Datasheet AD8231 (Analog Devices) - 5

Data Sheet AD8231
VS = 3.0 V, VREF = 1.5 V, TA = 25°C, G = 1, RL = 10 kΩ, unless otherwise noted.
Table 3. Parameter Conditions Min Typ Max Unit
INSTRUMENTATION AMPLIFIER Offset Voltage VOS RTI = VOSI + VOSO/G Input Offset, VOSI 4 15 µV Average Temperature Drift 0.01 0.05 µV/°C Output Offset, VOSO 15 30 µV Average Temperature Drift 0.05 0.5 µV/°C Input Currents Input Bias Current 250 500 pA TA = −40°C to +125°C 5 nA Input Offset Current 20 100 pA TA = −40°C to +125°C 0.5 nA Gains 1, 2, 4, 8, 16, 32, 64, or 128 Gain Error G = 1 0.05 % G = 2 to 128 0.8 % Gain Drift TA = −40°C to +125°C G = 1 to 32 3 10 ppm/°C G = 64 4 20 ppm/°C G = 128 10 30 ppm/°C CMRR G = 1 80 dB G = 2 86 dB G = 4 92 dB G = 8 98 dB G = 16 104 dB G = 32 110 dB G = 64 110 dB G = 128 110 dB Noise e 2 n = √(eni + (eno/G)2) VIN+, VIN− = 2.5 V, TA = 25°C Input Voltage Noise, eni f = 1 kHz 40 nV/√Hz f = 1 kHz, TA = −40°C 35 nV/√Hz f = 1 kHz, TA = 125°C 48 nV/√Hz f = 0.1 Hz to 10 Hz 0.8 µV p-p Output Voltage Noise, eno f = 1 kHz 72 nV/√Hz f = 1 kHz, TA = −40°C 62 nV/√Hz f = 1 kHz, TA = 125°C 83 nV/√Hz f = 0.1 Hz to 10 Hz 1.4 µV p-p Current Noise f = 10 Hz 20 fA/√Hz Other Input Characteristics Common-Mode Input Impedance 10||5 GΩ||pF Power Supply Rejection Ratio 100 115 dB Input Operating Voltage Range 0.05 2.95 V Reference Input Input Impedance 28 kΩ||pF Voltage Range −0.2 +3.2 V Rev. C | Page 5 of 24 Document Outline FEATURES APPLICATIONS FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION TABLE OF CONTENTS 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