Product Overview
The ZSPD400X series is a complete PPG sensing solution designed specifically for smart wearable devices. Its 10µA-level low power consumption enables all-day monitoring for battery-powered wearables, coupled with excellent ambient light rejection capabilities. The platform-based hardware options range from standalone chips to integrated optical modules, supplemented by core algorithms and reference designs, all aimed at helping customers create long-lasting and precise monitoring products.
Core Value
Low PPG Power Consumption
10µA-level power consumption enables all-day monitoring for battery-powered wearables.
Ambient Light Rejection
60dB hardware-level automatic cancellation.
High-Precision Dual-Mode ADC
Supports low-power 16-bit and high-performance 24-bit output modes to balance power and precision.
Platform-Based Solution
Offers flexible choices from a standalone AFE chip to a fully integrated SiP module.
Compact Package Size
Available in an easy-to-manufacture QFN package.
Advanced AFE
Integrates ADC, LED driver, and FIFO to simplify system design.
Key Parameters
| System Power (@25mA LED) | 10 µA |
| Ambient Light Rejection Ratio | 60 dB |
| ADC Resolution | Up to 24 Bits |
| Number of LED Drivers | 3 Channels |
| LED Driver Capability | Up to 240mA/channel |
Technical Overview
- 3 independent LED drivers, up to 240mA driving current per channel.
- 4 independently programmable measurement slots for multi-parameter synchronization.
- Supports 2 differential or up to 4 single-ended photodiode inputs.
- Inherits a unique low-cost Electrocardiogram (ECG) monitoring circuit.
- Provides an I²C communication interface; all key parameters are software-configurable.
- 128-byte FIFO buffer reduces MCU wake-up frequency.
- Wide operating temperature range from -40°C to 85°C.
Application Areas
Smart Bands
Provides the core for long-battery-life, high-precision, all-day heart rate and HRV monitoring in smart bands.
Smart Rings
With its low power consumption and WLCSP package, it is the ideal choice for continuous, high-precision sensing.
Sports Heart Rate Earbuds
Integrates a high-precision PPG module into earbuds to achieve accurate, motion-resistant heart rate tracking during exercise.
Oximeters
The highly integrated module version can be directly used in fingertip or wrist-worn pulse oximeters.
About Zettasensing
Beijing Zettasensing Technology Co., Ltd., driven by the core philosophy of 'The Chip is the Sensor,' focuses on the innovative R&D of miniaturized, low-power, and intelligent sensors. By highly integrating MEMS and ASIC chips and incorporating edge intelligence, we deliver clean digital sensor data directly, aiming to drive continuous industry innovation. Compared to traditional analog sensors, Zettasensing's solutions offer significant advantages in size, power consumption, performance, and intelligence. Our product lines focus on four key areas: healthcare, human-computer interaction, smart security, and consumer electronics, and have been widely adopted in cutting-edge markets such as wearable medical devices, smart homes, new energy vehicles, and smart manufacturing. With years of deep expertise, Zettasensing possesses full-stack development capabilities for high-end sensors, empowering AI to efficiently connect with the physical world.
