Details, datasheet, quote on part number: AD8232-EVALZ
PartAD8232-EVALZ
Category
TitleBOARD EVAL FOR AD8232
Description

ADI’s AD8232 are signal conditionally block for ECG / EKG heart rate monitoring used in medical, fitness and gaming. The device has an operation temperature range of -40°C to +85°C and comes in an ultra-small (4 mm x 4 mm) 20-LFCSP package. With low voltage requirement of 2 V to 3.5 V and low current (typical) of 170 µA this device is idea for wearable and battery applications. The AD8232 is optimized for either of two- or three-electrode configurations and has a rail-to-rail output.



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Others parts numbering
AD8232ACPZ-R7: IC AFE HEART MONITOR 20LFCSP
AD8232ACPZ-WP

 

Features, Applications
FEATURES

Fully integrated single-lead ECG front end Low supply current: 170 A (typical) Common-mode rejection ratio: 80 dB (dc to 60 Hz) Two or three electrode configurations High signal gain = 100) with dc blocking capabilities 2-pole adjustable high-pass filter Accepts mV of half cell potential Fast restore feature improves filter settling Uncommitted op amp 3-pole adjustable low-pass filter with adjustable gain Leads off detection: or dc options Integrated right leg drive (RLD) amplifier Single-supply operation: 3.5 V Integrated reference buffer generates virtual ground Rail-to-rail output Internal RFI filter 8 kV HBM ESD rating Shutdown pin 4 mm LFCSP package

APPLICATIONS

Fitness and activity heart rate monitors Portable ECG Remote health monitors Gaming peripherals Biopotential signal acquisition

The is an integrated signal conditioning block for ECG and other biopotential measurement applications. It is designed to extract, amplify, and filter small biopotential signals in the presence of noisy conditions, such as those created by motion or remote electrode placement. This design allows for an ultralow power analog-to-digital converter (ADC) or an embedded microcontroller to acquire the output signal easily. The AD8232 can implement a two-pole high-pass filter for eliminating motion artifacts and the electrode half-cell potential. This filter is tightly coupled with the instrumentation architecture of the amplifier to allow both large gain and high-pass filtering in a single stage, thereby saving space and cost. An uncommitted operational amplifier enables the AD8232 to create a three-pole low-pass filter to remove additional noise. The user can select the frequency cutoff of all filters to suit different types of applications. To improve common-mode rejection of the line frequencies in the system and other undesired interferences, the AD8232 includes an amplifier for driven lead applications, such as right leg drive (RLD). The AD8232 includes a fast restore function that reduces the duration of otherwise long settling tails of the high-pass filters. After an abrupt signal change that rails the amplifier (such as a leads off condition), the AD8232 automatically adjusts to a higher filter cutoff. This feature allows the AD8232 to recover quickly, and therefore, to take valid measurements soon after connecting the electrodes to the subject. The AD8232 is available 4 mm, 20-lead LFCSP package. Performance is specified from to 70C and is operational from to +85C.

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Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners.

Features.............................................................................................. 1 Applications....................................................................................... 1 Functional Block Diagram.............................................................. 1 General Description......................................................................... 1 Revision History............................................................................... 2 Specifications..................................................................................... 3 Absolute Maximum Ratings............................................................ 5 ESD Caution.................................................................................. 5 Pin Configuration and Function Descriptions............................. 6 Typical Performance Characteristics............................................. 7 Instrumentation Amplifier Performance Curves..................... 7 Operational Amplifier Performance Curves.......................... 10 Right Leg Drive (RLD) Amplifier Performance Curves....... 13 Reference Buffer Performance Curves.................................... 14 System Performance Curves..................................................... 15 Theory of Operation...................................................................... 16 Architecture Overview.............................................................. 16 Instrumentation Amplifier........................................................ 16 Operational Amplifier............................................................... 16 Right Leg Drive Amplifier......................................................... 17 Reference Buffer......................................................................... 17 Fast Restore Circuit.................................................................... 17 Leads Off Detection................................................................... 18

Standby Operation..................................................................... 19 Input Protection......................................................................... 19 Radio Frequency Interference (RFI)........................................ 20 Power Supply Regulation and Bypassing................................ 20 Input Referred Offsets............................................................... 20 Layout Recommendations........................................................ 20 Applications Information.............................................................. 21 Eliminating Electrode Offsets.................................................. 21 High-Pass Filtering.................................................................... 21 Low-Pass Filtering and Gain..................................................... 23 Driving Analog-to-Digital Converters.................................... 23 Driven Electrode........................................................................ 23 Application Circuits....................................................................... 24 Heart Rate Measurement Next to the Heart........................... 24 Exercise Application: Heart Rate Measured at the Hands.... 24 Cardiac Monitor Configuration............................................... 25 Portable Cardiac Monitor with Elimination of Motion Artifacts....................................................................................... 25 Packaging and Ordering Information......................................... 27 Outline Dimensions................................................................... 27 Ordering Guide.......................................................................... 27

0 to Rev. A Changes to Table 1............................................................................ 4 Changes to Table 2............................................................................ 6 Change to Figure 17......................................................................... 9 Changes to Figure 22 and Figure 25............................................. 11 Changes to Figure 34 and Figure 36............................................. 14 Changes to Figure 45, Architecture Overview Section, and Instrumentation Amplifier Section.............................................. 17 Changes to Right Leg Drive Amplifier Section, Reference Buffer Section, Fast Restore Circuit Section, and Figure 48; Added Figure 46, Renumbered Sequentially........................................... 18 Changes to Figure 49...................................................................... 19 Changes to AC Leads Off Detection Section and Standby Operation Section........................................................................... 20 Changes to Input Referred Offsets Section................................. 21 Changes to Figure 53 and High-Pass Filtering Section............. 22 Changes to Additional High-Pass Filtering Options Section; Added Table 4................................................................................. 23 Changes to Low-Pass Filtering and Gain Section; Added Driving Analog-to-Digital Converters Section and Figure 61................ 24 Changes to Figure 62, Figure 64, and Heart Rate Measurement Next to the Heart Section.............................................................. 25 Changes to Exercise Application: Heart Rate Measured at the Hands and Figure 66...................................................................... 26 Changes to Figure 8/12--Revision 0: Initial Version

3 V, VREF 1.5 V, VCM = 25C, FR=low, SDN=high, AC/DC = low, unless otherwise noted. Table 1.

Parameter INSTRUMENTATION AMPLIFIER Common-Mode Rejection Ratio, 60 Hz Power Supply Rejection Ratio Offset Voltage (RTI) Instrumentation Amplifier Inputs DC Blocking Input 1 Average Offset Drift Instrumentation Amplifier Inputs DC Blocking Input1 Input Bias Current Input Offset Current Input Impedance Differential Common Mode Input Voltage Noise (RTI) Spectral Noise Density Peak-to-Peak Voltage Noise Input Voltage Range DC Differential Input Range Output Swing Short-Circuit Current Gain Error Average Gain Drift Bandwidth RFI Filter Cutoff (Each Input) OPERATIONAL AMPLIFIER (A1) Offset Voltage Average TC Input Bias Current Input Offset Current Input Voltage Range Common-Mode Rejection Ratio Power Supply Rejection Ratio Large Signal Voltage Gain Output Voltage Range Short-Circuit Current Limit Gain Bandwidth Product Slew Rate Voltage Noise Density (RTI) Peak-to-Peak Voltage Noise (RTI) Symbol CMRR Test Conditions/Comments VCM 2.85 V, VDIFF 0 V VCM 2.85 V, VDIFF 3.5 V Min 80 Typ = 1 kHz to 70C VDIFF 50 k IOUT AV VDIFF 0 V VDIFF 70C BW CMRR PSRR AVO IOUT GBP SR en p-p VCM 2.5 V +VS 8 50 Max

Unit mV V V/C pA nA G||pF nV/Hz V p-p V p-p V mA V/V % ppm/C kHz MHz mV V/C V mA kHz V/s nV/Hz V p-p V p-p


 

Some Part number from the same manufacture Analog Devices
AD8232ACPZ-R7

ADI’s AD8232 are signal conditionally block for ECG / EKG heart rate monitoring used in medical, fitness and gaming. The device has an operation temperature range of -40°C to +85°C and comes

AD8232ACPZ-WP
 
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