Datasheet

AD9235 Data Sheet
Rev. D | Page 30 of 40
1 2 3 4 5 6
P13
P14
XFRIN1
NC
R SINGLE ENDED
R18
25Ω
EXTREF
1V MAX E1
R1
10kΩ
GND
AVDD
GND
C22
10µF
GND
C8
0.1µF
P5
P6
P11
P1
P3
P4
22
MODE
REFB
REFT
AVDD
AGND
VIN+
AGND
AVDD
VIN–
AD9235
U4
VREF
SENSE
MODE
D11
OTR
D10
D9 D8
DRVDD
DGND
D7
D5
D6
D4
D3
D2
(LSB)
DRVDD
GND
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
D6X
D5X
D4X
D2X
D3X
D1X
D0X
(MSB)
OVERRANGE BIT
AVDD
GND
DRVDD
VDL
GND
VAMP
P2
H1
MTHOLE6
3.0V 2.5V 5.0V
RP1 220Ω
R8
1kΩ
CLK
AVDD
R15
33Ω
GND
GND
OR L1
FOR FILTER
GND
AVDD
R36
1kΩ
R26
1kΩ
GND
AVDD
AVDD
GND
GND
VIN+
VIN–
C19
15pF
C21
10pF
R2
XX
R10
36Ω
R42
0Ω
R12
0Ω
X
OUT
X
OUT
AMPIN
GND
X
OUT
B
X
OUT
B
R3
0Ω
R11
36Ω
C26
10pF
E 45
C16
0.1µF
C6
0.1µF
GND
AMP
C15
0.1µF
L1
10nH
GND
PRI SEC
GND
C18
0.1µF
J1
R7
1kΩ
2.5V
SENSE PIN SOLDERABLE JUMPER
E TO A EXTERNAL VOLTAGE DIVIDER
E TO B INTERNAL 1V REFERENCE (DEFAULT)
E TO C EXTERNAL REFERENCE
E TO D INTERNAL 0.5V REFERENCE
MODE PIN SOLDERABLE JUMPER
5 TO 1 TWOS COMPLEMENT/DCS OFF
5 TO 2 TWOS COMPLEMENT/DCS OFF
5 TO 3 OFFSET BINARY/DCS ON
5 TO 4 OFFSET BINARY/DCS OFF
25
26
27
28
29
30
31
32
16
15
14
13
12
11
10
9
DNC CLK DNC DNC PDWN DNC D0 D1
1 2 3 4 5
6 7 8
24 23
22 21 20
19 18 17
GND
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
DRX
D13X
D12X
D10X
D11X
D9X
D8X
RP2 220Ω
H2
MTHOLE6
H3
MTHOLE6
H4
MTHOLE6
GND
3
R6
1kΩ
4
1
R5
1kΩ
GND
AVDDGND
D
C13
0.10µF
C
E
P8
B
P9
P10
P7
A
C29
10µF
GND
R9
10kΩ
GND
C12
0.1µF
GND
C9
0.10µF
C11
0.1µF
GND
C7
0.1µF
R4
33kΩ
AVDD
R13
1kΩ
R25
1kΩ
GND
GND
C23
10pF
C5
0.1µF
AMPINB
T1
ADT 1–1 WT
1
5
2
6
43
X FRIN
GND
PRI SEC
OPTIONAL XFR
T2
FT C1–1–13
1
2
5
43
CT
CT
R3, R17, R18
ONLY ONE SHOULD BE
ON BOARD AT A TIME
02461-054
+
D7X
Figure 54. LFCSP Evaluation Board Schematic, Analog Inputs and DUT