AS7331 datasheet(64/72 Pages) OSRAM

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AS7331

Application Information

Datasheet

• PUBLIC

DS001047

• v4-00 • 2023-Mar-24

│ 63

Application Information

9.1

Schematic

Figure 58 shows a typical application circuit. Digital and analog grounds should be routed separately

onto the printed circuit board and must be connected near the device.

Figure 58:

Typical Application Circuit

12 11 10

SYN

VSSA

SCL

VSSA

VDDD 3.3 V

100 nF

0 Ω

3.3 MΩ

100 nF

VDDA 3.3 V

SCL

SDA

DIN0

DIN1

Controller

VDDD

VSSD

SYN

READY

820

100 nF

REXT

A B

AS7331

Please make sure all the specified components within the application circuit work according to their

operating range and the parameters in the datasheet. For example, voltage regulators (workspace

load current, separated analog and digital, or decoupled power supplies based on a common

regulator) need special treatment to avoid noise or deviations during operation.

9.2

External Components

The AS7331 and its external components for references and/or power supply (e.g. reference resistor,

REXT) should be placed on the same PCB side.

9.3

PCB Layout

The analog supply must be placed as close as possible to the AS7331. The connection between the

analog and digital grounds must be beneath (LP level) and/or near the AS7331.

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