Texas Instruments ISO7820FDWR

Overview

ISO7820FDWR from Texas Instruments is a reinforced dual-channel digital isolator with 8000 V_PK isolation voltage, two forward-only CMOS/LVCMOS signal channels, ±100 kV/μs CMTI, 100 Mbps signaling rate, and operation across –55°C to 125°C - used in motor control gate drivers and isolated power supply feedback loops.

For engineers reviewing the ISO7820FDWR datasheet, ISO7820FDWR pinout, ISO7820FDWR application, or ISO7820FDWR equivalent, this page delivers verified package mapping (SOIC-16 DWW), channel directionality (forward-only), default output behavior ('low' on input power loss), safety certifications (VDE 0884-17, UL 1577), and real-world EMC performance metrics.

Technical Context

The ISO7820FDWR implements silicon dioxide (SiO₂) capacitive isolation with two unidirectional forward channels and no reverse path. Its differential input structure enables robust noise rejection, while internal level-shifting supports 2.25 V to 5.5 V operation on both sides independently.

It features enable-controlled high-impedance outputs (EN2 pin), thermal derating per VDE safety limiting curves, and integrated surge immunity (12.8 kV) compliant with IEC 61000-4-5. The DWW package provides >14.5 mm creepage/clearance for reinforced insulation in high-voltage systems.

Key Specifications

Pinout & Package

ISO7820FDWR uses the SOIC-16 extra-wide body (DWW) package (10.30 mm × 17.25 mm), providing >14.5 mm creepage and clearance for reinforced isolation in high-voltage applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADUM121N0BRZ-RL7 and SI8620ED-B-IS, ISO7820FDWR uniquely delivers 8000 V_PK reinforced isolation with EN2-controlled outputs and ±100 kV/μs CMTI - making it the only option qualified for 1200 V SiC inverter gate drive and IEC 60601-1 medical isolation.

Availability

ISO7820FDWR is available at Aetrix Electronics and suitable for motor control systems, solar inverters, industrial automation, medical diagnostics, and hybrid electric vehicle battery management requiring stable component supply and long-term lifecycle assurance.

Supply support for ISO7820FDWR 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 designing analog, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.

The ISO7820x family targets high-reliability isolation in safety-critical power conversion and control systems - emphasizing reinforced certification, high CMTI, and extended temperature operation.

FAQ

What is the default output state of ISO7820FDWR during input-side power loss?

The ISO7820FDWR defaults to 'low' on both OUTA and OUTB when input-side power (VCC1) is lost. This fail-safe behavior is intrinsic to the ISO7820F variant and ensures gate drivers or downstream logic enter a known safe state during brownout or controller reset - a critical feature for motor control and power supply protection circuits. Unlike the ISO7820 (which defaults high), ISO7820FDWR's low-default aligns with active-low disable requirements in many IGBT/SiC driver ICs.

Does ISO7820FDWR support bidirectional communication between isolated domains?

No, ISO7820FDWR provides two unidirectional forward channels only - INA→OUTA and INB→OUTB - with no reverse-path capability. The device lacks dedicated return-channel pins or internal feedback circuitry. For bidirectional isolation, TI recommends pairing ISO7820FDWR with a complementary isolator like ISO7820DWR (dual forward + dual reverse) or using a four-channel part such as ISO7840FDWR. This architecture simplifies timing analysis and enhances noise immunity in asymmetric control-to-power signal paths.

What safety certifications does ISO7820FDWR hold, and which standards do they cover?

ISO7820FDWR holds DIN EN IEC 60747-17 (VDE 0884-17), UL 1577, IEC 62368-1, IEC 60601-1, and GB 4943.1 certifications. These validate its reinforced insulation for 2× MOPP in medical devices, 1500 V_RMS working voltage in industrial equipment, and compliance with global safety standards for consumer, enterprise, and grid-connected systems. Certificate numbers include VDE 40040142, UL E181974, and CQC15001121716 - all publicly verifiable via respective agency databases.

How does the EN2 pin function on ISO7820FDWR, and what is its electrical behavior?

The EN2 pin on ISO7820FDWR controls the output state of OUTA and OUTB: when EN2 is high or left open, outputs operate normally; when EN2 is driven low, both outputs enter high-impedance mode. EN2 is referenced to VCC2 and has CMOS-compatible thresholds (VIH ≥ 0.7×VCC2, VIL ≤ 0.3×VCC2). This enables multi-controller arbitration on shared buses and dynamic power reduction - especially valuable in modular power converters where multiple controllers coordinate phase sequencing without hardware contention.

What is the maximum data rate supported by ISO7820FDWR, and how does supply voltage affect timing performance?

ISO7820FDWR supports up to 100 Mbps signaling rate across its full operating range (2.25 V to 5.5 V). Propagation delay increases slightly with lower supply: 10.7 ns typical at 5 V, 10.8 ns at 3.3 V, and 11.7 ns at 2.5 V. Pulse width distortion remains under 4.7 ns across all voltages, ensuring minimal duty cycle degradation in clock distribution. These values are measured with CL = 15 pF and reflect actual silicon performance - not theoretical limits - making ISO7820FDWR suitable for high-fidelity SPI, UART, and PWM isolation in real-world designs.