Texas Instruments ISO772x/ISO772x-Q1 Digital Isolators

Texas Instruments ISO772x/ISO772x-Q1 Digital Isolators are high-performance, dual-channel digital isolators with 5000V_RMS (DW package) and 3000V_RMS (D package) isolation ratings per UL 1577. These devices are also certified by VDE, TUV, CSA, and CQC. The ISO772x/ISO772x-Q1 isolators provide high electromagnetic immunity and low emissions at low power consumption while isolating CMOS or LVCMOS digital I/Os. Each isolation channel has a logic input and output buffer separated by a silicon dioxide (SiO₂) insulation barrier. The ISO772x-Q1 devices are AEC-Q100 qualified for automotive applications. These isolators are used in DC-DC converters, on-board chargers, and Battery Management Systems (BMS).

The ISO7720/ISO7220-Q1 devices have both channels in the same direction, while the ISO7721/ISO7221-Q1 devices have both channels in the opposite direction. In the event of input power or signal loss, the default output is high for a device without suffix F and low for a device with suffix F.

The device helps prevent noise currents on a data bus or other circuits from entering the local ground and interfering with or damaging sensitive circuitry when used with isolated power supplies. The electromagnetic compatibility of the ISO772x/ISO772x-Q1 devices has been significantly enhanced to ease system-level ESD, EFT, surge, and emissions compliance through innovative chip design and layout techniques.

Features

2.25V to 5.5V wide supply range
2.25V to 5.5V level translation
Default output high and low options
–55°C to 125°C wide temperature range
Low power consumption, typical 1.7mA at 1Mbps
Low propagation delay, 11ns typical
High CMTI, ±100kV/µs typical
Robust Electromagnetic Compatibility (EMC):
- System-level ESD, EFT, and surge immunity
- Low emissions
Wide-SOIC (DW-16) and narrow-SOIC (D-8) package options

Safety and regulatory approvals:
- VDE reinforced insulation per DIN EN IEC 60747-17 (VDE 0884-17)
- UL 1577 component recognition program
- IEC 62368-1, IEC 61010-1, IEC 60601-1 and
- GB 4943.1 certifications