AD9257 Analog Devices, AD9257 Datasheet - Page 33

• Manufacturer Part Number: AD9257
• Description: Octal, 14-Bit, 40/65 MSPS Serial LVDS 1.8 V A/D Converter
• Manufacturer: Analog Devices

Data Sheet
Reg.
Addr.
(Hex)
0x19
0x1A
0x1B
0x1C
0x21
0x22
0x100
0x101
0x102
0x109
Register Name
USER_PATT1_LSB
(global)
USER_PATT1_MSB
(global)
USER_PATT2_LSB
(global)
USER_PATT2_MSB
(global)
Serial control
(global)
Serial channel
status (local)
Resolution/
sample rate
override
User I/O Control 2
User I/O Control 3
Sync
Bit 7
(MSB)
B7
B15
B7
B15
LVDS
output
LSB first
Open
Open
Open
Open
Open
Bit 6
B6
B14
B6
B14
Open
Resolution/
sample-rate
override
enable
Open
Open
Open
Word-wise DDR, 1-lane, Bits[6:4]
100 = DDR 1-lane
Bit 5
B5
B13
B5
B13
Open
Open
Open
Open
01 = 14 bits
10 = 12 bits
Resolution
Rev. 0 | Page 33 of 40
B4
B12
B4
B12
Bit 4
Open
Open
Open
Open
Bit 3
B3
B11
B3
B11
Open
Open
Open
Open
VCM
power-
down
Open
Bit 2
B2
B10
B2
B10
Open
Open
Open
Open
Open
000 = 20 MSPS
001 = 40 MSPS
010 = 50 MSPS
011 = 65 MSPS
Sample rate
Bit 1
B1
B9
B1
B9
Channel
output
reset
Open
Open
Sync
next
only
Serial output number
01 = 14 bits
10 = 12 bits
of bits
Bit 0 (LSB)
B0
B8
B0
B8
Channel
power-
down
SDIO pull-
down
Open
Enable sync
Default
Value
(Hex)
0x00
0x00
0x00
0x00
0x41
0x00
0x00
0x00
0x00
0x00
AD9257
Comments
User Defined
Pattern 1 LSB.
User Defined
Pattern 1 MSB.
User Defined
Pattern 2 LSB.
User Defined
Pattern 2 MSB.
Serial stream
control.
Default causes
MSB first and
the native bit
stream.
Used to power
down
individual
sections of
a converter.
Resolution/
sample rate
override
(requires
transfer bit,
0xFF).
Disables SDIO
pull-down.
VCM control.