PIN DESCRIPTIONS
PIN
I/O DESIGNATOR DESCRIPTION
PIN
I/O
DESIGNATOR DESCRIPTION
1
GND
GND
+VS
Ground
34
35
36
37
38
39
40
41
42
43
44
45
O
O
O
O
O
O
A5
A4
Data Bit 5 (D7), Channel A
2
Ground
Data Bit 4 (D8), Channel A
Data Bit 3 (D9), Channel A
Data Bit 2 (D10), Channel A
Data Bit 1 (D11), Channel A
Over-Range Indicator, Channel A
Logic Driver Supply Voltage, Channel A
Ground
A3
3
+5V Supply
4
GND
+VS
Ground
A2
5
+5V Supply
A1 (MSB)
OVRA
VDRVA
GND
OEA
6
I
OEB
GND
VDRVB
OVRB
B12 (LSB)
B11
Output Enable, Channel B
GND
7
8
Logic Driver Supply Voltage, Channel B
Over-Range Indicator, Channel B
Data Bit 12 (D0), Channel B
Data Bit 11 (D1), Channel B
Data Bit 10 (D2), Channel B
Data Bit 9 (D3), Channel B
Data Bit 8 (D4), Channel B
Data Bit 7 (D5), Channel B
Data Bit 6 (D6), Channel B
Data Bit 5 (D7), Channel B
Data Bit 4 (D8), Channel B
Data Bit 3 (D9), Channel B
Data Bit 2 (D10), Channel B
Data Bit 1 (D11), Channel B
Data Valid, Channel B
Ground
I
I
Output Enable, Channel A
+5V Supply
9
O
O
O
O
O
O
O
O
O
O
O
O
O
O
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
+VS
GND
SEL
Ground
Input Range Select: HIGH = 3V, LOW = 2V
B10
B9
46
47
48
49
50
+VS
GND
GND
GND
INA
+5V Supply
Ground
Ground
B8
B7
Ground
B6
I
Analog Input, Channel A
B5
51
52
53
54
55
56
I
INA
CMA
Complementary Analog Input, Channel A
Common-Mode, Channel A
B4
O
B3
I/O
I/O
REFTA
REFBA
GND
Top Reference/Bypass, Channel A
B2
Bottom Reference/Bypass, Channel A
Ground
B1 (MSB)
DVB
GND
CLK
GND
DVA
I
INT/EXT
Reference Select: HIGH = External,
LOW = Internal 50kΩ Pull-Up Resistor
I
Clock
57
58
59
60
61
62
63
64
+VS
GND
REFBB
REFTB
CMB
+5V Supply
Ground
Ground
O
O
O
O
O
O
O
O
Data Valid, Channel A
Data Bit 12 (D0), Channel A
Data Bit 11 (D1), Channel A
Data Bit 10 (D2), Channel A
Data Bit 9 (D3), Channel A
Data Bit 8 (D4), Channel A
Data Bit 7 (D5), Channel A
Data Bit 6 (D6), Channel A
I/O
I/O
O
I
Bottom Reference/Bypass, Channel B
Top Reference/Bypass, Channel B
Common-Mode, Channel B
Complementary Analog Input, Channel B
Analog Input, Channel B
Ground
A12 (LSB)
A11
A10
INB
A9
I
INB
A8
GND
A7
A6
ADS2806
SBAS178B
5
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