AD6672 Analog Devices, AD6672 Datasheet - Page 27

• Manufacturer Part Number: AD6672
• Description: IF Receiver
• Manufacturer: Analog Devices

Specifications of AD6672

• Resolution (bits): 11bit
• # Chan: 1
• Sample Rate: 250MSPS
• Interface: LVDS
• Analog Input Type: Diff-Uni
• Ain Range: 1.75 V p-p
• Adc Architecture: Pipelined
• Pkg Type: CSP

Addr
(Hex)
0x10
0x14
0x15
0x16
0x17
0x18
0x19
0x1A
0x1B
0x1C
0x1D
0x1E
0x1F
0x20
0x24
0x25
Digital Feature Control Registers
0x3C
0x3E
Register
Name
Offset adjust
Output mode
Output adjust
Clock phase
control
DCO output
delay
Input span
select
User Test
Pattern 1 LSB
User Test
Pattern 1 MSB
User Test
Pattern 2 LSB
User Test
Pattern 2 MSB
User Test
Pattern 3 LSB
User Test
Pattern 3 MSB
User Test
Pattern 4 LSB
User Test
Pattern 4 MSB
BIST signature
LSB
BIST signature
MSB
NSR control
NSR tuning
word
Bit 7
(MSB)
Open
Open
Open
Invert
DCO
clock
Enable
DCO
clock
delay
Open
Open
Open
Bit 6
Open
Open
Open
Open
Open
Open
Open
Open
Bit 5
Open
Open
Open
Open
Open
Open
equations for the tuning word are dependent on the NSR mode)
Bit 4
Output
enable bar
0 = on
1 = off
Open
Open
Open
User Test Pattern 1[15:8]
User Test Pattern 2[15:8]
User Test Pattern 3[15:8]
User Test Pattern 4[15:8]
User Test Pattern 1[7:0]
User Test Pattern 2[7:0]
User Test Pattern 3[7:0]
User Test Pattern 4[7:0]
Rev. 0 | Page 27 of 32
BIST signature[15:8]
BIST signature[7:0]
(see the Noise Shaping Requantizer section;
Offset adjust in LSBs from +31 to −32
Bit 3
(twos complement format)
Open
Open
LVDS output drive current adjust
0000 = 3.72 mA output drive current
0001 = 3.5 mA output drive current (default)
0010 = 3.30 mA output drive current
0011 = 2.96 mA output drive current
0100 = 2.82 mA output drive current
0101 = 2.57 mA output drive current
0110 = 2.27 mA output drive current
0111 = 2.0 mA output drive current (reduced range)
1000 to 1111 = reserved
[delay = (3100 ps × register value/31 +100)]
NSR mode
000 = 22% bandwidth mode
001 = 33% bandwidth mode
NSR tuning word
DCO clock delay
00000 = 100 ps
00001 = 200 ps
00010 = 300 ps
…
11110 = 3100 ps
11111 = 3200 ps
Full-scale input voltage selection
01111 = 2.087 V p-p
…
00001 = 1.772 V p-p
00000 = 1.75 V p-p (default)
11111 = 1.727 V p-p
…
10000 = 1.383 V p-p
Bit 2
Output
invert
0 = normal
(default)
1 =
inverted
Open
Bit 1
Open
Output format
00 = offset binary
01 = twos complement
(default)
10 = gray code
11 = reserved
Bit 0
(LSB)
Open
NSR
enable
0 = off
1 = on
0x01
0x01
0x00
0x00
0x00
Default
Value
(Hex)
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x1C
AD6672
Default
Notes/
Comments
Configures
the
outputs
and the
format of
the data.
Full-scale
input
adjustment
in 0.022 V
steps.
Read only.
Read only.
NSR
controls.
NSR fre-
quency
tuning
word.