AD6657ABBCZ AD [Analog Devices], AD6657ABBCZ Datasheet - Page 32

• Manufacturer Part Number: AD6657ABBCZ
• Description: Quad IF Receiver
• Manufacturer: AD [Analog Devices]

Addr.
(Hex)
0x0D
0x0E
0x10
0x14
0x15
0x16
0x17
0x18
AD6657A
Register
Name
Test mode
(local)
BIST enable
(local)
Offset adjust
(local)
Output mode
(local)
Output
adjust
(local)
Clock phase
control
(local)
DCO output
delay
(local)
V
(global)
REF
select
(MSB)
Bit 7
Open
Open
Open
Open
Open
Invert
DCO clock
0 = off
1 = on
DCO
delay
enable
0 = off
1 = on
Open
Bit 6
Open
Open
Open
Open
Open
Open
Open
Open
Bit 5
Reset
long PN
generator
0 = on
1 = off
(default)
Open
Open
Open
Open
Open
Open
Bit 4
Reset
short PN
generator
0 = on
1 = off
(default)
Open
Output
enable
bar
(local)
1 = off
0 = on
Open
Open
Rev. 0 | Page 32 of 36
Offset adjustment in LSBs from +127 to −128
00000 = 100 ps additional delay on the DCO pin
00001 = 200 ps additional delay on the DCO pin
00010 = 300 ps additional delay on the DCO pin
11101 = 3.0 ns additional delay on the DCO pin
11110 = 3.1 ns additional delay on the DCO pin
11111 = 3.2 ns additional delay on the DCO pin
Bit 3
Open
Open
Open
Open
(twos complement format)
Main reference full-scale V
Internal V
011111 = +31 LSB
011110 = +30 LSB
011101 = +29 LSB
100001 = −31 LSB
100000 = −32 LSB
000010 = +2 LSB
000001 = +1 LSB
111111 = −1 LSB
111110 = −2 LSB
111101 = −3 LSB
000000 = 0 LSB
Output port DCO clock delay
01111: internal 2.087 V p-p
00001: internal 1.772 V p-p
11111: internal 1.727 V p-p
10000: internal 1.383 V p-p
00000: internal 1.75 V p-p
Output port LVDS drive current
…
…
…
Bit 2
BIST reset
0 = on
1 = off
(default)
Output
invert
(local)
1 = on
0 = off
Open
REF
0001 = 3.5 mA (default)
full-scale adjustment
100 = alternating checkerboard
0000 = 3.72 mA
0011 = 2.96 mA
0100 = 2.82 mA
0101 = 2.57 mA
0110 = 2.27 mA
…
…
…
…
000 = off (normal operation)
0010 = 3.3 mA
0111 = 2.0 mA
1000 = 2.0 mA
110 = PN sequence short
101 = PN sequence long
111 = 1/0 word toggle
001 = midscale short
Output test mode
011 = negative FS
010 = positive FS
REF
adjustment
Bit 1
Open
Open
Output format (local)
00 = offset binary
complement
01 = twos
(LSB)
Bit 0
BIST
enable
1 = on
0 = off
(default)
Open
Default
Value
(Hex)
0x00
0x00
0x00
0x00
0x01
0x00
0x00
0x00
Data Sheet
Comments
When set,
the test data
is placed on
the output
pins in place
of normal
data.
When Bit 0
is set, the
built-in self
test function
is initiated.
Device offset
trim.
Configures
the outputs
and the
format of
the data.
Output
current
adjustments.
When Bit 7
is set, clock
polarity is
reversed.
Enable DCO
delay and set
the delay
time.
Select
adjustments
for V
REF
.