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Texas Instruments ISO7721 Dual-Channel Digital Isolator: 100 Mbps High-Speed Isolation, Available from Mingjiada Electronics

I. ISO7721 Product Overview

The ISO7721 is a high-performance dual-channel digital isolator launched by Texas Instruments, forming part of the ISO772x series. This device utilises dual-capacitor silicon dioxide (SiO₂) insulated-gate technology. Whilst isolating complementary metal-oxide-semiconductor (CMOS) or low-voltage CMOS digital I/O, it offers high electromagnetic immunity and low emissions, whilst also featuring low power consumption. The two channels of the ISO7721 operate in opposite directions (1 forward / 1 reverse), making it suitable for industrial and automotive electronics applications requiring bidirectional signal isolation.

II. ISO7721 Key Technical Specifications

Data rate: 100 Mbps

Isolation rating: Up to 5,000 V RMS (DW/DWV packages) / 3,000 V RMS (D package)

Surge immunity: Up to 12.8 kV

Common-mode transient immunity: ±100 kV/µs (typical)

Propagation delay: 11 ns (typical)

Supply Voltage Range: 2.25 V to 5.5 V

Operating Temperature Range: –55 °C to +125 °C

Package Options: SOIC-8 (D), SOIC-8 Wide Body (DWV), SOIC-16 Wide Body (DW)

Default Output: High (ISO772x) / Low (ISO772xF)

The ISO7721 has an expected service life of over 30 years at an operating voltage of 1.5 kV rms, with a typical current consumption of just 1.7 mA per channel at a data rate of 1 Mbps, combining the advantages of long service life and low power consumption. The device has also been certified to DIN EN IEC 60747-17 (VDE 0884-17), UL 1577, IEC 61010-1, IEC 62368-1, IEC 60601-1 and GB 4943.1, and provides ±8 kV IEC 61000-4-2 contact discharge protection.

Furthermore, Texas Instruments offers the ISO7721-Q1 automotive-grade version, which complies with the AEC-Q100 standard, has a device temperature grade of 1 (–40 °C to +125 °C), an HBM ESD classification of 3A and a CDM ESD classification of C6, making it suitable for automotive electronics applications.

III. Typical Application Areas

Thanks to its high data rates, enhanced isolation and excellent EMC performance, the ISO7721 is widely used in the following scenarios:

Industrial automation: PLC isolated communication, fieldbus interfaces, digital I/O isolation

Motor control: Isolation of gate drive signals to ensure electrical isolation between the power stage and the control stage

Power supply systems: Isolated power supply feedback, power management communication

Photovoltaic inverters: Signal isolation between the high-voltage side and the low-voltage side

Medical Equipment: Signal isolation compliant with the IEC 60601-1 safety standard

New Energy Vehicles: BMS (Battery Management System), on-board chargers, and OBC (On-Board Charger) isolated communication

When used in conjunction with an isolated power supply, the ISO7721 effectively prevents noise currents on data buses such as RS-485, RS-232 and CAN from damaging sensitive circuits.

IV. Mingjiada Electronics – Stock Availability

Shenzhen Mingjiada Electronics Co., Ltd. (hereinafter referred to as ‘Mingjiada Electronics’), established in 1996, is a globally renowned distributor of electronic components with nearly thirty years’ experience in the sector. The company specialises in the direct supply of electronic components from its own stock, covering core sectors such as automotive electronics, industrial control, AI and robotics, and communications, and distributes products from over 500 renowned manufacturers.

Mingjiada Electronics maintains a long-term stock of Texas Instruments’ ISO7721 series digital isolators, including models such as the ISO7721QDRQ1, ISO7721FDWR and ISO7721DWVR. These are genuine, original products available for immediate dispatch.

Supply Advantages

Genuine Products: All products are sourced through official channels from the original manufacturers, guaranteeing 100% genuine products

Stock Availability: We maintain regular stock in our Shenzhen and Hong Kong warehouses, supporting both small-batch samples and bulk purchases

Flexible Transactions: We support transactions in Chinese RMB (including VAT) within mainland China and in US dollars in Hong Kong

Quality Assurance: We provide the original manufacturer’s warranty and support inspection by third-party testing organisations

Contact Details

Contact: Mr Chen

Tel: +86 13410018555

Email: sales@hkmjd.com

Website: www.integrated-ic.com

Address: Units 1239–1241, New Asia Guoli Building, Zhenzhong Road, Futian District, Shenzhen

Tags: ISO7721DWVR, ISO7721DWV, ISO7721DW, ISO7721D, ISO7721

We welcome end customers, distributors and traders to contact us for the latest quotations and stock information regarding the ISO7721 series.