Datasheet

AD9271
Rev. B | Page 47 of 60
06304-088
CW
CW
V-
V+TRIM/NC
AD9271BSVZ-50
CLK+ CLK- CSB
CWD0+
CWD0-
CWD1+
CWD1-
CWD2+
CWD2-
CWD3+
CWD3-
CWD4+
CWD4-
CWD5+
CWD5-
CWVDDDOUTC+
DOUTD+
DOU T F+
DOUTG+
DOUTH+
DOUTC-
DOUTD-
DOU T F-
DOUTG-
DOUTH-
DCO+
DCO-
DOUTA+
DOU T A-
DOUTB+
DOUTB-
DOUTE+
DOUTE-
DRVDD
FCO+
FCO-
GAIN+
GAIN-
LGA LGB LGC
LGDLGE
LGF LGG LGH
LIA LIB LIC
LIDLIE
LIF LIG LIH
LO-A LO-B LO-C
LO-D
LO-E
LO-F LO-G LO-H
LOSWA LOSWB LOSWC
LOSWD
LOSWE
LOSWF LOSWG LOSWH
PAD
PDWN
RAVDD
RBIAS
REFB
REFT
SCLK SDIO
SENSE
STDBY
VREF
AVDD AVDD AVDD AVDD AVDD
AVDD
AVDD AVDD
AVDD
AVDD
DRVDD
AVDD AVDD
AVDD
AVDD AVDDAVDD
AVDD AVDD
GAIN DRIVE INPUT
Vref Selec t
Vref=0.5V(1+R313/R312)
Vref = External
Vref=1V
Remove C307 when
using external Vref
Reference Circuitry
26
54 60 66 72 55 61 67 73 53
79
78
81
80
83
82
94
93
96
95
98
97
84
46
44
42
40
34
32
30
28
45
43
41
39
33
31
29
27
36
35
47
50
38
37
86
85
56 62 68 74 57 63 69 75 59 65 71
77
99
58 64 70
76
49
92
91
88
87
51 52
90
48
89
100
101
2
13
U302
ADR510ARTZ
8.06K R335
R325
1K
2 1
P303
1K R309
R337
0-DNP
C301
0.1UF
C305
0.1UF
VREF_DUT
470K
R308
4.7UF
C302
0.1UF
C308
R338 10K
1K R326
R302
49.9
R304
00
R331
GGND
R319
1K
0.1UF
C303 C304
0.1UF
C309
0.1UF
1 2
P302
VSENSE_DUT
R313
DNP
AVDD
R317
0
DNP
R312
R311
0-DNP
AVDD
10K
R310
R336
10K
R303
100
SCLK_DUT CSB_DUT
J301
AVDD
AVDD
R301
10K
AVDD
IN
DRVDD_DUT
LOSWE
AVDD_3.3V
LOSWD
AVDD
LO-D
CWD0-
CWD1+
CWD1-
CWD0+
CWD2+
CWD2-
VSENSE_DUT
VREF_DUT
CWD5+
LO-E
CWD4-
CWD4+
CWD5-
CWD3+
CWD3-
AVDD
10 16 22
4 3 9
15 21 24 23 25
2 8
14 20
1 7
13 19
5
11 17
6
12 18
U301
LGF CLK
LIE
LGE
LIF
LOSWF
LO-F
LIG
LGG
LO-G
LOSWG
CLK
LIH
LGH
LOSWH
LO-H
AVDD AVDD AVDD AVDD AVDD
CHH
CHH
CHF
CHG
CHG
DCO
DCO
FCO
CHE
CHE
CHF
CHB
CHA
CHA
DRVDD_DUT
CHC
CHC
CHB
CHD
CHD
FCO
AVDD
LGA LO-A LIA LOSWA LO-B LGC LIB LOSWB LGB LGD LID LO-C LIC LOSWC
SDIO_DUT
AVDD AVDD AVDD
R315
0-DNP
0-DNP
R316
0.1UF
C306
1UF C307
Figure 77. Evaluation Board Schematic, DUT, VREF, and Gain Circuitry