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AS7341

Functional Description

Datasheet

• PUBLIC

DS000504

• v3-00 • 2020-Jun-25

│ 19

8.2

Sensor Array

The device features a 4x4-photodiode array. On top and below the photodiode array there are two

photodiodes with dedicated functions such as flicker detection (

“FLICKER”) and near- infrared

response (

“NIR”). A clear channel (“C”) – photodiode without filter – is provided at the left and right

bottom corner. Each of the filter pairs can be mapped to one of the six internal ADCs (CH0

– CH5).

Figure 22:

Sensor Array

8.3

GPIO/INT

The GPIO can be either used as input for external photodiodes or as synchronization input to

start/stop the spectral measurement. (SYNS/SYND mode).The interrupt output pin INT can also be

used to indicate the status (READY/BUSY) of the spectral measurement in mode SYNS and SYND.

8.4

SMUX

AS7341 integrates a sensor multiplexer (SMUX) that enables high-flexibility photodiode channel

mapping to the six available ADCs. The 6 ADC limit requires that any measurement that includes

more than six of the 8 VIS + 3 specialty channels will require 2 integration cycles. In all cases, after

power-up, the SMUX needs to be configured before any spectral measurement is started. ams

provides reference code and an application note on how to configure the SMUX. When flicker

detection (FD) is used, the flicker diode needs to be configured to ADC5.

F L I C K E R

NIR

520µm

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