The ADG438F/ADG439F is a high performance 4/8 channel fault-protected analog multiplexer. This multiplexer has fast switching times (tON 250 ns max, tOFF 150 ns max), fault protection and overvoltage protection (-40 V, +55 V), all switches off with power supply off, analog output of ON channel clamped within power supplies if an overvoltage occurs, high reliability structure, TTL and CMOS compatible inputs, etc., which can be applied to data acquisition systems, industrial and process control systems, avionics test equipment, signal routing between systems and high reliability control systems.
The ADG438F (8‑channel) and ADG439F (4‑channel differential) are CMOS analog multiplexers designed for high‑reliability applications such as data acquisition, industrial control, avionics test equipment and signal routing. They feature fast switching (tON 200 ns typical), break‑before‑make operation, low on‑resistance and built‑in fault protection that turns all channels off when an over‑voltage occurs.
Key specifications include a supply voltage range up to +44 V, continuous over‑voltage tolerance from –40 V to +55 V, typical on‑resistance of 400 Ω, source/off leakage currents as low as –0.01 nA, and an operating temperature range of –40 °C to +105 °C. The devices are offered in 16‑lead plastic DIP (N‑16) and SOIC (R‑16N, R‑16W) packages.
| Maximum Supply Voltage (VDD to VSS) | +44 V |
|---|---|
| On Resistance (RON) | 400 Ω |
| Enable Turn‑On Delay (tON) | 200 ns typ |
| Source OFF Leakage Current | -0.01 nA typ |
| Operating Temperature Range | -40 °C to +105 °C |
The ADG438F has eight single‑ended channels, while the ADG439F has four differential channels.
The typical enable turn‑on delay (tON) is 200 ns.