AD5933

Preliminary Technical Data

Rev. PrA | Page 2 of 20

TABLE OF CONTENTS

Specifications..................................................................................... 3

Timing Characteristics..................................................................... 5

Pin Configuration and function description ................................ 6

General Description ......................................................................... 7

Output Stage.................................................................................. 7

Circuit Description....................................................................... 7

Numerical Controlled Oscillator + Phase Modulator ............. 7

SIN ROM ....................................................................................... 8

Response Stage.............................................................................. 8

ADC Operation ............................................................................ 8

DFT Conversion ........................................................................... 8

Temperature Sensor ..................................................................... 9

Register Map (Each Row equals 8 Bits of Data) ......................... 11

Control Register.......................................................................... 13

Control Register Decode: .......................................................... 14

Initialize Sensor with Start Frequency..................................... 14

Start Frequency Sweep............................................................... 14

Increment Frequency ................................................................. 14

Repeat Frequency ....................................................................... 14

Power Down................................................................................ 14

Standby Mode ............................................................................. 14

Read Temperature ...................................................................... 14

Error Checking ........................................................................... 14

RESET .......................................................................................... 14

System Clock............................................................................... 14

Output Voltage............................................................................ 14

Post Gain ..................................................................................... 14

Performing a Frequency Sweep – Flow Chart ............................ 15

Serial Bus Interface..................................................................... 15

General I2C Timing.................................................................... 15

Writing/Reading to the AD5933 .............................................. 16

Block Write.................................................................................. 17

AD5933 Read Operations ......................................................... 17

Error Correction......................................................................... 18

P.E.C. ............................................................................................ 18

Checksum.................................................................................... 18

User Command Codes .............................................................. 18

Outline Dimensions ....................................................................... 20

ESD Caution................................................................................ 20

REVISION HISTORY

12/04—Revision PrA—Preliminary Version