AD8232 Datasheet PDF - Analog Devices

www.Datasheet-PDF.com

AD8232
Analog Devices

Part Number AD8232
Description Heart Rate Monitor Front End
Page 28 Pages


AD8232 datasheet pdf
Download PDF for PC
AD8232 pdf
View PDF for Mobile


No Preview Available !

Data Sheet
Single-Lead, Heart Rate Monitor Front End
AD8232
FEATURES
Fully integrated single-lead ECG front end
Low supply current: 170 µA (typical)
Common-mode rejection ratio: 80 dB (dc to 60 Hz)
Two or three electrode configurations
High signal gain (G = 100) with dc blocking capabilities
2-pole adjustable high-pass filter
Accepts up to ±300 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: ac or dc options
Integrated right leg drive (RLD) amplifier
Single-supply operation: 2.0 V to 3.5 V
Integrated reference buffer generates virtual ground
Rail-to-rail output
Internal RFI filter
8 kV HBM ESD rating
Shutdown pin
20-lead 4 mm × 4 mm LFCSP package
APPLICATIONS
Fitness and activity heart rate monitors
Portable ECG
Remote health monitors
Gaming peripherals
Biopotential signal acquisition
GENERAL DESCRIPTION
The AD8232 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 architec-
ture 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.
FUNCTIONAL BLOCK DIAGRAM
20 19
HPSENSE IAOUT
HPDRIVE
1
S1 10kΩ
+IN
2
–IN IA
3
18 17
REFIN +VS
A3
16
GND
FR 15
AC/DC 14
150kΩ
4
RLDFB
5 A2
RLD
10kΩ
AD8232
S2
LEADS-OFF
DETECTION
SDN 13
LOD+
C1 12
LOD–
C2 11
A1
SW OPAMP+ REFOUT OPAMP–
6 7 89
Figure 1.
OUT
10
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 in a 4 mm × 4 mm, 20-lead LFCSP
package. Performance is specified from 0°C to 70°C and is
operational from −40°C to +85°C.
Rev. A
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevices for itsuse,nor foranyinfringementsofpatentsor 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.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2012–2013 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com

AD8232 datasheet pdf
Download PDF for PC
AD8232 pdf
View PDF for Mobile


Related : Start with AD823 Part Numbers by
AD823 Dual/ 16 MHz/ Rail-to-Rail FET Input Amplifier AD823
Analog Devices
AD823 pdf
AD8230 Precision Instrumentation Amplifier AD8230
Analog Devices
AD8230 pdf
AD8231 Digital Programmable Instrumentation Amplifier AD8231
Analog Devices
AD8231 pdf
AD8232 Heart Rate Monitor Front End AD8232
Analog Devices
AD8232 pdf
AD8233 Heart Rate Monitor AD8233
Analog Devices
AD8233 pdf
AD8235 Micropower Instrumentation Amplifier AD8235
Analog Devices
AD8235 pdf
AD8236 Micropower Instrumentation Amplifier AD8236
Analog Devices
AD8236 pdf
AD8237 True Rail-to-Rail Instrumentation Amplifier AD8237
Analog Devices
AD8237 pdf

Index :   0   1   2   3   4   5   6   7   8   9   A   B   C   D   E   F   G   H   I   J   K   L   M   N   O   P   Q   R   S   T   U   V   W   X   Y   Z   NEW   

Since 2010   ::   HOME   ::   Contact