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ADAS1000 bảng dữ liệu(PDF) 7 Page - Analog Devices

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Giải thích chi tiết về linh kiện  Low Power, Five Electrode Electrocardiogram (ECG) Analog Front End
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ADAS1000 bảng dữ liệu(HTML) 7 Page - Analog Devices

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Data Sheet
ADAS1000/ADAS1000-1/ADAS1000-2
Parameter
Min
Typ
Max
Unit
Test Conditions/Comments
DC LEAD-OFF
Internal current source, pulls up open ECG pins;
programmable in 10 nA steps: 10 nA to 70 nA
Lead-Off Current Accuracy
±10
%
Of programmed value
High Threshold Level1
2.4
V
Inputs are compared to threshold levels; if inputs
exceed levels, lead-off flag is raised
Low Threshold Level1
0.2
V
Threshold Accuracy
25
mV
AC LEAD-OFF
Programmable in 4 steps: 12.5 nA rms, 25 nA rms,
50 nA rms, 100 nA rms
Frequency Range
2.039
kHz
Fixed frequency
Lead-Off Current Accuracy
±10
%
Of programmed value, measured into low impedance
REFIN
Input Range2
1.76
1.8
1.84
V
Channel gain scales directly with REFIN
Input Current
113
μA
Per active ADC
450
675
950
μA
5 ECG channels and respiration enabled
REFOUT
On-chip reference voltage for ADC; not intended to
drive other components reference inputs directly,
must be buffered externally
Output Voltage, VREF
1.785
1.8
1.815
V
Reference Tempco1
±10
ppm/°C
Output Impedance2
0.1
Ω
Short Circuit Current1
4.5
mA
Short circuit to ground
Voltage Noise1
33
μV p-p
0.05 Hz to 150 Hz (ECG band)
17
μV p-p
0.05 Hz to 5 Hz (respiration)
CALIBRATION DAC
Available on CAL_DAC_IO (output for master, input
for slave)
DAC Resolution
10
Bits
Full-Scale Output Voltage
2.64
2.7
2.76
V
No load, nominal FS output is 1.5 × REFOUT
Zero-Scale Output Voltage
0.24
0.3
0.36
V
No load
DNL
−1
+1
LSB
Output Series Resistance2
10
Not intended to drive low impedance load, used for
slave CAL_DAC_IO configured as an input
Input Current
±5
nA
When used as input
CALIBRATION DAC TEST TONE
Output Voltage
0.9
1
1.1
mV p-p
Rides on common-mode voltage, VCM_REF = 1.3 V
Square Wave
1
Hz
Low Frequency Sine Wave
10
Hz
High Frequency Sine Wave
150
Hz
SHIELD DRIVER (ADAS1000/
ADAS1000-1 ONLY)
Output Voltage Range
0.3
2.3
V
Rides on common-mode voltage, VCM
Gain
1
V/V
Offset Voltage
−20
+20
mV
Short Circuit Current
15
25
μA
Output current limited by internal series resistance
Stable Capacitive Load2
10
nF
CRYSTAL OSCILLATOR
Applied to XTAL1 and XTAL2
Frequency2
8.192
MHz
Start-Up Time2
15
ms
Internal startup
CLOCK_IO
External clock source supplied to CLK_IO; this pin
is configured as an input when the device is
programmed as a slave
Operating Frequency2
8.192
MHz
Input Duty Cycle2
20
80
%
Output Duty Cycle2
50
%
DIGITAL INPUTS
Applies to all digital inputs
Input Low Voltage, VIL
0.3 × IOVDD
V
Input High Voltage, VIH
0.7 × IOVDD
V
Input Current, IIH, IIL
−1
+1
μA
−20
+20
μA
RESET has an internal pull-up
Pin Capacitance2
3
pF
Rev. B | Page 7 of 80


Số phần tương tự - ADAS1000

nhà sản xuấttên linh kiệnbảng dữ liệuGiải thích chi tiết về linh kiện
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ADAS1000 AD-ADAS1000 Datasheet
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Mô tả tương tự - ADAS1000

nhà sản xuấttên linh kiệnbảng dữ liệuGiải thích chi tiết về linh kiện
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