16:1 analog multiplexer — what the key specs mean for your signal path
The MAX306EUI+ is a single 16:1 analog multiplexer from Maxim Integrated, designed to route one of sixteen analog inputs to a common output. The 100 Ohm on-state resistance (max) sets the series insertion loss — for a 10 kOhm load, that is about 1% attenuation, negligible in most precision analog chains. The channel-to-channel matching of 1.5 Ohm keeps gain error consistent across channels, which matters when scanning multiple sensor inputs through the same conditioning stage. Switching speed is 200 ns on, 150 ns off (max), fast enough for audio-rate multiplexing and moderate-speed data acquisition up to a few hundred kHz. The -92 dB crosstalk at 100 kHz means adjacent channels couple less than 0.0025% of their signal — important when switching low-level transducer signals alongside a higher-voltage reference. Charge injection is 2 pC typical, which translates to a voltage glitch of about 2 mV into a 1 nF hold capacitor — acceptable for 12-bit settling in sample-and-hold front ends. Off-leakage is 500 pA max, so the mux will not droop a held voltage significantly over the microsecond-to-millisecond hold times typical in multiplexed ADC systems.
Supply range and temperature grade
Single-supply operation from 5 V to 30 V, or dual supplies from ±4.5 V to ±20 V. The wide range lets the mux sit on a ±15 V analog rail for industrial signal conditioning or on a single 5 V rail in a battery-powered instrument. Industrial temperature grade (-40°C to 85°C) covers factory-floor automation, outdoor telecom cabinets, and test equipment that lives in a non-conditioned environment.
Package and footprint
Housed in a 28-TSSOP (0.173" body width, 4.40 mm), the surface-mount package is a common footprint shared with many Maxim 16:1 mux variants. The supplier device package is 28-TSSOP; the shipping form is Tube. No special thermal management is needed — the 100 Ohm Ron and low leakage keep self-heating minimal.
Lifecycle and sourcing
The MAX306EUI+ carries an Active product status and is ROHS3 compliant.