AD9020 Analog Devices, Inc., AD9020 Datasheet - Page 12

• Manufacturer Part Number: AD9020
• Description: 10-bit 60 Msps A/d Converter
• Manufacturer: Analog Devices, Inc.

AD9020
AD9020/PCB EVALUATION BOARD
The AD9020/PCB Evaluation Board is available from the fac-
tory and is shown here in block diagram form. The board in-
cludes a reference circuit that allows the user to adjust both
references and the quarter-point voltages. The AD9617 is in-
cluded as the drive amplifier, and the user can configure the
gain from –1 to –15.
WAVEFORM
TO ERROR
BUFFERED
ANALOG
CIRCUIT
INPUT
68-Leaded Ceramic Chip Carrier
50
200
AD9617
(Z-68)
400
U5
REFERENCE
24
CIRCUIT
AD9020/PCB Evaluation Board Block Diagram
J2
ANALOG
INPUT
DUT
Dimensions shown in inches and (mm).
OUTLINE DIMENSIONS
+V
+V
1/2
1/4
–V
3/4
–V
ANALOG
INPUT
–V
–
REF
SENSE
SENSE
5V
REF
REF
REF
REF
S
+V
+
5V
S
–12–
AD9020
GND
DUT
On-board reconstruction of the digital data is provided through
the AD9713, a 12-bit monolithic DAC. The analog and recon-
structed waveforms can be summed on the board to allow the
user to observe the linearity of the AD9020 and the effects of
the quarterpoint voltages. The digital data and an adjustable
Data Ready signal are available through a 37-pin edge connector.
LSBs INVERT
MSB INVERT
OVERFLOW
(LSB) D
(MSB) D
ENCODE
D
D
D
D
D
D
D
D
1
2
3
4
5
6
7
8
0
9
D
D
D
D
D
D
D
D
D
D
D
Leadless Chip Carrier (LCC)
TTL CLK
LATCHES
+ 5V
TTL
CLK
Q
68-Terminal
AD9713 DAC
(E-68A)
D
CIRCUIT
TIMING
I
OUT
50
CONNECTOR
DAC
OUTPUT
OUT
READY
DATA
DATA
WAVEFORM
TO ERROR
CIRCUIT
REV. A