Datasheet AD8231 (Analog Devices) - 8

AD8231 Data Sheet PIN CONFIGURATION AND FUNCTION DESCRIPTIONS PIN 1 A2 A1 A0 CS INDICATOR 16 15 14 13 NC 1 12 +VS (IN-AMP –IN) –INA 2 11 –V AD8231 S (IN-AMP +IN) +INA 3 TOP VIEW 10 OUTA (IN-AMP OUT) (Not to Scale) NC 4 9 REF 5 6 7 8 TB SDN NB +INB –I U T) O U MP O P A (O NOTES 1. NC = NO CONNECT.
002
2. THE EXPOSED PAD CAN BE CONNECTED TO THE NEGATIVE SUPPLY (–VS) OR LEFT FLOATING.
06586- 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 −VS Negative Power Supply. Connect to ground in single-supply applications. 12 +VS 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 (−VS) or left floating. Rev. E | Page 8 of 24 Document Outline FEATURES APPLICATIONS FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE MAXIMUM POWER DISSIPATION ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS INSTRUMENTATION AMPLIFIER PERFORMANCE CURVES OPERATIONAL AMPLIFIER PERFORMANCE CURVES PERFORMANCE CURVES VALID FOR BOTH AMPLIFIERS THEORY OF OPERATION AMPLIFIER ARCHITECTURE GAIN SELECTION REFERENCE TERMINAL LAYOUT Power Supplies Package Considerations Thermal Pad INPUT BIAS CURRENT RETURN PATH INPUT PROTECTION RF INTERFERENCE COMMON-MODE INPUT VOLTAGE RANGE REDUCING NOISE APPLICATIONS INFORMATION DIFFERENTIAL OUTPUT MULTIPLEXING USING THE AD8231 WITH BIPOLAR SUPPLIES SALLEN KEY FILTER OUTLINE DIMENSIONS ORDERING GUIDE AUTOMOTIVE PRODUCTS