INDUSTRY COMPONENT

Analog Switch

Analog switch is an electronic component used in sample-and-hold circuits to control the flow of continuous analog signals with digital control signals.

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Component Specifications

Definition
An analog switch is a solid-state semiconductor device that functions as an electronically controlled switch for analog signals. In sample-and-hold (S/H) circuits, it connects or disconnects the input analog signal to the holding capacitor based on digital control signals, enabling precise sampling of continuous waveforms for analog-to-digital conversion.
Working Principle
The analog switch operates using MOSFET transistors arranged in a transmission gate configuration. When the control signal is high (typically 5V or 3.3V), the switch closes, allowing the analog signal to pass through with minimal distortion. When the control signal is low, the switch opens, isolating the input from the output. This on/off action is controlled by digital logic while maintaining the analog signal's integrity.
Materials
Silicon semiconductor substrate with CMOS technology, aluminum or copper metallization layers, silicon dioxide insulation, plastic or ceramic packaging (DIP, SOIC, QFN)
Technical Parameters
  • Bandwidth 10-500 MHz
  • Package Type SOIC-8, TSSOP-16, QFN-20
  • On-Resistance 5-100 ohms
  • Supply Voltage ±5V to ±15V
  • Switching Time 10-100 ns
  • Control Voltage 3.3V or 5V TTL/CMOS compatible
  • Charge Injection 1-10 pC
  • Off-Leakage Current 1-100 nA
Standards
ISO 9001, IEC 60747, JEDEC JESD22

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Analog Switch.

analog switch sample-and-hold circuit CMOS switch transmission gate signal switching electronic component S/H circuit Analog Switch in Computer, Electronic and Optical Product Manufacturing

Parent Products

This component is used in the following industrial products

Sample-and-Hold (S/H) Circuit

An electronic circuit that samples an analog signal at a specific instant and holds that value constant for subsequent processing.

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Engineering Analysis

Risks & Mitigation
  • Signal distortion due to on-resistance
  • Charge injection affecting accuracy
  • Leakage current during hold phase
  • Bandwidth limitations for high-frequency signals
FMEA Triads
Trigger: Excessive on-resistance
Failure: Signal attenuation and distortion
Mitigation: Select switches with low on-resistance (<10 ohms) and ensure proper voltage biasing
Trigger: High charge injection
Failure: Sampling errors and voltage offsets
Mitigation: Use charge cancellation techniques and select switches with low charge injection specifications

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
±0.5% for on-resistance, ±1% for switching time
Test Method
IEC 60747-14 for semiconductor switches, including on-resistance measurement, leakage current testing, and switching time characterization

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

What is the difference between analog switches and digital switches?

Analog switches handle continuous voltage/current signals with minimal distortion, while digital switches handle discrete binary signals. Analog switches maintain signal integrity across their entire operating range.

Why are analog switches critical in sample-and-hold circuits?

They provide precise timing control for sampling analog signals onto holding capacitors with minimal charge injection and signal distortion, which is essential for accurate analog-to-digital conversion.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

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.

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