Datasheet AD8232 (Analog Devices) - 7

Data Sheet AD8232 TYPICAL PERFORMANCE CHARACTERISTICS
VS = 3 V, VREF = 1.5 V, VCM = 1.5 V, TA = 25°C, unless otherwise noted.
INSTRUMENTATION AMPLIFIER PERFORMANCE CURVES 1200 50 40 1000 30 A) (p 20 800 T N 10 RE S T 600 0 CUR UNI AS –10 BI 400 T U P –20 IN –30 200 –40 0 –50 –120 –90 –60 –30 0 30 60 90 120
-003
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
-006
CMRR (µV/V)
10866
INPUT COMMON-MODE VOLTAGE (V)
10866 Figure 3. Instrumentation Amplifier CMRR Distribution Figure 6. Instrumentation Amplifier Input Bias Current vs. CMV
50 NO DC OFFSET 300mV OFFSET 1400 40 1200 30 1000 ) B S d 800 ( IT 20 IN UN GA 600 10 400 0 200 0 –10
7 0 0
–2.0 –1.5 –1.0 –0.5 0 0.5 1.0 1.5 2.0 1 10 100 1k 10k 100k
-004
GAIN ERROR (%) FREQUENCY (Hz)
10866- 10866 Figure 4. Instrumentation Amplifier Gain Error Distribution Figure 7. Instrumentation Amplifier Gain vs. Frequency
3.5 120 ) 3.0 V ( E 100 G 2.5 A T L O 2.0 V 80 B) DE O (d 1.5 RR N-M M O C 60 M 1.0 M CO 0.5 T U 40 P IN NO DC OFFSET 0 +300mV OFFSET –300mV OFFSET –0.5 20
8 0
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
0 -005
10 100 1k 10k 100k OUTPUT VOLTAGE (V) FREQUENCY (Hz)
10866 10866- Figure 5. Instrumentation Amplifier Figure 8. Instrumentation Amplifier CMRR vs. Frequency, RTI Input Common-Mode Range vs. Output Voltage Rev. C | Page 7 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