ADG821

PRODUCTION

<1 Ω, Low Voltage (1.8 V - 5.5 V) Dual SPST Switches - Normally Open

Analog Devices ADG821 Product Info

10 February 2026 5

Features

0.8 Ω Max On Resistance @125°C
0.3 Ω maximum on resistance flatness @ 125°C
1.8 V to 5.5 V Single Supply
200 mA Current Carrying Capability
Automotive Temperature Range: –40°C to +125°C
Rail-to-Rail Operation

33 ns Switching Times
8-Lead MSOP Package
Typical Power Consumption (<0.01 µW)
TTL/CMOS Compatible Inputs
Pin Compatible with ADG721/722/723

Part details & applications

The ADG821 / ADG822 / ADG823 are monolithic CMOS single-pole, single-throw (SPST) switches. These switches are designed on an advanced submicron process that provides low power dissipation, yet gives high switching speed, low on resistance, and low leakage currents.

The ADG821 / ADG822 / ADG823 are designed to operate from a single 1.8 V to 5.5 V supply, making them ideal for use in battery-powered instruments. Each switch of the ADG821 / ADG822 / ADG823 conducts equally well in both directions when on. The ADG821 / ADG822 / ADG823 contain two independent SPST switches. The ADG821 and ADG822 differ only in that both switches are normally open and normally closed, respectively. In the ADG823, Switch 1 is normally open and Switch 2 is normally closed. The ADG823 exhibits break-before-make switching action.

The ADG821 / ADG822 / ADG823 are available in an 8-lead MSOP.

APPLICATIONS

Power routing
Battery-powered systems
Communication systems
Data acquisition systems
Audio and video signal routing
Cellular phones
Modems
PCMCIA cards
Hard drives
Relay replacement

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