AD9271 Analog Devices, AD9271 Datasheet - Page 38

• Manufacturer Part Number: AD9271
• Description: Octal LNA/VGA/AAF/ADC and Crosspoint Switch
• Manufacturer: Analog Devices

Specifications of AD9271

• Resolution (bits): 12bit
• # Chan: 8
• Sample Rate: 50MSPS
• Interface: LVDS,Ser
• Analog Input Type: SE-Uni
• Ain Range: 0.25 V p-p,0.32 V p-p,0.4 V p-p
• Adc Architecture: Pipelined
• Pkg Type: QFP

AD9271
Table 15. Memory Map Register
Addr.
(Hex)
Chip Configuration Registers
00
01
02
Device Index and Transfer Registers
04
05
FF
ADC Functions Registers
08
09
Register Name
chip_port_config
chip_id
chip_grade
device_index_2
device_index_1
device_update
modes
clock
X
X
Bit 7
(MSB)
0
X
X
X
X
1
Bit 6
LSB first
1 = on
0 = off
(default)
X
X
X
X
X
X
Child ID [5:4]
(identify device
variants of Chip ID)
00 = 50 MSPS
(default)
01 = 40 MSPS
10 = 25 MSPS
Bit 5
Soft
reset
1 = on
0 = off
(default)
X
Clock
Channel
DCO±
1 = on
0 = off
(default)
X
X
X
(AD9271 = 0x13), (default)
Rev. B | Page 38 of 60
Bit 4
1
X
Clock
Channel
FCO±
1 = on
0 = off
(default)
X
X
X
Chip ID Bits [7:0]
X
Bit 3
1
X
Data
Channel
H
1 = on
(default)
0 = off
Data
Channel
D
1 = on
(default)
0 = off
X
LNA
bypass
1 = on
0 = off
(default)
Bit 2
Soft
reset
1 = on
0 = off
(default)
X
Data
Channel
G
1 = on
(default)
0 = off
Data
Channel
C
1 = on
(default)
0 = off
X
Internal power-down mode
000 = chip run (default)
001 = full power-down
010 = standby
011 = reset
100 = CW mode (TGC PDWN)
X
Bit 1
LSB first
1 = on
0 = off
(default)
X
Data
Channel
F
1 = on
(default)
0 = off
Data
Channel
B
1 = on
(default)
0 = off
X
X
Bit 0
(LSB)
0
X
Data
Channel
E
1 = on
(default)
0 = off
Data
Channel
A
1 = on
(default)
0 = off
SW
transfer
1 = on
0 = off
(default)
Duty cycle
stabilizer
1 = on
(default)
0 = off
Default
Value
0x18
Read
only
0x00
0x0F
0x0F
0x00
0x00
0x01
Notes/
Comments
The nibbles
should be
mirrored so
that LSB- or
MSB-first mode
is set correctly
regardless of
shift mode.
Default is
unique chip ID,
different for
each device.
This is a read-
only register.
Child ID used
to differentiate
graded devices.
Bits are set to
determine
which on-chip
device receives
the next write
command.
Bits are set to
determine
which on-chip
device receives
the next write
command.
Synchronously
transfers data
from the
master shift
register to
the slave.
Determines
various generic
modes of chip
operation.
Turns the
internal duty
cycle stabilizer
on and off.