The ADG438F/ADG439F are CMOS analog multiplexers, the ADG438F comprising 8 single channels and the ADG439F comprising four differential channels. These multiplexers provide fault protection. Using a series n-channel, p-channel, n-channel MOSFET structure, this structure has very fast switching times (tON 250ns max and tOFF 150ns max) and high withstand voltage (–40 V, +55 V). All switches are turned off when the power supply is turned off, and if an overvoltage occurs, the analog output of the ON channel will be clamped within the power supply.
The ADG438F/ADG439F multiplexers provide fault‑protected analog switching for data‑acquisition, industrial control, avionics test equipment, and signal routing applications. ADG438F offers eight single‑ended channels, while ADG439F provides four differential channels, both featuring TTL/CMOS compatible inputs and break‑before‑make operation.
Key specifications include a -40 V to +55 V over‑voltage protection range, typical on‑resistance of 400 mΩ, fast switching times (250 ns max), and low leakage currents. The devices operate from ±15 V supplies and include ESD protection for reliable performance in harsh environments.
| Overvoltage Protection Range | -40 V to +55 V |
|---|---|
| Typical On‑Resistance (Ron) | 400 mΩ |
| Fast Switching Time (ton) | 250 ns max |
| Source OFF Leakage Current | 40.01 nA typ |
| Supply Current (Ipp) | 0.05 mA typ |
The devices can withstand continuous over‑voltage inputs from –40 V to +55 V.
The typical on‑resistance is 400 mΩ.