Datasheet AD8232 (Analog Devices) - 4

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AD8232 Data Sheet SPECIFICATIONS
VS = 3 V, VREF = 1.5 V, VCM = 1.5 V, TA = 25°C, operating temperature (TOPR) = −40°C to +105°C for the W grade, FR = low, SDN = high, and AC/DC = low, unless otherwise noted.
Table 1. Test Conditions/ A Grade W Grade Parameter Symbol Comments Min Typ Max Min Typ Max Unit
INSTRUMENTATION AMPLIFIER

Common-Mode Rejection Ratio, CMRR VCM = 0.35 V to 2.85 V, 80 86 dB DC to 60 Hz VDIFF = 0 V TOPR 80 dB VCM = 0.35 V to 2.85 V, 80 80 dB VDIFF = ±0.3 V Power Supply Rejection Ratio PSRR VS = 2.0 V to 3.5 V 76 90 dB TOPR 76 90 dB Offset Voltage (RTI) VOS Instrumentation Amplifier Inputs 3 8 mV TOPR 3 8 mV DC Blocking Input1 5 50 5 50 µV Average Offset Drift Instrumentation Amplifier Inputs 10 µV/°C TOPR 10 µV/°C DC Blocking Input1 0.05 0.05 µV/°C Input Bias Current IB 50 200 50 200 pA TA = 0°C to 70°C 1 nA TOPR 3.75 nA Input Offset Current IOS 25 100 25 100 pA TA = 0°C to 70°C 1 nA TOPR 1 nA Input Impedance Differential 10||7.5 10||7.5 GΩ||pF Common Mode 5||15 5||15 GΩ||pF Input Voltage Noise (RTI) Spectral Noise Density f = 1 kHz 100 100 nV/√Hz Peak-to-Peak Voltage Noise f = 0.1 Hz to 10 Hz 12 12 µV p-p f = 0.5 Hz to 40 Hz 14 14 µV p-p Input Voltage Range TA = 0°C to 70°C 0.2 +VS V TOPR 0.2 +VS V DC Differential Input Range VDIFF −300 +300 mV TOPR −300 +300 mV Output Output Swing RL = 50 kΩ 0.1 +VS − 0.1 V TOPR 0.1 +VS − 0.1 V Short-Circuit Current IOUT 6.3 6.3 mA Gain AV 100 100 V/V Gain Error VDIFF = 0 V 0.4 0.4 % VDIFF = −300 mV to 1 3.5 3.5 % +300 mV TOPR 7.9 % Average Gain Drift TA = 0°C to 70°C 12 ppm/°C TOPR 12 ppm/°C Bandwidth BW 2 2 kHz RFI Filter Cutoff (Each Input) 1 1 MHz Rev. D | Page 4 of 32 Document Outline Features Applications Functional Block Diagram General Description Revision History Specifications Absolute Maximum Ratings ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Instrumentation Amplifier Performance Curves Operational Amplifier Performance Curves Right Leg Drive (RLD) Amplifier Performance Curves Reference Buffer Performance Curves System Performance Curves Theory of Operation Architecture Overview Instrumentation Amplifier Operational Amplifier Right Leg Drive Amplifier Reference Buffer Fast Restore Circuit Leads Off Detection DC Leads Off Detection AC Leads Off Detection Standby Operation Input Protection Radio Frequency Interference (RFI) Power Supply Regulation and Bypassing Input Referred Offsets Layout Recommendations Applications Information Eliminating Electrode Offsets High-Pass Filtering Two-Pole High-Pass Filter Additional High-Pass Filtering Options Low-Pass Filtering and Gain Driving Analog-to-Digital Converters Driven Electrode Application Circuits Heart Rate Measurement Next to the Heart Exercise Application: Heart Rate Measured at the Hands Cardiac Monitor Configuration Portable Cardiac Monitor with Elimination of Motion Artifacts Packaging and Ordering Information Outline Dimensions Ordering Guide