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ISO7721FDR

TIISO7721FDR

Texas Instruments
General Purpose Digital Isolator 3000Vrms 2 Channel 100Mbps 85kV/µs CMTI 8-SOIC (0.154", 3.90mm Width)
Active1,282 in stock
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Overview

The ISO7721FDR is a high-performance, dual-channel digital isolator providing 3000Vrms isolation using Texas Instruments capacitive coupling technology. It supports data rates up to 100Mbps with high common-mode transient immunity (CMTI) of 85kV/us, ensuring reliable data transmission in electrically noisy environments.

Why Choose This Part

This device features a low propagation delay of 11ns and a wide supply voltage range from 2.25V to 5.5V, facilitating seamless level translation between different logic families. Its robust electromagnetic compatibility and default low output state make it ideal for fail-safe industrial applications.

Applications

Industrial Fieldbus
Isolating RS-485, CAN, or UART signals in industrial automation systems to prevent ground loops.
Motor Control Inverters
Providing high-side gate driver signal isolation and feedback sensing in power electronics.
Battery Management Systems
Isolating communication lines between high-voltage battery stacks and low-voltage controllers.
Medical Equipment
Ensuring patient safety by providing galvanically isolated data interfaces for monitoring hardware.

Key Specifications

Type General Purpose
Data Rate 100Mbps
Technology Capacitive Coupling
Channel Type Unidirectional
Mounting Type Surface Mount
Isolated Power No
Package / Case 8-SOIC (0.154", 3.90mm Width)
Voltage - Supply 2.25V ~ 5.5V
Number of Channels 2
Voltage - Isolation 3000Vrms
Operating Temperature -55degC ~ 125degC
Inputs - Side 1/Side 2 1/1
Rise / Fall Time (Typ) 1.8ns, 1.9ns
Supplier Device Package 8-SOIC
Pulse Width Distortion (Max) 4.9ns
Propagation Delay tpLH / tpHL (Max) 16ns, 16ns
Common Mode Transient Immunity (Min) 85kV/us

Getting Started

To evaluate this part, use the ISO7721EVM evaluation module which provides a hardware platform for testing timing and isolation performance. Ensure decoupling capacitors of 0.1uF are placed as close as possible to the VCC pins on both sides of the isolation barrier.

ISO7721 Family

Comparing specs that differ across variants. The current part is highlighted.

Part Number Type Package Voltage - Isolation Stock
ISO7721FDR (this part) General Purpose SOIC-8 3000V 1,282
ISO7721FDWR General Purpose SOIC-16 5000V 14,944
ISO7721DWR General Purpose SOIC-16 5000V 6,311
ISO7721FBDWR CAN, RS232, RS485 SOIC-16 5000V 13,508
ISO7721DR General Purpose SOIC-8 3000V 1,826
Also available as: ISO7721BDWR

Also Consider

ADuM121N Analog Devices - Uses iCoupler transformer technology which provides excellent CMTI and low propagation delay jitter.
ISO7721DWR TITexas Instruments - Provides the same electrical performance but in a wide-body SOIC-16 package for applications requiring higher creepage and clearance.

Categories

Interface ICs > Digital Isolators