Datasheet
7
8
9
10
11
12
24
23
22
21
20
19
13
14
15
16
17
18
6
5
4
3
2
1
R7 20Ω
1200pF
C6
R4 20Ω
1200pF
C3
R5 20Ω
1200pF
C4
10 F
REF
REFGND
AL_PD
1 F
DVDD
DGND
0.1 F
C11
C12 C13
50Ω
DOUT
NC
AIN3
AIN2
AIN1
AIN0
NC
NC
AINGND
NC
AGND
AGND
AVDD
NC
HVDD
HVSS
SCLK
DIN
CS
R6 20Ω
1 F
1 F
C15 C14
0.1 F 1 F
C9 C10
R1
1200pF
C5
Common Analog/Digital Ground Plane
ADS8634
Analog Signal Common
Analog Input Signals
Bipolar Power Supply
Digital Signals From/To Host
Digital
To/From
Host
Digital
Supply
Reference
Analog
Supply
ADS8634
ADS8638
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SBAS541A –MAY 2011– REVISED AUGUST 2011
There is a 50Ω source series termination resistor shown on the DOUT signal. This resistor must be placed as
close to DOUT as possible. Series terminations for SCLK and CS must be placed close to the host.
Figure 96. Reccomended Schematic for the ADS8634
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Product Folder Link(s): ADS8634 ADS8638