AD9020
AD9020/PCB EVALUATION BOARD
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.
The AD9020/PCB Evaluation Board is available from the factory
and is shown here in block diagram form. The board includes a
reference circuit that allows the user to adjust both references
and the quarter-point voltages. The AD9617 is included as the
drive amplifier, and the user can configure the gain from –1 to –15.
DAC
OUT
+5V
–5V
AD9713
I
OUT
DAC
DUT
ANALOG
INPUT
–V
+V
S
GND
S
MSB
TO ERROR
+5V
BUFFERED
ANALOG
INPUT
400⍀
50⍀
D
INVERT
WAVEFORM
CIRCUIT
LSBs
INVERT
J2
200⍀
50⍀
24⍀
U5
AD9617
ANALOG
INPUT
D
D
(LSB)
0
D
D
D
D
D
D
D
D
D
D
D
1
AD9020
DUT
D
2
OUTPUT
Q
D
3
DATA
TO ERROR
WAVEFORM
CIRCUIT
D
4
COLLECTOR
+V
+V
REF
TTL
D
D
6
5
LATCHES
SENSE
DATA
READY
3/4
1/2
D
REF
7
REFERENCE
CIRCUIT
D
8
CLK
REF
REF
D
(MSB)
9
1/4
OVERFLOW
–V
SENSE
TTL CLK
–V
REF
TIMING
CIRCUIT
ENCODE
Figure 14. AD9020/PCB Evaluation Board Block Diagram
OUTLINE DIMENSIONS
Dimensions shown in inches and (mm).
68-Terminal
Leadless Chip Carrier (LCC)
(E-68A)
68-Leaded Ceramic Chip Carrier
(Z-68)
0.105؎0.013
(2.667؎0.330)
0.130 (3.301)
TYP
0.950 ؎ 0.010 SQ
(24.13 ؎ 0.254)
0.950 ؎ 0.010 SQ
(24.13 ؎ 0.254)
61
9
0.025
(0.625)
MIN
60
10
9
61
0.040
(1.016)
MIN
10
60
PIN 1
0.050
(1.27)
TYP
PIN 1
0.050
(1.27)
TYP
TOP VIEW
1.210؎0.010
(30.73؎0.254)
0.036؎0.003
(0.965 ؎0.076)
TOP VIEW
0.018؎0.002
(0.457 ؎0.05)
44
26
0.030
(0.762)
43
27
0.700؎0.005 SQ
(17.78؎0.127)
TYP
0.075؎0.008
(1.905؎0.203)
26
44
43
0.050؎0.008
(1.27؎0.076)
27
0.850؎0.009
(21.59؎0.229)
0.025 (0.625)
MIN
0.700؎0.005 SQ
(17.78؎0.127)
0.105؎0.013
(2.667؎0.330)
0.850؎0.009
(21.59؎0.229)
AD9020–Revision History
Location
Page
Data Sheet changed from REV. B to REV. C.
Edit to ABSOLUTE MAXIMUM RATINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
REV. C
–12–
ADI [ ADI ]
