Datasheet

AD8231
Rev. B | Page 8 of 24
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
PIN 1
INDICATOR
1NC
2(IN-AMP –IN) –INA
3(IN-AMP +IN) +INA
4NC
11 –V
S
12 +V
S
10 OUTA (IN-AMP OUT)
9REF
5
SDN
6
+INB
7
–INB
8
(OP AMP OUT) OUTB
15
A1
16
A2
14
A0
13
C
S
TOP VIEW
(Not to Scale)
AD8231
NOTES
1. NC = NO CONNECT.
2. THE EXPOSED PAD CAN BE CONNECTED TO THE NEGATIVE
SUPPLY (–V
S
) OR LEFT FLOATING.
06586-002
Figure 2. Pin Configuration
Table 6. Pin Function Descriptions
Pin Number Mnemonic Description
1 NC No Connect.
2 −INA (IN-AMP −IN) Instrumentation Amplifier Negative Input.
3 +INA (IN-AMP +IN) Instrumentation Amplifier Positive Input.
4 NC No Connect.
5
SDN
Shutdown.
6 +INB Operational Amplifier Positive Input.
7 −INB Operational Amplifier Negative Input.
8 OUTB (OP AMP OUT) Operational Amplifier Output.
9 REF
Instrumentation Amplifier Reference Pin. It should be driven with a low impedance. Output is
referred to this pin.
10 OUTA (IN-AMP OUT) Instrumentation Amplifier Output.
11 −V
S
Negative Power Supply. Connect to ground in single-supply applications.
12 +V
S
Positive Power Supply.
13
CS
Chip Select. Enables digital logic interface.
14 A0 Gain Setting Bit (LSB).
15 A1 Gain Setting Bit.
16 A2 Gain Setting Bit (MSB).
EPAD Exposed Pad. Can be connected to the negative supply (−V
S
) or left floating.