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.

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
ParameterTypical rangeNotes & selection driver
Bandwidth10-500 MHz
Package TypeSOIC-8, TSSOP-16, QFN-20
On Resistance5-100 ohms
Supply Voltage±5V to ±15V
Switching Time10-100 ns
Control Voltage3.3V or 5V TTL/CMOS compatible
Charge Injection1-10 pC
Off Leakage Current1-100 nA

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

Standards
ISO 9001, IEC 60747, JEDEC JESD22

Parent Products

This component is used in the following industrial products

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

Typical Suppliers & Equivalents

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

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 Switch

2 companies list this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

ETEK Microelectronics
Jiangsu, CN
ISO 26262
Listed on the company's own website · profile compiled by CNFX from public sources
Shanghai Belling Co., Ltd.
Shanghai, CN
Listed on the company's own website · profile compiled by CNFX from public sources

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

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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.

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.

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