February 2026 – InfraTec Digitalizes Pyroelectric Detection
InfraTec, a leading manufacturer of infrared detectors, has announced a new series of digital pyroelectric detectors featuring an integrated I2C interface. The LIE-700 Digital series brings programmability and smart features to pyroelectric sensing.
LIE-700 Digital Series Features
Key Specifications
- Interface: I2C (up to 400 kHz) with configurable address
- Resolution: 16-bit ADC for signal digitization
- Programmable Gain: 1x to 128x in software
- Configurable Filters: Digital high-pass and low-pass filters
- Detection Algorithm: On-chip motion detection with adjustable threshold
- Interrupt Output: Programmable interrupt on motion detection
- Power Consumption: 50 µA in active mode, 2 µA in standby
- Package: Standard TO-5 and SMD options
Smart Features
Programmable Detection Parameters
Unlike traditional analog PIR sensors, the LIE-700 Digital allows software configuration of:
- Sensitivity threshold (8-bit adjustable)
- Block time (from 0ms to 10 seconds)
- Detection mode (motion-only or presence-sensitive)
li>Hold time (from 100ms to 10 minutes)
On-Chip Signal Processing
The integrated DSP can perform basic motion classification, distinguishing between human motion and environmental noise. Future firmware updates may add pet discrimination capabilities.
Diagnostic Features
The sensors provide diagnostic information including:
- Raw signal level (for advanced processing)
- Noise floor measurement
- Temperature compensation status
- Fault detection (lens blocked, sensor failure)
Benefits for System Designers
- Simplified Hardware: No external ADC, comparator, or timing components needed
- Reduced PCB Area: All signal processing integrated
- Flexibility: Parameters can be adjusted in firmware, even after deployment
- Multi-Sensor Arrays: Multiple sensors on same I2C bus with different addresses
- Calibration: Factory-calibrated, no field adjustment needed
Target Applications
- Smart building sensors with remote configuration
- IoT devices requiring field adjustment
- Security systems with multiple sensors
- Industrial automation with diagnostic requirements
- Research and development platforms
Development Tools
InfraTec offers an evaluation kit including:
- Sensor module with pre-mounted lens
- USB-to-I2C interface board
- Windows GUI for configuration and data logging
- Arduino and Raspberry Pi library examples
Availability and Pricing
The LIE-700 Digital series is available now for sampling, with volume production starting Q2 2026. Pricing is expected to be approximately 30% higher than equivalent analog sensors, reflecting the additional integrated functionality.
Industry Reaction
“Digital interfaces are the future of sensing,” said an industry analyst. “InfraTec’s move to I2C brings pyroelectric sensors in line with other modern sensor types like temperature, humidity, and light sensors. This will accelerate adoption in smart applications.”