VIN
50Ω
ADT2-1
4.7µF
+
+VA
(5V)
0.1µF
0.1µF
22Ω
22Ω
4.7µF
4.7µF
+
+
22pF
0.1µF
0.1µF
0.1µF
0.1µF
10µF
+
64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49
1
2
3
4
5
6
7
8
9
+VSA
GND 48
GND 47
VREF 46
0.1µF
0.1µF
+VSA
+VSD
+VSD
+VSD
+VSD
GND
GND
CLK
0.01µF
0.1µF
SEL1 45
SEL2 44
GND 43
GND 42
BTC 41
+VD
(5V)
10µF
RS 0.1µF
CLKIN
ADT2-1
ADS5421
PD 40
10 CLK
OE 39
50Ω
11 GND
12 GND
13 GNDRV
14 GNDRV
15 DNC
16 DV
GNDRV 38
GNDRV 37
GNDRV 36
VDRV 35
VDRV 34
VDRV 33
0.01µF
0.1µF
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
DV
10µF
+
0.1µF
+VDR
(3.3V)
FIGURE 15. Basic Application Circuit of the ADS5421 Includes Recommended Supply and Reference Bypassing.
ADS5421
SBAS237D
17
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