6 Best Analog Multiplexers Engineers Rely On for Precision

As I needed to route multiple sensor signals into a single ADC on a compact PCB, the choice of analog multiplexer shaped the whole design. I’ve seen the NOYITO 74HC4051 and CANADUINO CD74HC4067 handle that job well, but each fits a different use case. The right part can simplify wiring, preserve signal quality, and avoid subtle errors. The tradeoffs get interesting fast, especially at the time video, channel count, and resistance start competing.

More Details on Our Top Picks

1. NOYITO 74HC4051 8-Channel-Mux Analog Multiplexer Selector Module

   Best for Hobbyists

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   The NOYITO 74HC4051 8-channel analog multiplexer selector module is a solid pick should you need a compact, low-cost switch for routing analog or digital signals with simple 3-bit control. You use S0-S2 to choose one of eight channels while E low connects it in a low-impedance state. Raise E, and all paths go high-impedance. It runs from 2.0V to 10.0V, handles -5V to +5V analog swings, and can translate 5V logic cleanly. You also get ESD protection, wide temperature tolerance, and a tiny purple board.

   • Channel Count:8-channel
   • Signal Type:Analog
   • Module Form:Selector module
   • Control Pins:3 selects + enable
   • Operating Voltage:2.0V–10.0V
   • Package Quantity:1 module
   • Additional Feature:±5V analog range
   • Additional Feature:80 ohm typical
   • Additional Feature:ESD protected inputs

2. 10pcs 74HC4051 Analog Multiplexer Module for Raspberry Pi

   Best Bulk Pack

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   Should you be wiring a Raspberry Pi into a project that needs to read or route multiple analog signals, the 10-piece 74HC4051 CJMCU module is a strong fit. You get eight bidirectional channels, Y0 through Y7, plus a common Z pin, so you can scan sensors with only three select lines and one enable. The chip runs from 2.0V to 10.0V, handles -5V to +5V analog signals, and supports 5V logic translation. As E goes low, you choose one path; once it goes high, you isolate all channels.

   • Channel Count:8-channel
   • Signal Type:Analog
   • Module Form:Module
   • Control Pins:3 selects + enable
   • Operating Voltage:2.0V–10.0V
   • Package Quantity:10 modules
   • Additional Feature:Raspberry Pi compatible
   • Additional Feature:10-piece bundle
   • Additional Feature:ESD protected inputs

3. NOYITO CD74HC4067 16-Channel Analog Multiplexer Module

   Best 16-Channel Pick

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   NOYITO’s CD74HC4067 breakout is a strong pick should you need a straightforward way to route many signals with minimal wiring, especially for prototypes and compact sensor systems. You get a 16-channel analog multiplexer built around the CD74HC4067, with C0 to C15 tied to a common COM/SIG pin. Use S0 through S3 to select each channel, and you can pass either analog or digital signals bidirectionally. Just keep every signal within VCC. It’s handy whenever you want to scan sensors into one ADC and simplify routing during development.

   • Channel Count:16-channel
   • Signal Type:Analog/digital
   • Module Form:Breakout module
   • Control Pins:4 selects
   • Operating Voltage:Up to VCC
   • Package Quantity:1 module
   • Additional Feature:16-channel routing
   • Additional Feature:Bidirectional signal handling
   • Additional Feature:Rotary-switch style

4. 3 x CANADUINO® CD74HC4067 16-Channel Analog Multiplexer/Demultiplexer

   Best for Prototyping

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   CANADUINO®’s CD74HC4067 breakout board stands out whenever one needs to shrink a multi-sensor setup down to one analog pin, since its 16-channel selection via just 4 address lines makes wiring far simpler. You are able to run it at 2–6V, so it fits both 3.3V and 5V systems. Utilize it to read 16 analog inputs, or switch one analog output across 16 destinations. Built by UNIVERSAL-SOLDER Electronics around a Texas Instruments chip, it’s lightweight and not machine-specific. In case you need setup details, download the datasheet and check the warranty for support.

   • Channel Count:16-channel
   • Signal Type:Analog
   • Module Form:Breakout board
   • Control Pins:4 address lines
   • Operating Voltage:2V–6V
   • Package Quantity:3 modules
   • Additional Feature:3.3V and 5V
   • Additional Feature:Single ADC input
   • Additional Feature:Texas Instruments chip

5. 4 Channel Analog Video Multiplexer for Security Cameras

   Best for Video Signals

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   Should you need a simple way to run four analog security cameras without reworking your setup, the 4 Channel Analog Video Multiplexer fits well. You can transmit four camera feeds at once, which helps you scale surveillance without replacing your existing gear. It supports single-channel pass-through and three-channel superimposed operation, while the modular design fights interference and preserves video quality. You can place the transmitter and receiver up to 400 meters apart. Because it’s plug and play, you won’t need terminal changes, debugging, or downtime. It also supports hot swapping and easy integration into current systems.

   • Channel Count:4-channel
   • Signal Type:Analog video
   • Module Form:Video multiplexer
   • Control Pins:Plug-and-play
   • Operating Voltage:Not specified
   • Package Quantity:1 unit
   • Additional Feature:400-meter transmission
   • Additional Feature:Hot swap support
   • Additional Feature:Interference-resistant design

6. Analog Multiplexer IC (ADG509AKNZ) Pack of 1

   Best Precision IC

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   The ADG509AKNZ analog multiplexer/demultiplexer IC is a solid pick should you need a compact 2 x 4:1 switch with through-hole PDIP-16 packaging, especially for bench builds and prototypes that call for easy soldering. You get a low-600 μA supply draw, 700 Ω on resistance, and support for single or dual rails, so you can fit it into varied analog paths. It runs from -40°C to +85°C, and its voltage limits reach +16.5V or ±16.5V depending on supply mode. You’ll also appreciate Analog Devices’ documentation, 30-day returns, and one-piece packaging.

   • Channel Count:2 x 4:1
   • Signal Type:Analog
   • Module Form:IC
   • Control Pins:Multiplexer interface
   • Operating Voltage:+10.8V to +16.5V
   • Package Quantity:1 IC
   • Additional Feature:2×4:1 configuration
   • Additional Feature:700 ohm resistance
   • Additional Feature:Through-hole PDIP-16

Factors to Consider When Choosing Analog Multiplexers

At the time I choose an analog multiplexer, I initially check the channel count, voltage range, and on resistance to make sure it fits the job. I also look at the control logic so it matches your system without extra hassle. Finally, I consider the package type because it can affect board space, assembly, and thermal performance.

Channel Count

Channel count is one of the initial things I look at because it tells me how many independent analog signals a multiplexer can route, and most common parts fall around 8 to 16 channels. I match that count to the number of signals I need to manage so I don’t create a bottleneck later. An 8-channel device works well whenever I only need to choose among eight inputs, while a 16-channel part gives me more routing flexibility for larger systems. Higher counts can reduce the need for extra hardware and make signal handling more efficient. I also keep in mind that more channels can mean more control complexity, since I might need additional select lines like S0 through S3 to address everything cleanly.

Voltage Range

After I’ve matched the channel count to my system, I check the voltage range next because it determines which signal levels the multiplexer can safely handle. I compare the device’s minimum and maximum ratings with my source and load voltages, since the input signals must stay between VCC and VEE. Many parts cover 2.0V to 10.0V, which gives me room for low- and higher-voltage designs. Whenever my analog inputs need to swing around -5V to +5V, I make sure the specification fits that span exactly. In the event that it doesn’t, I expect distortion, and I might damage the device. That simple check helps me avoid unreliable behavior and keeps my circuit working the way I designed it.

On Resistance

On resistance is the next spec I check because it tells me how much the multiplexer will load my signal in the on state. I look for a low RON, often around 60 to 80 ohms, because it keeps voltage drop small and preserves signal integrity. That matters most whenever I’m routing fast or delicate analog signals. I also compare RON at the exact supply and signal levels I plan to use, since it can shift with input and output voltage. In case I’m designing for a battery-powered device, I pay attention to its impact on power dissipation too. Lower resistance usually means less wasted energy and a cleaner path through the switch, which helps me choose a part I can trust.

Control Logic

Once I’ve checked on resistance, I look at the control logic because it tells me how easily I can actually use the multiplexer in my design. I want clear select lines, usually S0, S1, S2, and so on, because they let me route one input to the output without guesswork. For small 2-to-1 or 4-to-1 parts, the coding stays simple, but larger 8-to-1 or 16-to-1 devices need more careful planning. I also check the enable pin, since many parts use an active-low E signal; I need that pin low for the chosen channel to conduct properly. Finally, I verify logic-level compatibility so my 5V control signals will work cleanly with the analog range I’m switching.

Package Type

Package type matters to me because it affects how easily I can mount the multiplexer and fit it into the board layout. I usually choose between through-hole and surface-mount options based on assembly flow and space. Should I need a compact design, I lean toward smaller packages that save weight and board area. I also check whether the package matches my existing PCB footprint, because a mismatch can slow integration or force layout changes. In harsh environments, I look for packages that protect better against heat, humidity, and vibration. Thermal performance matters too; some packages spread heat more effectively, which helps in high-power or high-frequency circuits. I treat package selection as a practical fit issue, not just a catalog detail.

Frequently Asked Questions

How Do Analog Multiplexers Affect Signal Distortion in High-Frequency Circuits?

Analog multiplexers can distort high frequency signals by adding on resistance, switch capacitance, and charge injection, which can slow edges and shift phase. Using low capacitance parts and tight PCB layout helps reduce signal loss.

What Package Types Are Preferred for Dense Analog Multiplexer Layouts?

For dense analog multiplexer layouts, I favor compact QFN and TSSOP packages because they reduce board area, limit parasitics, and make routing easier. If an even smaller footprint is required, wafer level chip scale packages are the next choice.

How Does Leakage Current Impact Low-Level Sensor Measurements?

Leakage current can distort tiny sensor signals; even 1 nA across 1 MΩ produces a 1 mV error. It shifts readings, adds drift, and masks real changes, so I use low leakage switches and guard traces.

Can Analog Multiplexers Handle Bipolar Signals Without Added Circuitry?

Yes, I can switch bipolar signals if my supply rails, common mode range, and signal amplitude stay within the multiplexer limits. I need extra circuitry whenever the signal goes beyond those limits or when I must keep the polarity unchanged.

What Testing Methods Verify Channel-To-Channel Isolation Accurately?

I verify channel to channel isolation by energizing one channel, holding the rest at ground, and measuring leakage with a precision analyzer. I also sweep frequency, temperature, and voltage to reveal hidden coupling paths.