Datasheet AD8232 (Analog Devices) - 5

Data Sheet AD8232 Test Conditions/ A Grade W Grade Parameter Symbol Comments Min Typ Max Min Typ Max Unit
OPERATIONAL AMPLIFIER (A1) Offset Voltage VOS 1 5 mV TOPR 1 5 mV Average TC TA = 0°C to 70°C 5 µV/°C TOPR 5 µV/°C Input Bias Current IB 100 100 pA TA = 0°C to 70°C 1 nA TOPR 2.5 nA Input Offset Current IOS 100 100 pA TA = 0°C to 70°C 1 nA TOPR 1 nA Input Voltage Range 0.1 +VS − 0.1 0.1 +VS − 0.1 V Common-Mode Rejection Ratio CMRR VCM = 0.5 V to 2.5 V 100 100 dB Power Supply Rejection Ratio PSRR 100 100 dB Large Signal Voltage Gain AVO 110 110 dB Output Voltage Range RL = 50 kΩ 0.1 +VS − 0.1 V TOPR 0.1 +VS − 0.1 V Short-Circuit Current Limit IOUT 12 12 mA Gain Bandwidth Product GBP 100 100 kHz Slew Rate SR 0.02 0.02 V/µs Voltage Noise Density (RTI) en f = 1 kHz 60 60 nV/√Hz Peak-to-Peak Voltage Noise (RTI) en p-p f = 0.1 Hz to 10 Hz 6 6 µV p-p f = 0.5 Hz to 40 Hz 8 8 µV p-p RIGHT LEG DRIVE AMPLIFIER (A2) Output Swing RL = 50 kΩ 0.1 +VS − 0.1 0.1 +VS − 0.1 V Short-Circuit Current IOUT 11 11 mA Integrator Input Resistor 120 150 180 120 150 180 kΩ Gain Bandwidth Product GDP 100 100 kHz REFERENCE BUFFER (A3) Offset Error VOS RL > 50 kΩ 1 1 mV Input Bias Current IB 100 100 pA Short-Circuit Current Limit IOUT 12 12 mA Voltage Range RL = 50 kΩ 0.1 +VS − 0.7 V TOPR 0.1 +VS − 0.7 V DC LEADS OFF COMPARATORS Threshold Voltage +VS − +VS − V 0.5 0.5 Hysteresis 60 60 mV Propagation Delay 0.5 0.5 µs AC LEADS OFF DETECTOR Square Wave Frequency fAC 50 100 175 50 100 175 kHz Square Wave Amplitude IAC 200 200 nA p-p Impedance Threshold Between +IN and −IN 10 20 10 20 MΩ Detection Delay 110 110 μs FAST RESTORE CIRCUIT Switches S1 and S2 On Resistance RON 8 10 12 8 10 12 kΩ Off Leakage 100 100 pA Window Comparator Threshold Voltage From either rail 50 50 mV Propagation Delay 2 2 µs Switch Timing Characteristics Feedback Recovery Switch On Time tSW1 110 110 ms Filter Recovery Switch On Time tSW2 55 55 ms Fast Restore Reset tRST 2 2 µs Rev. D | Page 5 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