Dual SP4T analog switch for precision signal routing
The MAX4582CEE+T: Each switch routes one common terminal to any of four I/O ports, making it suitable for multiplexing analog signals in data acquisition, audio routing, and test equipment. With an on-resistance of 80 Ohm maximum and channel-to-channel matching of 1 Ohm, the device maintains consistent signal attenuation across all paths — a requirement for gain-stage switching where channel imbalance would introduce offset errors.
Signal integrity and switching performance
Crosstalk is rated at -96 dB at 1 MHz, meaning the isolation between active and inactive channels exceeds 60 dB across the audio band and into the low-MHz range. For a 16-bit ADC front-end multiplexing four sensor channels, this crosstalk floor keeps the inter-channel feedthrough below 1 LSB. Charge injection is specified at 0.5 pC typical — the amount of charge transferred to the signal path when the switch opens or closes. In a sample-and-hold circuit, this translates to a voltage error of 0.5 mV into a 1 nF hold capacitor; the error scales inversely with capacitance, so a larger hold cap reduces the glitch at the cost of acquisition time. Switching times are 200 ns maximum for turn-on (Ton) and 100 ns maximum for turn-off (Toff). The asymmetric timing means the break-before-make interval is at least 100 ns, preventing momentary shorting of two input channels during transition.
Dual-supply operation allows the switch to pass bipolar analog signals centered around ground without level-shifting — relevant for audio codec outputs or bipolar ADC inputs that swing below the negative rail. This limits deployment to controlled indoor environments — office equipment, benchtop instrumentation, or rack-mount gear — and excludes automotive cabin or industrial enclosures without active climate control. Leakage current in the off state is 1 nA maximum. For a 10 MOhm source impedance, this leakage introduces a 10 mV offset error; the error is negligible for impedances below 100 kOhm but becomes a design constraint in high-impedance sensor interfaces.
Package, footprint, and procurement posture
The reel quantity is the standard 2,500 pieces per reel for this package size. The part carries an active lifecycle status from Analog Devices and is RoHS3 compliant.