Datasheet
Table Of Contents
- FEATURES
- APPLICATIONS
- FUNCTIONAL BLOCK DIAGRAM
- PRODUCT HIGHLIGHTS
- TABLE OF CONTENTS
- REVISION HISTORY
- GENERAL DESCRIPTION
- SPECIFICATIONS
- ADC DC SPECIFICATIONS—AD9640ABCPZ-80, AD9640BCPZ80, AD9640ABCPZ-105, AND AD9640BCPZ-105
- ADC DC SPECIFICATIONS—AD9640ABCPZ-125, AD9640BCPZ125, AD9640ABCPZ-150, AND AD9640BCPZ150
- ADC AC SPECIFICATIONS—AD9640ABCPZ-80, AD9640BCPZ80, AD9640ABCPZ-105, AND AD9640BCPZ-105
- ADC AC SPECIFICATIONS—AD9640ABCPZ-125, AD9640BCPZ125, AD9640ABCPZ-150, AND AD9640BCPZ 150
- DIGITAL SPECIFICATIONS
- SWITCHING SPECIFICATIONS—AD9640ABCPZ-80, AD9640BCPZ-80, AD9640ABCPZ-105, AND AD9640BCPZ105
- SWITCHING SPECIFICATIONS—AD9640ABCPZ-125, AD9640BCPZ-125, AD9640ABCPZ-150, AND AD9640BCPZ150
- TIMING SPECIFICATIONS
- ABSOLUTE MAXIMUM RATINGS
- PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS
- EQUIVALENT CIRCUITS
- TYPICAL PERFORMANCE CHARACTERISTICS
- THEORY OF OPERATION
- ADC OVERRANGE AND GAIN CONTROL
- SIGNAL MONITOR
- BUILT-IN SELF-TEST (BIST) AND OUTPUT TEST
- CHANNEL/CHIP SYNCHRONIZATION
- SERIAL PORT INTERFACE (SPI)
- MEMORY MAP
- READING THE MEMORY MAP TABLE
- EXTERNAL MEMORY MAP
- MEMORY MAP REGISTER DESCRIPTION
- Sync Control (Register 0x100)
- Fast Detect Control (Register 0x104)
- Fine Upper Threshold (Register 0x106 and Register 0x107)
- Fine Lower Threshold (Register 0x108 and Register 0x109)
- Signal Monitor DC Correction Control (Register 0x10C)
- Signal Monitor DC Value Channel A (Register 0x10D and Register 0x10E)
- Signal Monitor DC Value Channel B (Register 0x10F and Register 0x110)
- Signal Monitor SPORT Control (Register 0x111)
- Signal Monitor Control (Register 0x112)
- Signal Monitor Period (Register 0x113 to Register 0x115)
- Signal Monitor Result Channel A (Register 0x116 to Register 0x118)
- Signal Monitor Result Channel B (Register 0x119 to Register 0x11B)
- APPLICATIONS INFORMATION
- OUTLINE DIMENSIONS
AD9640
Rev. B | Page 39 of 52
CHANNEL/CHIP SYNCHRONIZATION
The AD9640 has a SYNC input that allows the user flexible
synchronization options for synchronizing the internal blocks.
The clock divider sync feature is useful to guarantee synchronized
sample clocks across multiple ADCs. The signal monitor block
can also be synchronized using the SYNC input allowing properties
of the input signal to be measured during a specific time period.
The input clock divider can be enabled to synchronize on a single
occurrence of the sync signal or on every occurrence. The signal
monitor block is synchronized on every SYNC input signal.
The SYNC input is internally synchronized to the sample clock;
however, to ensure there is no timing uncertainty between multiple
parts, the SYNC input signal should be externally synchronized to
the input clock signal, meeting the setup and hold times shown
in Table 8. The SYNC input should be driven using a single-
ended CMOS-type signal.