The ADG728 / ADG729 is a CMOS low-voltage 2-wire serially controlled matrix switch produced by Analog Devices. The chip has 8 channels and dual 4 channels. The switch resistance is well matched and can be used as a multiplexer, demultiplexer or switch array.
The ADG728 is an 8‑channel matrix switch and the ADG729 is a dual 4‑channel matrix switch. Both devices use a 2‑wire serial interface compatible with the ?’C™ standard and can operate from a single 2.7 V to 5.5 V supply. They feature closely matched on‑resistance, break‑before‑make switching, and are offered in a 16‑lead TSSOP package.
Key specifications include a typical on‑resistance of 2.5 Ω, leakage currents as low as 0.01 nA, a bandwidth of up to 100 MHz for the ADG729, and an operating temperature range of –40 °C to +85 °C. An automotive‑qualified version (ADG728W) is also available.
| Supply Voltage Range | 2.7 V to 5.5 V |
|---|---|
| Typical On‑Resistance (Ron) | 2.5 Ω |
| On‑Resistance Flatness | 0.75 Ω typ |
| Leakage Current (OFF, source) | 0.01 nA typ |
| Maximum Continuous Current (ADG729) | 80 mA |
| Package | 16‑lead TSSOP (RU‑16) |
| Operating Temperature Range | –40 °C to +85 °C |
| Bandwidth (ADG729) | 100 MHz |
Both devices operate from a single supply of 2.7 V to 5.5 V.
The ADG728 is an 8‑channel matrix switch.
The typical on‑resistance is 2.5 Ω.
Yes, the ADG728W model is qualified for automotive applications.