Texas Instruments ISO7720QDWRQ1

Overview

ISO7720QDWRQ1 from Texas Instruments is a reinforced dual-channel digital isolator for automotive systems, delivering 100 Mbps data rate, ±100 kV/μs CMTI, and 5000 VRMS isolation rating in a 16-pin wide-SOIC (DW) package. It features dual unidirectional channels (A→A, B→B), 2.25–5.5 V dual-supply operation, and AEC-Q100 Grade 1 qualification (–40°C to +125°C ambient).

For engineers reviewing the ISO7720QDWRQ1 datasheet, ISO7720QDWRQ1 pinout, ISO7720QDWRQ1 application, or ISO7720QDWRQ1 equivalent, this device serves as a high-reliability isolation solution for battery management, traction inverters, and on-board chargers where robust EMC, functional safety support, and long-term barrier lifetime (>30 years at 1.5 kVRMS) are critical.

Technical Context

The ISO7720QDWRQ1 implements dual capacitive SiO₂ isolation barriers with reinforced insulation per DIN EN IEC 60747-17 (VDE 0884-17), supporting independent 2.25–5.5 V input/output supplies (VCCI/VCCO) and level translation. Its architecture enables simultaneous channel operation with identical directionality (IN→OUT on both sides), default-high output behavior, and integrated UVLO with 100–200 mV hysteresis.

Designed for system-level immunity, it achieves ±8 kV IEC 61000-4-2 contact discharge across the barrier, 12.8 kV surge capability (oil test), and low emissions compliant with CISPR 32 Class B. Thermal design is supported by RθJA = 86.5°C/W (DW package) and safety limiting values validated per UL 1577 and IEC 62368-1.

Key Specifications

Pinout & Package

ISO7720QDWRQ1 is housed in a 16-pin wide-body SOIC (DW) package (10.30 mm × 7.50 mm), optimized for creepage/clearance compliance in high-voltage automotive PCB layouts. The isolation barrier separates input-side (VCCI, GNDI, INA, INB) and output-side (VCCO, GNDO, OUTA, OUTB) terminals, with 10 NC pins providing layout flexibility and noise margin.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel digital isolator applications.

Compared with Si8620ED-B-IS and ADUM1200ARZ-RL7, ISO7720QDWRQ1 delivers 2× higher isolation rating, 4× higher CMTI, and full automotive qualification - making it the sole option for ASIL-B–compliant EV powertrain subsystems requiring long-life barrier integrity and system-level EMC compliance.

Availability

ISO7720QDWRQ1 is available at Aetrix Electronics and suitable for battery management systems, traction inverters, and on-board chargers requiring stable component supply across multi-year automotive production programs.

Supply support for ISO7720QDWRQ1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and automotive-grade ICs, with decades of experience in high-reliability isolation technology.

The ISO772x-Q1 product line was engineered specifically for electric vehicle powertrain systems, emphasizing reinforced insulation, functional safety readiness, and extreme EMC resilience in harsh automotive environments.

FAQ

What is the isolation rating and certification status of ISO7720QDWRQ1?

ISO7720QDWRQ1 is rated for 5000 VRMS isolation per UL 1577 and certified for reinforced insulation per DIN EN IEC 60747-17 (VDE 0884-17), IEC 62368-1, IEC 60601-1, and GB 4943.1. It carries VDE certificate 40040142, UL file E181974, and CQC certificates for DW-16 packaging, enabling use in ASIL-B–compliant automotive systems.

Does ISO7720QDWRQ1 support different supply voltages on input and output sides?

Yes, ISO7720QDWRQ1 supports independent 2.25 V to 5.5 V supplies on VCCI (input side) and VCCO (output side), enabling seamless level translation between 3.3 V microcontrollers and 5 V analog domains. This dual-supply capability is confirmed in Section 6.3 of the datasheet and verified in electrical characteristics tables for 2.5 V, 3.3 V, and 5 V operating points.

What is the default output state of ISO7720QDWRQ1 during power-up or signal loss?

ISO7720QDWRQ1 has a default-high output configuration: both OUTA and OUTB drive high when input power is absent, input signals are floating, or VCCI drops below UVLO threshold. This behavior is explicitly defined in the device description and functional modes section, distinguishing it from F-suffix variants which default low.

How does ISO7720QDWRQ1 achieve its high CMTI performance of ±100 kV/μs?

ISO7720QDWRQ1 achieves ±100 kV/μs typical common-mode transient immunity through proprietary double-capacitive SiO₂ isolation barriers, symmetric layout design, and internal noise rejection circuitry. This value is measured per Figure 7-3 in the datasheet with VCM = 1200 V and is validated across temperature and supply voltage ranges.

Is ISO7720QDWRQ1 pin-compatible with other devices in the ISO772x-Q1 family?

ISO7720QDWRQ1 shares identical pinout with ISO7721QDWRQ1 in the DW-16 package (Figure 5-1 and 5-2), differing only in channel directionality (both unidirectional vs. opposite-direction). No PCB changes are required when substituting within the same package variant, though firmware logic must account for signal flow direction.