AS7421 datasheet(3/53 Pages) AMSCO

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AS7421

General Description

Datasheet

• PUBLIC

DS000667

• v1-00 • 2022-Aug-25

│ 2

Content Guide

General Description ...................... 3

1.1

Key Benefits & Features............................... 3

1.2

Applications .................................................. 4

1.3

Block Diagram .............................................. 4

Ordering Information .................... 5

Pin Assignment ............................. 6

3.1

Pin Diagram.................................................. 6

3.2

Pin Description ............................................. 6

Absolute Maximum Ratings ......... 8

Electrical Characteristics.............. 9

Typical Operating

Characteristics ............................ 14

Functional Description................ 16

7.1

Device Architecture .................................... 17

7.2

Sensor Array............................................... 18

7.3

SMUX Configuration................................... 18

7.4

ADC Gain Configuration............................. 18

7.5

Typical Measurement Cycle ....................... 19

7.6

LED Driver .................................................. 20

Device and System Calibration .. 21

I²C Interface .................................. 23

9.1

I²C Address.................................................23

9.2

I²C Write Transaction..................................23

9.3

I²C Read Transaction .................................24

9.4

Timing Characteristics ................................24

9.5

Timing Diagrams ........................................25

10.1

10.2

Detailed Register Description .....................31

Package Drawings & Markings... 45

11.1

Package Drawings......................................45

Tape & Reel Information.............. 48

Soldering & Storage Information 50

Revision Information ................... 51

Legal Information......................... 52

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