|
|
PDF AD8233 Data sheet ( Hoja de datos )
| Número de pieza | AD8233 | |
| Descripción | Heart Rate Monitor | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de AD8233 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
|
No Preview Available !
Data Sheet
50 μA, 2 mm × 1.7 mm WLCSP, Low Noise,
Heart Rate Monitor for Wearable Products
AD8233
FEATURES
Fully integrated, single-lead electrocardiogram (ECG) front end
Low quiescent supply current: 50 μA (typical)
Leads on/off detection while in shutdown (<1 μA)
Common-mode rejection ratio: 80 dB (dc to 60 Hz)
2 or 3 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
Integrated right leg drive (RLD) amplifier with shutdown
Single-supply operation: 1.7 V to 3.5 V
Integrated reference buffer generates virtual ground
Rail-to-rail output
Internal RFI filter
8 kV human body model (HBM) ESD rating
Shutdown pin
2 mm × 1.7 mm WLCSP
APPLICATIONS
Fitness and activity heart rate monitors
Portable ECG
Wearable and remote health monitors
Gaming peripherals
Biopotential signal acquisition, such as EMG
GENERAL DESCRIPTION
The AD8233 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 an ultralow
power analog-to-digital converter (ADC) or an embedded
microcontroller to easily acquire the output signal.
The AD8233 implements 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 AD8233 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 the common-mode rejection of the line frequencies
in the system and other undesired interferences, the AD8233
Rev. 0
Document Feedback
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.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
FUNCTIONAL BLOCK DIAGRAM
A4 B4
HPSENSE IAOUT
HPDRIVE
A5
S1 10kΩ
+IN
B5
–IN
C5
IA
A3
REFIN
A2
+VS
A3
A1
GND
FR B3
AC/DC B2
150kΩ
C4
RLDFB
D5 A2
RLD
10kΩ
AD8233
S2
SDN B1
RLD SDN C2
LEADS OFF
DETECTION
LOD
C C1
A1
SW OPAMP+ REFOUT OPAMP–
D4 D3 C3 D2
OUT
D1
Figure 1.
includes an amplifier for driven lead applications, RLD.
The AD8233 includes a fast restore function that reduces the
duration of the 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 AD8233 automatically
adjusts to a higher filter cutoff. This feature allows the AD8233
to recover quickly, and therefore, to take valid measurements
soon after connecting the electrodes to the subject.
The AD8233 is available in a 2 mm × 1.7 mm, 20-ball WLCSP
package. Performance is specified from 0°C to 70°C and is
operational from −40°C to +85°C.
Table 1. AD8232 vs. AD8233 Comparison
Parameter
AD8232
AD8233
Supply Current
170 μA
50 μA
Peak-to-Peak Voltage Noise
(f = 0.5 Hz to 40 Hz)
14 μV p-p
8.5 μV
Leads On/Off Detection in
Shutdown
Not included
Included
Right Leg Drive Shutdown
Not included
Included
Package Size
4 mm × 4 mm ×
0.75 mm
2 mm × 1.7 mm ×
0.5 mm
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
©2016 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
1 page  
AD8233
Parameter
Slew Rate
Voltage Noise Density (RTI)
Peak-to-Peak Voltage Noise (RTI)
RIGHT LEG DRIVE AMPLIFIER (A2)
Quiescent Supply Current
Output Swing
Short-Circuit Current
Integrator Input Resistor
Gain Bandwidth Product
REFERENCE BUFFER (A3)
Offset Error
Input Bias Current
Short-Circuit Current Limit
Voltage Range
DC LEADS OFF COMPARATORS
Threshold Voltage
Hysteresis
Propagation Delay
AC LEADS OFF DETECTOR
Square Wave Frequency
Square Wave Amplitude
Input Currents in Shutdown Mode2
Impedance Threshold
Detection Delay
FAST RESTORE CIRCUIT
Switches
On Resistance
Off Leakage
Window Comparator
Threshold Voltage
Propagation Delay
Switch Timing Characteristics
Feedback Recovery Switch On Time
Filter Recovery Switch On Time
Fast Restore Reset
LOGIC INTERFACE
Input Characteristics
Input Voltage (AC/DC, FR, and
RLD SDN)
Low
High
Input Voltage (SDN)
Low
High
Output Characteristics
Output Voltage
Low
High
Symbol
SR
en
en p-p
IOUT
GDP
VOS
IB
IOUT
fAC
IAC
IDC
RON
tS1
tS2
tRST
VIL
VIH
VIL
VIH
VOL
VOH
Test Conditions/Comments
f = 1 kHz
f = 0.1 Hz to 10 Hz
f = 0.5 Hz to 40 Hz
RL = 50 kΩ
RL > 50 kΩ
RL = 50 kΩ
+IN, SDN = low
−IN, SDN = low
Between +IN and −IN, SDN = high
S1 and S2
From either rail
+VS = 3 V
+VS = 1.8 V
+VS = 3 V
+VS = 1.8 V
+VS = 3 V
+VS = 1.8 V
LOD terminal
RL = 100 kΩ
Rev. 0 | Page 4 of 29
Data Sheet
Min Typ
Max Unit
0.01 V/μs
120 nV/√Hz
7 μV p-p
9 μV p-p
7.5
0.1
11
120 150
20
10
+VS − 0.1
180
μA
V
mA
kΩ
kHz
1
100
12
0.1
+VS − 0.7
mV
pA
mA
V
+VS − 0.27
125
1.5
V
mV
μs
50 100
200
250
−300
10 20
100
175
kHz
nA p-p
nA
nA
MΩ
μs
8 10
100
100
2
160
80
80
40
3
1.5
12
kΩ
pA
mV
μs
ms
ms
μs
0.41 × +VS
0.45 × +VS
0.6 × +VS
0.3 × +VS
0.05
+VS − 0.05
V
V
V
V
V
V
5 Page 
AD8233
400µs/DIV
0.5V/DIV
Figure 15. Large Signal Pulse Response
1.5
1.0
0.5
0
–0.5
–1.0
–1.5
100
–40°C
+25°C
+85°C
1k 10k 100k
LOAD (Ω)
Figure 16. Output Voltage Swing vs. Load
1M
0.4
0.3
0.2
0.1
0
–0.1
–0.2
–0.3
–0.4
–40
–20 0 20 40 60 80
TEMPERATURE (°C)
Figure 17. DC Blocking Input Offset Drift
100
Data Sheet
4.0
IB
3.5 IOS
80
70
3.0 60
2.5 50
2.0 40
1.5 30
1.0 20
0.5 10
00
–0.5 –10
–1.0
–40
–20
0 20 40 60
TEMPERATURE (°C)
–20
80 100
Figure 18. Input Bias Current (IB) and Input Offset Current (IOS) vs.
Temperature
0.5
0.4
0.3
0.2
0.1
0
–0.1
–0.2
–0.3
–0.4
–0.5
–40
–20 0
20 40 60 80
TEMPERATURE (°C)
Figure 19. Gain Error vs. Temperature
100
10
8
6
4
2
0
–2
–4
–6
–8
–10
–40
–20 0
20 40 60
TEMPERATURE (°C)
Figure 20. CMRR vs. Temperature
80
100
Rev. 0 | Page 10 of 29
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet AD8233.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| AD823 | Dual/ 16 MHz/ Rail-to-Rail FET Input Amplifier | Analog Devices |
| AD8230 | Precision Instrumentation Amplifier | Analog Devices |
| AD8231 | Digital Programmable Instrumentation Amplifier | Analog Devices |
| AD8232 | Heart Rate Monitor Front End | Analog Devices |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |