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AS7421 Hyperspectral NIR Sensor

64-channel hyperspectral NIR Sensor


  • 64 channel photodiode matrix
  • Spectral range 750-1050nm (61 wavelengths, 5nm separation)
  • Integrated NIR LEDs to cover range from 750nm to 1050nm
  • Integrated micro optics to limit angle of incidence of sensor (Micro Lens Array)
  • 16 independent ADCs with programmable gain and integration time
  • Typical integration time for 64 channel is 262ms - I²C interface and interrupt
  • Power consumption (typ): 2,5mA active, 2µA sleep
  • Module size 6.6 x 6 x 2.2mm (OLGA 10 package)


  • Near infrared spectral footprint analysis of materials, goods, substances, fabrics, foodstuff and more
  • High resolution for spectral identification purposes
  • All-in-one module enables high sensor stability at fast readout speeds
  • Low-cost sensor solutions compared to usual lab equipment such as spectrometers

Product parameters

Sensor Type 64-channel NIR Spectral Sensor
Applications Multi-purpose sensor
Package OLGA-10
Size [mm] 6.6 x 6 x 2.2
Supply Voltage [V] 3.3V
Temperature Range [°C] -30-60°C

General description

The AS7421 hyperspectral NIR Sensor is a versitile spectrometer-on-chip solution that enables the usage of near infrared detection technology for material or substance detection purposes. The technology enables to: - Identify an object by comparing the measured spectrum with a reference spectrum of an object in a lookup table.
- Derive the composition of a sample by evaluating the measured spectrum with a model (teaching methods)
- Signal the relative changes of concentration of a component of an object
- Signal the properties of an object (end user) 

This product suits for the following applications:

  • Reflective object spectral sensor for material analysis in home/industrial applications
  • Fabric identification and detection
  • Moisture measurements in industrial, home appliance and agricultural applications E.g.: control drying process of grain, coffee beans to monitor quality
  • Fruit & foodstuff parameter measurements before and after harvesting
  • Floor type and moisture detection of surfaces in home and industrial robotics


Title Category Headline Buy
AS7421 Eval Kit Application Board Evaluation Kit for AS7421

Technical documents

Type Description Language
Datasheet AS7421 Datasheet English
Application Note AS7421 EVK Calibration Procedure English
Application Note AS7421 External LED Synchronization English

Other information

Type Description Language
Block Diagram AS7421 Block Diagram
Image AS7421 product Image
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