ISO7821DWW

Overview

The ISO7821DWW is a dual-channel digital isolator from Texas Instruments, housed in a 16-pin SOIC package. It supports data rates up to 100 Mb/s with a propagation delay of 11 ns and rise/fall times of 3.9 ns. The device operates on a supply voltage range of 2.25 V to 5.5 V, drawing 7.5 mA of quiescent current. It provides an insulation voltage of 5700 Vrms using capacitive coupling technology. The component functions within a temperature range of -55°C to +125°C and features unidirectional signal transmission without a shutdown mode.

Feature Summary

• Provides high-reliability galvanic isolation between circuits via capacitive coupling technology
• Supports wide supply voltage ranges for flexible level translation applications
• Ensures signal integrity with low pulse width distortion characteristics
• Operates reliably across extended industrial temperature ranges

Applications

• Industrial automation systems requiring robust signal isolation
• Medical equipment needing reinforced electrical safety barriers
• Power metering infrastructure for accurate data acquisition
• Inverter control circuits in motor drives

Procurement Notes

Verify the specific suffix against official datasheets to confirm pinout and functional compatibility. Ensure the selected variant matches the required insulation rating and operating temperature range for your application. Cross-reference manufacturer part numbers with distributor listings to avoid counterfeit components. Confirm RoHS compliance status if environmental regulations apply to your manufacturing process.

Selection Notes

Select this component when high isolation voltage and moderate data speeds are required. Compare power consumption metrics against other isolators if battery life is critical. Consider the SOIC-16 package dimensions for PCB layout constraints. Evaluate thermal performance requirements given the specified power dissipation limits under maximum load conditions.

Part Context

This device belongs to the ISO7821 series of high-performance digital isolators. It is designed to replace bulky optocouplers in modern electronic designs. The series emphasizes safety certification and long-term reliability for critical infrastructure applications. It integrates multiple channels into a compact footprint to reduce board space.

Replacement Considerations

Check for ISO7821DWWR as a tape-and-reel alternative from the same family. Verify pin-to-pin compatibility before substituting with other dual-channel isolators. Ensure replacement parts meet the same 5700 Vrms insulation rating requirements.