SNAD01B

8-CHANNEL 8-BIT ADC

======== CONTENTS ========

1.

GENERAL DESCRIPTION.......................................................................................................................................3

2.

FEATURES....................................................................................................................................................................3

3.

APPLICATIONS ..........................................................................................................................................................3

4.

BLOCK DIAGRAM.....................................................................................................................................................4

5.

PIN ASSIGNMENT......................................................................................................................................................4

6.

FUNCTIONAL DESCRIPTIONS .............................................................................................................................5

INTERFACE FORMAT.............................................................................................................................................................5

CHANNEL SETTING...............................................................................................................................................................7

CONTROL REGISTER SETTING..............................................................................................................................................7

ADC READ TIMING..............................................................................................................................................................8

TIMING OF DIGITAL INPUT READING...................................................................................................................................9

POWER DOWN & CHANNEL WAKE-UP.............................................................................................................................10

BANDGAP REFERENCE........................................................................................................................................................11

INPUT CHANNEL PAD (CHANNEL 0~6) ............................................................................................................................12

BATTERY MONITORING (CHANNEL 7 ONLY) ....................................................................................................................13

7.

ELECTRICAL CHARACTERISTICS ..................................................................................................................14

8.

APPLICATION CIRCUITS.....................................................................................................................................15

EXAMPLE CIRCUIT: SNAD01B WORKS WITH SONIX 4-BIT SERIES CONTROLLER..........................................................15

9.

EXAMPLE PROGRAMS:........................................................................................................................................16

PROGRAM 1: SET CONFIGURATION OF SNAD01B..........................................................................................................27

PROGRAM 2: READ ADC RESULT FROM CHANNEL 1 ......................................................................................................27

PROGRAM 3: READ DIGITAL INPUT DATA FROM CH4, CH3, CH2 ..................................................................................28

PROGRAM 4: POWER-DOWN SNAD01B AND HOST, AND WAKE-UP ..............................................................................28

PROGRAM 5: BATTERY LOW DETECTION .........................................................................................................................29

10.

PAD DIAGRAM...................................................................................................................................30

Version: 1.3

July 31, 2003

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