AS7421-DOLT

AS7421 64-channel hyperspectral NIR sensor is a near infrared digital spectrometer for spectral identification and spectral footprint analysis used in consumer devices. The spectral response of the sensor is defined in the wavelengths from approximately 750nm to 1050nm and the channels are equally distributed over the mentioned range. Once a spectral measurement is started, all 64 channels are processed automatically by 16 parallel sampling ADCs with four consecutive integration cycles. AS7421 integrates Fabry-Perot filters into standard CMOS silicon via nano-optic deposited interference filter technology and its package provides a built in aperture and micro optics to control the light entering the sensor array. In addition, the module provides a near infrared (NIR) light source and an integrated LED driver to control it. Control and Spectral data access is implemented through a serial I²C interface.

• Miniaturized reflectance/absorbance spectral analysis and material identification in NIR range
• 61 individual and 4 special purpose spectral channels with a FWHM of typical 10nm
• 16bit full scale resolution per spectral channel, synchronization of spectral measurement
• Fast measurement time, 16 parallel sampling ADCs with individual gain settings
• 256ms to obtain measurement data for all 64 channels
• High module integration and low BOM, integrated 64-channel sensor with on chip Fabry-Perot filters
• Integrated NIR light source (LED) to cover 750-1050nm range
• Integrated programmable LED driver, integrated optics to limit AOI on sensor
• Low power consumption and minimum I²C traffic
• 3.3V VDD operation, configurable sleep mode, interrupt-driven device