AD9228
POPULATE L301-L308 WITH 0ꢀ
RESISTORS OR DESIGN YOUR
OWN FILTER.
R301
DNP
R302
DNP
EXTERNAL VARIABLE GAIN DRIVE
VG
C302
DNP
C301
DNP
VARIABLE GAIN CIRCUIT
L301
0ꢀ
L302 L303
L304
0ꢀ
(0-1.0V DC)
VG
0ꢀ
0ꢀ
GND
CW
AVDD_5V
C303
C304
L307
0ꢀ
L306
0ꢀ
L305 DNP
DNP L308
R320
39kꢀ
R319
10kꢀ
0ꢀ
0ꢀ
R303
DNP
R304
DNP
C305
0.1µF
C306 C307
0.1µF 0.1µF
C308
0.1µF
R306
374ꢀ
R305
374ꢀ
R311
C309
1000pF
10kꢀ
DNP
C310
0.1µF
R307
187ꢀ
R308
187ꢀ
R309
187ꢀ
R310
187ꢀ
R312
10kꢀ
U301
25
R313
10kꢀ
DNP
R314
ENBV
ENBL
HILO
VCM1
VIN1
VIP1
COM1
LOP1
RCLMP
16
26
27
28
29
30
31
32
10kꢀ
VG
GAIN
MODE
VCM2
VIN2
VIP2
COM2
LOP2
15
14
13
12
11
10
9
DNP
AD8332
C311
0.1µF
C313
0.1µF
C312
0.1µF
C314
0.1µF
R316
C320
0.1µF
R317
274ꢀ
C321
0.1µF
274ꢀ
R315 C315
10kꢀ 10µF
C316
0.1µF
C325
0.1µF
C326
10µF
R318
10kꢀ
C317
0.018µF
C322
0.018µF
C318
22pF
C323
22pF
L309
120nH
L310
120nH
C319
0.1µF
C324
0.1µF
DNP: DO NOT POPULATE
INH4
INH3
Figure 74. Evaluation Board Schematic, Optional DUT Analog Input Drive
Rev. 0 | Page ꢁ0 of 52
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