52 ns, and extremely low levels of pulse width distortion and propagation delay skew. Additionally, with a minimum transient immunity of ±125 kV/µs, their interference resistance far exceeds that of traditional optocouplers; Third, lower power consumption: the simulated diode input stage requires no compensation for ageing effects, resulting in significantly lower power consumption than comparable optocoupler products; Fourthly, they offer greater environmental adaptability, with an operating temperature range spanning -40°C to 125°C and support for a wide supply voltage range of 2.7V to 5.5V, making them suitable for harsh industrial environments.

Taking the TI ISOM871x series optocoupler simulators as an example, this series comprises two models: the ISOM8710 (CMOS-compatible output) and the ISOM8711 (open-collector output). They are housed in a compact SOIC-5 package, with an isolation rating of up to 3750 V rms and a surge withstand capability of up to 10 kV. They have obtained multiple safety certifications, including UL 1577, VDE, and IEC 62368-1. Typical applications include motor drivers, I/O modules for industrial controllers, and factory automation equipment; they can directly replace traditional optocouplers to achieve a seamless upgrade in system performance.

III. TI Solid-State Relays (SSR): Highly Reliable Switching Solutions with Integrated Isolation

TI solid-state relays utilise advanced capacitive and magnetic isolation technologies to integrate power and signal isolation functions, making them an ideal choice for replacing electromechanical and optocoupler relays. Their core function is to enable isolated control of high- and low-voltage circuits, converting low-power inputs into high-current gate drives, and they are widely used in switching control applications within high-voltage systems.

The core advantages of TI solid-state relays lie in three areas: integration, reliability and safety. High integration: by integrating the isolation barrier, power transmission and signal control onto a single chip, there is no need for an external isolation power supply, which significantly reduces system size and design costs whilst simplifying the design process; High reliability: By eliminating the moving parts found in traditional electromechanical relays, these devices avoid issues such as mechanical wear and contact bounce, resulting in a longer service life. Furthermore, integrated features such as avalanche current protection, dual isolated comparators and self-generated secondary bias power supply further enhance system reliability; Excellent isolation performance, supporting up to 3.75 kVrms basic isolation and 5 kVrms reinforced isolation, meeting safety isolation requirements for various applications whilst complying with creepage distance and clearance requirements.

The product range covers three main categories: isolated switch drivers (for controlling external power switches such as MOSFETs, IGBTs and SiC devices), isolated switches (integrating high-voltage MOSFETs, supporting up to 1.2 kV and 50 mA output), and high-voltage switches with resistive voltage dividers (integrating high-precision resistive voltage dividers, suitable for 400 V and 800 V battery management systems). Typical applications include HEV/EV battery management systems, on-board chargers (OBCs), DC/DC converters, traction inverters, factory automation control and electric vehicle charging infrastructure. Among these, automotive-grade models (such as the TPSI2140-Q1) feature a 1200V withstand voltage and a 2mA avalanche rating, meeting the stringent requirements of high-voltage automotive applications.

IV. TI Isolated ADCs: A Powerful Tool for Precision Signal Acquisition in High-Voltage Systems

TI isolated ADCs (also known as isolated modulators) are precision signal acquisition devices specifically designed for high-voltage systems. Their core function is to isolate and convert analogue signals (such as current and voltage) from the high-voltage domain into digital signals, whilst integrating signal acquisition with electrical isolation. This resolves interference and safety issues associated with signal acquisition in high-voltage environments, making them widely used in high-precision acquisition scenarios such as current detection and voltage monitoring.

TI isolated ADCs offer high precision, high reliability and compact size as their core advantages: in terms of precision, they employ a precision Δ-Σ modulator architecture, with an effective number of bits (ENOB) of up to 12–14 bits and an uncalibrated accuracy better than 0.3%. Certain models support device-to-device synchronisation, enabling system accuracy as high as 0.1, whilst an integrated temperature sensor facilitates temperature compensation, further enhancing acquisition accuracy; In terms of isolation performance, the range covers both basic and enhanced isolation, capable of withstanding high common-mode voltages to meet the isolation requirements of high-voltage systems; regarding size, certain models utilise a 3.5mm × 2.7mm leadless package, reducing the required PCB space by 50% compared to similar enhanced isolation solutions, thereby meeting the demands of miniaturised designs.

The product range is extensive, including the AMC0106 series, AMC0206 series and ADC12QJ1600-SEP, amongst others. The AMC0106 series offers multiple input voltage ranges of ±50 mV, ±250 mV and ±1 V to suit various signal acquisition requirements; The ADC12QJ1600-SEP is a radiation-hardened variant with a total ionising dose (TID) of up to 30 kRad and a single-event latch (SEL) immunity of 43 MeV·cm²/mg, making it suitable for aerospace and defence applications; The AMC1304M25 enables load current measurement from -10A to +10A, making it suitable for applications such as industrial motor drivers and photovoltaic inverters. Furthermore, TI provides accompanying reference designs (such as the isolated current sensing reference design based on the AMC1304M25) to help engineers rapidly complete solution development.