AD9642 Analog Devices, AD9642 Datasheet - Page 26

• Manufacturer Part Number: AD9642
• Description: 14-Bit, 170 MSPS/210 MSPS/250 MSPS, 1.8 V Analog-to-Digital Converter (ADC)
• Manufacturer: Analog Devices

Specifications of AD9642

• Resolution (bits): 14bit
• # Chan: 1
• Sample Rate: 250MSPS
• Interface: LVDS
• Analog Input Type: Diff-Bip,Diff-Uni
• Ain Range: 1.75 V p-p
• Adc Architecture: Pipelined
• Pkg Type: CSP

AD9642
Addr
(Hex)
0x0E
0x10
0x14
0x15
0x16
0x17
0x18
0x19
0x1A
0x1B
0x1C
0x1D
0x1E
0x1F
0x20
0x24
0x25
Register
Name
BIST enable
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
Bit 7
(MSB)
Open
Open
Open
Open
Invert
DCO clock
Enable
DCO
clock
delay
Open
Bit 6
Open
Open
Open
Open
Open
Open
Open
Bit 5
Open
Open
Open
Open
Open
Open
Bit 4
Open
Output
enable bar
0 = on
(default)
1 = off
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 26 of 28
BIST signature[15:8]
BIST signature[7:0]
Offset adjust in LSBs from +31 to −32
Bit 3
Open
Open
Open
(twos complement format)
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)]
00000 = 100 ps
DCO clock delay
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
Reset BIST
sequence
Output
invert
0 = normal
(default)
1 = inverted
Open
Bit 1
Open
Open
Output format
00 = offset binary
01 = twos complement
(default)
10 = gray code
11 = reserved
Bit 0
(LSB)
BIST enable
Open
Default
Value
(Hex)
0x00
0x00
0x01
0x01
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
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.