The MAX4991-MAX4994 are low on-resistance analog switches that operate from a single +1.8V to +5.5V supply. Their features include a slow turn-on time to reduce clicks and pops caused by coupling capacitors and audio amplifiers with a DC output bias. This feature provides click-and-pop reduction without adding additional parts for existing architectures. The MAX4991-MAX4992 are dual single-pole/double-throw (SPDT) switches, while the MAX4993-MAX4994 are double-pole/double-throw (DPDT) switches. The MAX4993-MAX4994 feature an active-low enable input (EN) that sets all the channels to high impedance and reduces supply current when driven high. These devices have 0.3Ω on-resistance and 0.004% THD+N to route high fidelity audio signals. The MAX4991-MAX4994 are available in space-saving 10-pin UTQFN (1.4mm x 1.8mm) package, and are specified for operation over the -40°C to +85°C extended temperature range.
The MAX4991‑MAX4994 family are low on‑resistance analog switches that operate from a single +1.8 V to +5.5 V supply. MAX4991/MAX4993 provide a slow turn‑on feature to reduce click‑and‑pop noise in audio paths, while MAX4991‑MAX4992 are dual SPDT and MAX4993‑MAX4994 are dual DPDT switches.
Key specifications include a typical on‑resistance of 0.3 Ω, THD+N of 0.004 %, and operation over –40 °C to +85 °C in a space‑saving 10‑pin UTQFN package. The devices are suited for speaker, headset, source switching, cellular phones, portable MP3 players, and high‑fidelity audio signal routing.
| Supply Voltage Range | +1.8 V to +5.5 V |
|---|---|
| On‑Resistance (RON) | 0.3 Ω (typ) |
| Total Harmonic Distortion (THD+N) | 0.004 % (typ) |
| Package | 10‑pin UTQFN (1.4 mm × 1.8 mm) |
| Typical Supply Current | 1.2 µA (typ) |
| Operating Temperature Range | -40 °C to +85 °C |
They operate from a single +1.8 V to +5.5 V supply.
The typical on‑resistance is 0.3 Ω.
They are available in a 10‑pin UTQFN package (1.4 mm × 1.8 mm).