Broadcom

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APDS-9200

Data Sheet

Figure 1 Functional Block Diagram

Detailed Description

The APDS-9200 device contains multiple photodiodes for UV and Ambient Light Sensing as well as temperature compensation that

are designed in a matrix placement to achieve optimum angular response at the fall of incident light angle. The photodiode

currents are converted to digital count by ADCs. The ADC resolution is selected from 13 bits to 20 bits and the conversion time is

registers. APDS-9200 has a programmable interrupt with hysteresis to respond to events which will reduce the microcontroller

tasks with upper and lower thresholds. The device includes a circuit for an internal oscillator, a current source, voltage reference,

and internal nonvolatile memory (NVM) to store trimming information.

The UV light sensor has to be operated independently from Ambient Light Sensor. To enable the reading of UV sensor, UVS_MODE

and LS_EN bit has to be correctly set in the MAIN_CTRL register. Setting the UVS_MODE bit will stop a running ALS measurement

and start a new UV sensor reading.

Table 1 I/O Pins Configuration

Pin

Name

Type

Description

1

SCL

I

2SDA

I/O

3

VDD

Supply

Power Supply Voltage

4

INT

O

Interrupt – Open drain

5NC

No Connect

6

GND

Ground

Power supply ground. All voltages are referenced to GND

Upper Threshold

Lower Threshold

Interrupt

INT

SCL

SDA

VDD

GND

Regulator

Oscillator

Lower Threshold

ALS / UVS

ADC

ALS / UVS

Data

Control Logic

Upper Threshold