Datasheet

ADS5421
17
SBAS237E
www.ti.com
FIGURE 15. Basic Application Circuit of the ADS5421 Includes Recommended Supply and Reference Bypassing.
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
GND
GND
V
REF
SEL1
SEL2
GND
GND
BTC
PD
OE
GNDRV
GNDRV
GNDRV
VDRV
VDRV
VDRV
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
+V
SA
+V
SA
+V
SD
+V
SD
+V
SD
+V
SD
GND
GND
CLK
CLK
GND
GND
GNDRV
GNDRV
DNC
DV
+V
SA
+V
SA
GND
REFBY
GND
IN
GND
IN
GND GND GND GND
REFT
CM
REFB
GND
B1 B2 B3 B4 B5 B6 B7 B8 B9 B10 B11 B12 B13 B14 NC NC
DO
D1 D2 D3 D4 D5 D6 D7 D8 D9
D10 D11 D12 D13
NC NC
64 63 62 61 60 59 58 57 56 55 54
17 18 19 20 21 22 23 24 25 26 27
53 52 51 50 49
28 29 30 31 32
ADS5421
DV
0.1µF
0.01µF
0.1µF
0.1µF
10µF
+
0.1µF
10µF
0.01µF
0.1µF
+
0.1µF
50Ω
0.1µFR
S
ADT2-1
+V
A
(5V)
+V
DR
(3.3V)
50Ω
22Ω22Ω
4.7µF
0.1µF
4.7µF
0.1µF
+
4.7µF
0.1µF
+
+
0.1µF 0.1µF
V
IN
CLK
IN
ADT2-1
22pF
10µF
+V
D
(5V)