YY-IC Integrated Circuit Semiconductor Component Supplier

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In a two-way radio base station, uplink/downlink audio must resist strong RF fields. We hold A-weighted SNR ≥110 dB, THD+N ≤0.0005% at 1 kHz, PSRR >90 dB @217 Hz, crosstalk <−90 dB, and phase margin ≥60°. Transport aggregates on TDM 8-slot @12.288 MHz; PDM telemetry monitors mic bias. Boundaries include −40–85 °C, 3.3 V ±10% rails, and surge on long cables. Regulatory targets: CISPR 32 and IEC 61000-4-2; safety by IEC 62368-1. We deploy spread-spectrum PWM, π-filters, Kelvin star grounds, differential FE, Zobel damping, and guarded ADC perimeters. Qualification relies on FFT sweeps, A-weighted noise, and GTEM scans. Result: improved link intelligibility and reduced maintenance — details: TDM 8-slot @12.288 MHz aggregator.
For an AR headset, acoustics must be precise yet power-frugal. The system targets THD+N ≤0.0008%, A-weighted SNR ≥106 dB, output noise under 20 μVrms, and flatness ±0.1 dB across 20 Hz–20 kHz. Transport is PDM bridge at 1–3.2 MHz into an I2S DAC island; boundaries include −40–105 °C and 1.8–3.6 V supply span. Compliance follows CISPR 32 and IEC 62368-1 with IEC 61000-4-2 at shell contacts. Design uses π-filter rails, star-ground stitching, differential front-ends, soft-start, Zobel damping, and ferrite/LC reconstruction. Validation spans FFT sweeps, noise floors, GTEM pre-scans, and thermal drift. BOM stability is preserved via pin-compatible alternatives — details: WLCSP short-trace parasitics.
A conference speakerphone demands echo-canceller-friendly references. We maintain THD+N ≤0.0005% at 1 kHz, A-weighted SNR ≥110 dB, PSRR >90 dB @217 Hz, crosstalk <−90 dB, and gain error <0.5%. Transport uses USB Audio Class 2.0 24-bit/96 kHz; boundaries include −40–85 °C and hot-plug events. Compliance follows CISPR 32 and IEC 61000-4-2 hardening at ports. We apply spread-spectrum PWM, π-filters, Kelvin star grounding, differential FE, soft-start sequencing, and debounced jack-detect to minimize pops. Tests cover FFT sweeps, A-weighted noise, and thermal drift profiles; GTEM scans shape copper and shield cans. Outcome: cleaner convergence and fewer retries in far-end echo cancellers — details: A-weighted noise floor verification.
An ultra-compact dashcam mixes tight thermals with strict EMC. We hold THD+N ≤0.0008%, A-weighted SNR ≥106 dB, output noise under 20 μVrms, and phase margin ≥60°. Transport is I2S 48/96/192 kHz; constraints include −40–105 °C ambient, 3.3 V ±10% rails, and cable ESD. Emissions follow CISPR 32 Class-B; ports apply IEC 61000-4-2. Layout leverages QFN with exposed thermal pad, short returns, and a guarded ADC ring. Control uses spread-spectrum PWM, π-filters per domain, soft-start (~5 ms), Zobel damping, ferrite/LC reconstruction, and Kelvin star grounding. Validation spans FFT sweeps, GTEM pre-scans, and thermal chamber drift profiles. The result is artifact-free start/stop chirps and fewer field returns — details: thermal pad QFN θJA control.