Product Overview
The ZSAD12XX series is a highly integrated ASIC for weak signal acquisition, designed to solve the 'impossible triangle' between high performance, low power consumption, and design complexity in traditional discrete component solutions. It utilizes the proprietary ZS DirectADC™ technology to achieve the shortest, cleanest signal path from the sensor to the digital domain without requiring a PGA. This single-chip solution simplifies complex analog front-end design into a simple digital interface connection, providing customers with a high-performance, low-power, and cost-effective solution that shortens product development cycles and accelerates time-to-market.
Core Value
Conquering High Impedance
ZSAD120X: A single chip solves the challenge of femtoampere-level signal processing for pyroelectric detectors.
Excellent Power Efficiency
ZSAD121X: Low power consumption provides outstanding battery life for portable and IoT devices.
Simplified System Integration
Supports I²C and the single-wire DOCI interface, allowing direct replacement of traditional analog solutions.
Single-Chip Solution
Replaces complex discrete components, significantly simplifying design and shortening the development cycle.
Ultra-Small Package Size
Integrated temperature and humidity compensation algorithms ensure measurement accuracy in complex environments.
High Precision, Low Noise
Up to 84dB SNR and 14-bit effective resolution to accurately capture weak signals.
Key Parameters
| Parameter | ZSAD120X | ZSAD121X |
|---|---|---|
| Target Detector | Pyroelectric | Thermopile |
| Input Impedance | 10GΩ ~ 1.28TΩ | - |
| SNR | Up to 84dB | |
| Operating Current (@500sps) | ~40µA (Dual Channel) | |
| Input Range (Differential) | ±82mV | |
| Sampling Rate | 125sps ~ 8ksps | |
Technical Overview
- Direct-to-digital architecture for minute signals without a PGA (ZS DirectADC™)
- ZSAD120X: Programmable high input impedance (10GΩ ~ 1.28TΩ)
- ZSAD121X: Low power consumption, typical operating current of only 40µA (@500sps)
- Up to 14-bit effective resolution, with an LSB output of just 2.5µV
- Flexible sampling rate control (125sps ~ 8ksps)
- Built-in programmable digital low-pass/high-pass filters
- Digital output is a 16-bit signed conversion result, accurately reflecting signal changes
- Available in DFN-8 (2x2mm) package and as bare die
Application Areas
Precision Instrumentation
For professional equipment requiring high-impedance or weak signal measurement.
PAS Sensors
High-precision processing of microphone signals, successfully implemented in the ZSGS5000.
NDIR Gas Sensors
Provides a high-performance front-end solution for pyroelectric/thermopile detectors.
Flame Detectors
Accurately captures dynamic infrared signals generated by flame flicker.
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.
