Datasheet AD8232 (Analog Devices) - 10

AD8232 Data Sheet OPERATIONAL AMPLIFIER PERFORMANCE CURVES 1000 800 600 S IT UN 400 200
4
100µs/DIV 0.5V/DIV
2 0
0
10866-
–4 –2 0 2 4
-021
OFFSET VOLTAGE (mV)
10866 Figure 21. Operational Amplifier Offset Distribution Figure 24. Operational Amplifier Large Signal Transient Response
140 180 10k GAIN PHASE MARGIN 120 160 100 140 ) 80 120 rees 1k ) eg ) B (D √Hz d 60 100 V/ ( IN n IN RG 40 80 E ( A GA IS M O E N 20 60 S 100 A H P 0 40 –20 20 –40 0 10
5
0.1 1 10 100 1k 10k 100k 1M
2 -022
0.1 1 10 100 1k 10k 100k
0
FREQUENCY (Hz) FREQUENCY (Hz)
10866 10866- Figure 22. Operational Amplifier Open-Loop Gain and Phase vs. Figure 25. Operational Amplifier Voltage Spectral Noise Density vs. Frequency Frequency
22pF 470pF 1nF 5µV/DIV
6
10µS/DIV 50mV/DIV
-023 02
1s/DIV
10866 0866- 1 Figure 23. Operational Amplifier Small Signal Response for Figure 26. Operational Amplifier 0.1 Hz to 10 Hz Noise Various Capacitive Loads Rev. C | Page 10 of 28 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