MAX394 is a low-voltage quad single-pole double-throw (SPDT) analog switch produced by MAXIM. The working voltage range is ±2.7V to ±8V, or a single supply of +2.7V to +15V. The switch resistance is low, less than 35Ω, and is guaranteed to be matched within 2Ω between channels and to remain flat over the analog signal range (Δ4Ω max). The switching time is also short, with a turn-on time of less than 10ns, a turn-off time of less than 75ns, and a turn-on time of less than 130ns. The static current of the switch is small, less than 1µA at all inputs high or low, making it ideal for portable devices. The switch is fabricated using MAXIM's low-voltage silicon-gate process. Design improvements guarantee extremely low charge injection (10pC), low power consumption (10µW), and electrostatic discharge (ESD) greater than 2000V. Logic inputs are TTL and CMOS compatible and guaranteed over a +0.8V to +2.4V range for supply voltages up to +8V. When supplies exceed +8V, the inputs are typically +0.8V to +4V. Logic inputs and switched analog signals can range anywhere between the supply voltages without damage.
The MAX394 analog switch from Maxim Integrated is a precision, low‑voltage, quad, single‑pole/double‑throw device. It operates from bipolar supplies of +2.7 V to +8 V or a single supply of +2.7 V to +15 V and offers very low on‑resistance (typical <35 Ω) and ultra‑low quiescent current (<1 pA).
Key features include break‑before‑make switching (10 ns typical), turn‑on time <130 ns, turn‑off time <75 ns, charge injection <10 pC, off‑channel leakage <2.5 nA at +85 °C, and ESD protection greater than 2000 V. The device is TTL/CMOS‑compatible and can handle rail‑to‑rail analog signals.
| On‑Resistance (typical) | < 35 Ω |
|---|---|
| Charge Injection (typical) | < 10 pC |
| Off‑Channel Leakage (max, +85 °C) | < 2.5 nA |
| ESD Rating | > 2000 V (Method 3015.7) |
| Supply Voltage Range (single‑supply) | +2.7 V to +15 V |
| Supply Voltage Range (dual‑supply) | +2.7 V to +8 V |
| Quiescent Current | < 1 pA |
| Turn‑On Time | < 130 ns |
| Turn‑Off Time | < 75 ns |
| Break‑Before‑Make Delay | 10 ns (typical) |
The MAX394 can operate from a single supply of +2.7 V up to +15 V.
The typical on‑resistance is less than 35 Ω.
Charge injection is guaranteed to be less than 10 pC.
It is rated for ESD protection greater than 2000 V per Method 3015.7.