Описание
The MAX4746 dual SPDT (single-pole/double-throw) audio switches feature negative signal capability that allows signals as low as VCC – 5.5V to pass through without distortion. These analog switches have a low on-resistance and low supply current, and operate from a single +1.8V to +5.5V supply. The MAX4744/MAX4744H have internal shunt resistors that automatically discharge the capacitance at the normally open (NO) and normally closed (NC) terminals when they are not connected. The MAX4746H features internal shunt resistors on NC_ terminals. This reduces click-and-pop sounds that occur when switching audio signals between precharged points. A break-beforemake feature further reduces popping. The MAX4744/ MAX4745 control the switches with two control bits CB1 and CB2. The MAX4746 have one control bit to switch both switches and an enable input EN to put the switches in a high-impedance mode. The MAX4746 also have an internal protection network against voltages applied to COM_ when VCC = 0V. These devices are available in a space-saving 10-pin µDFN (2mm x 2mm) package and operate over the -40°C to +85°C extended temperature range.
- Distortion-Free Negative Signal Throughput Down to VCC – 5.5V
- Internal Shunt Resistor Reduces Click/Pop (MAX4744/MAX4744H)
- 0.6O (typ) Low On-Resistance
- 0.1O (max) Channel-to-Channel Matching
- 0.55O (max) On-Resistance Flatness
- +1.8V to +5.5V Single-Supply Voltage
- 0.01% (typ) Total Harmonic Distortion
- -75dB (typ) Crosstalk (100kHz)
- -68dB (typ) Off-Isolation (100kHz)
- Available in 10-Pin µDFN Package (2mm x 2mm)
