Clock Circuitry: Supply Voltage 1.8V to 3.3V DC

Q: Why is low jitter important in Audio DAC clock circuitry?

Low jitter minimizes timing errors during digital-to-analog conversion, reducing audio distortion and improving sound quality by ensuring accurate sampling intervals.

Q: What are common clock frequencies used in Audio DACs?

Common frequencies include 44.1 kHz (CD quality), 48 kHz (professional audio), 96 kHz, and 192 kHz for high-resolution audio formats.

Component Specifications

Definition

Clock circuitry in Audio DAC (Digital-to-Analog Converter) systems is an electronic component responsible for generating stable, low-jitter clock signals that synchronize digital data processing and analog conversion. It typically consists of crystal oscillators, phase-locked loops (PLLs), and frequency dividers to produce master clock frequencies (e.g., 44.1 kHz, 48 kHz, 96 kHz, 192 kHz) with minimal phase noise, ensuring accurate sampling and reconstruction of audio signals.

Working Principle

Operates by using a quartz crystal oscillator to generate a stable reference frequency, which is then processed through PLL circuits to multiply or divide frequencies as needed. The circuitry maintains precise timing by comparing phase differences between input and output signals, adjusting voltage-controlled oscillators to minimize jitter and ensure synchronization with digital audio data streams.

Materials

Quartz crystal (SiO₂), silicon semiconductor substrates (for ICs), ceramic or plastic packaging, gold bonding wires, copper traces on FR-4 PCB material.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Jitter	< 1 ps RMS
Phase Noise	-150 dBc/Hz at 100 kHz offset
Output Voltage	3.3V LVCMOS or 1.8V LVDS
Supply Voltage	1.8V to 3.3V DC
Frequency Stability	±10 ppm to ±50 ppm
Operating Temperature	-40°C to +85°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 60749, JEDEC JESD22

Parent Products

This component is used in the following industrial products

Audio DAC

Electronic component that converts digital audio signals to analog signals for playback

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Signal Processing IC

Integrated circuit designed to process electrical signals within control systems

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Engineering Analysis

Risks & Mitigation

Clock signal interference from EMI/RFI
Temperature-induced frequency drift
Component aging affecting stability
Power supply noise introducing jitter

FMEA Triads

Trigger: Crystal oscillator failure due to mechanical shock
Failure: Loss of clock signal leading to complete audio system failure
Mitigation: Use shock-mounted oscillators and implement redundant clock sources

Trigger: Power supply voltage fluctuations
Failure: Increased jitter causing audible audio distortion
Mitigation: Implement dedicated voltage regulators and filtering circuits

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Frequency tolerance within ±50 ppm, jitter below 50 ps peak-to-peak

Test Method

Jitter analysis using spectrum analyzers, phase noise measurement, temperature cycling tests per IEC 60749

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 Clock Circuitry

Manufacturer profiles associated with Clock Circuitry.

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Frequently Asked Questions

Why is low jitter important in Audio DAC clock circuitry?