YJT partner Chengdu Vcare Semiconductor
From Hardware to Full-Stack Algorithms: VC9213A + VP60A4 Opens a New Track for Wearable Health
Chengdu Vcare Semiconductor has officially released its new wearable solution VC9213A + VP60A4. As an authorized distributor, we’re bringing you a first-look technical brief to help brands quickly evaluate and deploy this “high accuracy × ultra-low power × compact” health-monitoring SoC solution.
1) Product Overview
VC9213A: Integrates 3 physical channels + 3 configurable logic channels
VP60A4: 4-element high-sensitivity photodiode array
Supports exercise heart rate (HR), resting SpO₂, liveness/wear detection, skin temperature monitoring.
Fits multiple wearable form factors: smartwatches / bands / TWS / chest-strap HR monitors.
Uses QFN 3.0 × 3.0 × 0.55 mm, 20-pin package; board area as low as 9 mm².
2) Key Selling Points
Selling Point | Highlight Parameters |
Ultra-low power | • HR mode: 60 µA @ 25 Hz (including LEDs) • SpO₂ mode: 500 µA @ 25 Hz (including LEDs) • Not-worn: ~10 µA @ 1 Hz • Sleep: 400 nA |
Accurate acquisition | • 20 kHz on-chip clock • 192-Byte FIFO • Auto dimming / wear-adaptive control |
Liveness detection | Optical + electrical + algorithmic tri-verification prevents “fake-wrist” spoofing |
Developer-friendly | • I²C up to 1 MHz, 7-bit address 0x33 • Register plug-and-play, algorithm footprint < 10 kB ROM |
Flexible power | AVDD / DVDD 3.0–3.6 V, VDDIO 1.8–3.6 V |
Engineering robustness | • LDO ripple < 40 mV, PSRR ≥ 65 dB @ 1 kHz • Complete system-level ESD design guide & recommended optical structure |
Production-ready | • MSL3 tape-and-reel (3k/reel) • Lead-free reflow peak 255 °C, 12-month storage |
3) Typical Hardware Architecture
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Recommended decoupling capacitors close to the pins: C1 100 nF / C2 1 µF / C3 100 nF.
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TEMP0 / TEMP1 / TR pins: standard 10 kΩ NTC + 10 kΩ precision resistor.
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Exposed thermal pad on the bottom: leave floating to simplify inter-layer vias in PCB stack-up.
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4) Optics & Mechanical Design
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Provides two optical layouts: watch (Layout 1) and band (Layout 2).
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Within 1 mm of the LED-PD region: no digital traces; keep EPDN/EPDP at least ≥ 40 mil from GND.
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Add a 1.5 mm annular GND ring around the PD and FR-4 reinforcement to ensure ESD & EMI robustness.
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5) Software Support
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Chip ID: 0x24 (register address 0x00)
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Algorithm resource usage (25 Hz):
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HR: 1.6 kB RAM / 9.8 kB ROM
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SpO₂: 2.1 kB RAM / 6.4 kB ROM
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Deliverables include: C-language reference driver, CSV data parsing script, and a PC host visualization tool.
6) Target Applications
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✅ 24/7 heart-rate monitoring
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✅ SpO₂ alerts & high-altitude mode
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✅ Wear-adaptive power management
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✅ Skin temperature–based sleep scoring
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✅ Sports HR straps / wellness home appliances / portable medical-grade devices
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