STW81100

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Table of contents

1

Features .............................................................................................................................................1

2

Description .........................................................................................................................................1

3

Applications ........................................................................................................................................1

4

Electrical Characteristcs.....................................................................................................................5

5

Typical Performance Characteristics..................................................................................................9

6

General Description..........................................................................................................................11

7

Circuit Description ............................................................................................................................11

7.1

Reference input stage ............................................................................................................11

7.2

Reference Divider ..................................................................................................................11

7.3

Prescaler ................................................................................................................................11

7.4

A and B Counters...................................................................................................................11

7.5

Phase frequency detector (PFD)............................................................................................12

7.6

Lock Detect ............................................................................................................................13

7.7

Charge Pump .........................................................................................................................13

7.8

Voltage Controlled Oscillators................................................................................................14

7.8.1 VCO Selection..................................................................................................................14

7.8.2 VCO Frequency Calibration .............................................................................................14

7.8.3 VCO Voltage Amplitude Control.......................................................................................15

8I2C bus interface...............................................................................................................................15

8.1

General Features ...................................................................................................................15

8.1.1 Power ON Reset ..............................................................................................................15

8.1.2 Data Validity .....................................................................................................................15

8.1.3 START condition ..............................................................................................................15

8.1.4 STOP condition ................................................................................................................16

8.1.5 Byte format and acknowledge ..........................................................................................16

8.1.6 Device addressing ............................................................................................................16

8.1.7 Single-byte write mode .....................................................................................................16

8.1.8 Multi-byte write mode .......................................................................................................17

8.1.9 Current Byte Address Read .............................................................................................17

8.2

Timing Specification ...............................................................................................................17

8.3

9

Application Information.....................................................................................................................21

9.1

Direct output...........................................................................................................................21

9.2

Divided by 2 output ................................................................................................................23

9.3

Divided by 4 output ................................................................................................................24

9.4

Evaluation Kit .........................................................................................................................25

10

Application diagram..........................................................................................................................26

11

Package Information ........................................................................................................................27

12

Revision History ...............................................................................................................................28