BTM521 datasheet(3/21 Pages) BUDDIES

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BTM521 DATASHEET

CONTENT

INTRODUCTION................................................................................................................................. 4

1.1

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

1.2

FEATURES ............................................................................................................................................ 5

1.3

APPLICATIONS ..................................................................................................................................... 6

GENERAL SPECIFICATION ............................................................................................................ 7

PHYSICAL CHARACTERISTIC....................................................................................................... 8

3.1

Pin Description.................................................................................................................................... 9

REFERENCE SCHEMATIC ............................................................................................................ 12

PHYSICAL INTERFACE…………………………………………………………………………..13

5.1

POWER SUPPLY ................................................................................................................................... .13

5.2

AUDIO

INTERFACES.......................................................................................................................................................13

5.2.1

ADC ........................................................................................................................................... 13

5.2.2

ADC Sample Rate Selection and Warping................................................................................ 14

5.2.3

ADC Gain................................................................................................................................... 14

5.2.4

DAC ........................................................................................................................................... 14

5.2.5

DAC Sample Rate Selection and Warping................................................................................ 14

5.2.6

DAC Gain................................................................................................................................... 14

5.2.7

Mono Operation ......................................................................................................................... 14

5.2.8

Audio Input Stage....................................................................................................................... 15

5.2.9

Microphone Input ...................................................................................................................... ..15

5.2.10

Audio Output Stage .................................................................................................................... 15

5.3

RF INTERFACE .................................................................................................................................... 15

5.4

GENERAL PURPOSE ANALOG IO ......................................................................................................... 15

5.5

GENERAL PURPOSE DIGITAL IO.......................................................................................................... 15

5.6

SERIAL INTERFACES............................................................................................................................ 16

5.6.1

UART......................................................................................................................................... 16

5.6.2

SPI .............................................................................................................................................. 16

ELECTRICAL CHARACTERISTIC ............................................................................................... 17

6.1

ABSOLUTE MAXIMUM RATING ........................................................................................................... 17

6.2

RECOMMENDED OPERATING CONDITIONS .......................................................................................... 17

6.3

INPUT/OUTPUT TERMINAL CHARACTERISTICS .................................................................................... 17

6.3.1

Digital Terminals........................................................................................................................ 17

6.3.2

Internal CODEC - Analogue to Digital Converter .....................................................................18

6.3.3

Internal CODEC - Digital to Analogue Converter .....................................................................18

6.3.4

Microphone Input ....................................................................................................................... 19

6.3.5

Speaker Output ........................................................................................................................... 19

6.4

POWER CONSUMPTIONS....................................................................................................................... 19

RECOMMENDED TEMPERATURE REFLOW PROFILE......................................................... 20

PACKAGING INFORMATION ....................................................................................................... 21

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