Active dual SP4T mux with 10Ω Ron and -96dB crosstalk
The MAX4618CUE+T from Analog Devices packs two independent SP4T switches into a single 16-TSSOP package, each channel acting as a 4:1 multiplexer or demultiplexer. With a maximum on-resistance of 10Ω and channel-to-channel matching within 200mΩ, it handles precision analog signals without introducing gain errors or offset between paths. Crosstalk is specified at -96dB at 100kHz, meaning a signal on one active channel couples into an off channel at less than 16 µV per volt of signal — important for audio crosspoint switches or multi-channel data acquisition where channel bleed would corrupt measurements. Switching times of 15 ns (on) and 10 ns (off) allow fast channel selection in multiplexed ADC front-ends or RF signal routing without adding latency that would limit the sample rate.
Supply range and charge injection for signal integrity
The charge injection is just 3pC — when the switch toggles, the injected charge translates to a voltage glitch across the load capacitance; at 10pF load, that's roughly 300 µV of disturbance, which is negligible for most 12-bit ADC applications. Off-leakage current is a maximum of 1nA at 25°C, rising with temperature but staying below 10nA at 70°C. In a high-impedance sensor interface with a 1MΩ source, 1nA leakage creates only 1mV of offset error — well within the noise floor of a 10-bit system. Channel capacitance measures 5pF (source off) and 15pF (drain off). The larger drain capacitance dominates the bandwidth when the switch is off; for a 50Ω source, the -3dB point is around 210 MHz, so the part is usable well into the low RF range.
Active lifecycle and ROHS3 compliance for production
ROHS3 compliant, the part meets the latest EU directive for lead-free and restricted-substance materials, simplifying global regulatory acceptance without requiring a waiver or exemption review.