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 44 of 52
Addr
(Hex)
Register
Name
Bit 7
(MSB)
Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1
Bit 0
(LSB)
Default
Value
(Hex)
Default
Notes/
Comments
0x0E BIST Enable
(Local)
Open Open Open Open Open
Reset BIST
sequence
Open BIST enable 0x00
0x10 Offset Adjust
(Local)
Open Open
Offset adjust in LSBs from +31 to −32
(twos complement format)
0x00
0x14 Output Mode
Drive
strength
0 V to 3.3 V
CMOS or
ANSI
LVDS:
1 V to 1.8 V
CMOS or
reduced:
LVDS
(global)
Output type
0 = CMOS
1 = LVDS
(global)
Open
Output
enable bar
(local)
Open
Output
invert
(local)
00 = offset binary
01 = twos complement
01 = gray code
11 = offset binary
(local)
0x00
Configures the
outputs and
the format of
the data
0x16
Clock Phase
Control
(Global)
Invert DCO
clock
Open Open Open Open Input clock divider phase adjust
000 = no delay
001 = 1 input clock cycle
010 = 2 input clock cycles
011 = 3 input clock cycles
100 = 4 input clock cycles
101 = 5 input clock cycles
110 = 6 input clock cycles
0x00
Allows
selection of
clock delays
into the input
clock divider
0x17
DCO Output
Delay (Global)
Open Open Open
DCO clock delay
(delay = 2500 ps × register value/31)
00000 = 0 ps
00001 = 81 ps
00010 = 161 ps
…
11110 = 2419 ps
11111 = 2500 ps
0x00
0x18 VREF Select
(Global)
Reference voltage selection
00 = 1.25 V p-p
01 = 1.5 V p-p
10 = 1.75 V p-p
11 = 2.0 V p-p (default)
Open Open Open Open Open Open 0xC0
0x24
BIST Signature
LSB (Local)
BIST signature[7:0] 0x00 Read only
0x25
BIST Signature
MSB (Local)
BIST signature[15:8] 0x00 Read only
Digital Feature Control
0x100 Sync Control
(Global)
SM sync
enable
Open Open Open Open
Clock
divider next
sync only
Clock
divider
sync
enable
Master
sync
enable
0x00
0x104
Fast Detect
Control (Local)
Open Open Open Open Fast Detect Mode Select[2:0]
Fast detect
enable
0x00
0x106
Fine Upper
Threshold
Register 0
(Local)
Fine Upper Threshold[7:0] 0x00
0x107
Fine Upper
Threshold
Register 1
(Local)
Open Open Open Fine Upper Threshold[12:8] 0x00
0x108
Fine Lower
Threshold
Register 0
(Local)
Fine Lower Threshold[7:0] 0x00
0x109
Fine Lower
Threshold
Register 1
(Local)
Open Open Open Fine Lower Threshold[12:8] 0x00