INDUSTRY COMPONENT

Analog Switches (Multiplexer)

Analog switches (multiplexers) are semiconductor devices that route analog signals between multiple inputs and outputs in programmable gain amplifiers and other precision measurement systems.

View Specifications

Component Specifications

Definition
Analog switches, specifically multiplexers (MUX), are solid-state electronic components that selectively connect one of several input signals to a single output line (or vice versa) using control logic. In programmable gain amplifiers (PGAs), they enable dynamic selection of different gain settings by switching between resistor networks or feedback paths. These devices maintain signal integrity with minimal distortion, low on-resistance, and high isolation when off, making them critical for precision analog signal processing in industrial measurement and control systems.
Working Principle
Analog switches operate using MOSFET transistors as switching elements. When a control voltage is applied, the MOSFET turns on, creating a low-resistance path for the analog signal to pass through. In multiplexer configuration, digital control signals (e.g., from a microcontroller) select which input channel is connected to the output. The switch's on-resistance, charge injection, and bandwidth determine signal accuracy. In PGAs, multiplexers route signals through different gain-setting resistor networks, allowing programmable amplification without mechanical parts.
Materials
Semiconductor materials: Silicon (Si) for standard switches, Silicon-on-Insulator (SOI) for high-performance variants. Package materials: Plastic (e.g., TSSOP, QFN) or ceramic for harsh environments. Contacts: Gold-plated for low resistance and corrosion resistance.
Technical Parameters
ParameterTypical rangeNotes & selection driver
BandwidthUp to 500 MHz
Isolation>60 dB at 1 MHz
Channel Count4:1, 8:1, or dual 4:1 configurations
On Resistance5-100 ohms
Supply Voltage±5V to ±15V
Switching Time50-200 ns
Operating Temperature-40°C to +125°C

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards
IEC 60747, JEDEC JESD22

Parent Products

This component is used in the following industrial products

Programmable Gain Amplifier

An amplifier circuit within an Analog Front-End (AFE) IC whose voltage gain can be digitally controlled or programmed.

View Product Details

Engineering Analysis

Risks & Mitigation
  • Signal degradation due to on-resistance
  • Charge injection causing transient errors
  • Crosstalk between channels at high frequencies
  • Thermal drift in extreme temperatures
  • ESD damage during handling
FMEA Triads
Trigger: Exceeding maximum voltage ratings
Failure: Permanent damage to MOSFET structure, leading to short or open circuits
Mitigation: Use overvoltage protection circuits (e.g., clamping diodes), select switches with higher voltage margins
Trigger: High-frequency noise or EMI
Failure: Signal distortion, reduced signal-to-noise ratio in PGA outputs
Mitigation: Implement shielding, use low-pass filters, choose switches with high isolation and bandwidth suited to application
Trigger: Prolonged operation at high temperatures
Failure: Increased on-resistance, parameter drift, reduced lifespan
Mitigation: Ensure adequate cooling, derate specifications per datasheet, use industrial-grade components rated for extended temperature ranges

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance
On-resistance tolerance typically ±10-20%, gain error in PGA applications <0.1% with proper calibration
Test Method
Electrical testing per IEC 60747: On-resistance measurement with low-current source, bandwidth analysis via network analyzer, isolation testing with signal generators and spectrum analyzers

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation
Request current drawings, revision history, and a signed specification sheet.
Manufacturing capability
Verify equipment lists, process limits, capacity, and representative production evidence.
Inspection readiness
Confirm test methods, calibrated equipment, sampling plans, and traceable reports.
Supplier transparency
Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Analog Switches (Multiplexer)

Manufacturer profiles associated with Analog Switches (Multiplexer).

Sourcing Analog Switches (Multiplexer) from China?
Tell us your specification and target quantity — we will match it against manufacturer records and come back with the factories that fit.
Request manufacturers We manufacture this

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Related Components

Serial Interface
Serial interface for industrial data transmission between IoT gateways and legacy equipment using RS-232/422/485 protocols.
Marking Ink
Specialized ink for permanent identification on surface mount resistors during manufacturing.
Dielectric Layer
Insulating layer in surface mount capacitors that stores electrical energy through polarization.
Optical Window
Transparent optical component for light transmission in polycarbonate lens housings

Frequently Asked Questions

What is the difference between an analog switch and a digital multiplexer?

Analog switches handle continuous voltage/current signals with minimal distortion, while digital multiplexers route discrete logic levels (0/1). Analog versions prioritize parameters like on-resistance and bandwidth for signal integrity.

How do analog switches affect signal accuracy in PGAs?

Key factors include on-resistance (causes voltage drops), charge injection (introduces glitches), and bandwidth (limits frequency response). High-performance switches minimize these to maintain gain precision and linearity.

Can analog switches be used in high-voltage industrial applications?

Yes, specialized high-voltage analog switches (e.g., up to ±30V) are available for industrial control systems, but standard switches typically operate at ±15V or lower. Always check voltage ratings for compatibility.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Request Manufacturing Insight for Analog Switches (Multiplexer)

Thank you. Your request has been sent. We'll respond within 1–3 business days.
Sorry, we couldn't send your message. Please try again, or email us at contact@cnfx.com.
Analog Switch AND Gate
Get QuotesChat