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AS7341
Functional Description
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
520µm
F L I C K E R
C
F1
F6
F4
F7
F3
F8
F2
F5
F5
F2
F8
F3
F7
F4
F6
F1
C NIR
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.
Datasheet
• PUBLIC
DS000504
• v3-00 • 2020-Jun-25
68
│ 19
