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ADS1298CZXGR Datasheet(PDF) 3 Page - Texas Instruments

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No. de pieza ADS1298CZXGR
Descripción Electrónicos  Low-Power, 8-Channel, 24-Bit Analog Front-End for Biopotential Measurements
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Fabricante Electrónico  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
Logo TI1 - Texas Instruments

ADS1298CZXGR Datasheet(HTML) 3 Page - Texas Instruments

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ADS1294, ADS1294R
ADS1296, ADS1296R
ADS1298, ADS1298R
www.ti.com
SBAS459I
– JANUARY 2010 – REVISED JANUARY 2012
ELECTRICAL CHARACTERISTICS
Minimum/maximum specifications apply for all commercial grade (0
°C to +70°C) devices and from –40°C to +85°C for
industrial grades devices. Typical specifications are at +25
°C. All specifications at DVDD = 1.8V, AVDD – AVSS = 3V
(1),
VREF = 2.4V, external fCLK = 2.048MHz, data rate = 500SPS, High-Resolution mode, and gain = 6, unless otherwise noted.
ADS1294, ADS1296, ADS1298
ADS1294R, ADS1296R, ADS1298R
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
ANALOG INPUTS
Full-scale differential input voltage (AINP
– AINN)
±VREF/GAIN
V
See the Input Common-Mode Range
Input common-mode range
subsection of the PGA Settings and Input
Range section
Input capacitance
20
pF
TA = +25°C, input = 1.5V
±200
pA
Input bias current
TA = 0°C to +70°C, input = 1.5V
±1
nA
TA = –40°C to +85°C, input = 1.5V
±1.2
nA
No lead-off
1000
M
DC input impedance
Current source lead-off detection
500
M
Pull-up resistor lead-off detection
10
M
PGA PERFORMANCE
Gain settings
1, 2, 3, 4, 6, 8, 12
Bandwidth
See Table 6
ADC PERFORMANCE
Data rates up to 8kSPS, no missing codes
24
Bits
Resolution
16kSPS data rate
19
Bits
32kSPS data rate
17
Bits
fCLK = 2.048MHz, High-Resolution mode
500
32000
SPS
Data rate
fCLK = 2.048MHz, Low-Power mode
250
16000
SPS
CHANNEL PERFORMANCE
DC Performance
Gain = 6(2), 10 seconds of data
5
μVPP
Gain = 6, 256 points, 0.5 seconds of data
4
7
μVPP
Input-referred noise
Gain settings other than 6, data rates other
See Noise Measurements section
than 500SPS
Full-scale with gain = 6, best fit
8
ppm
Full-scale with gain = 6, best fit,
40
ppm
Integral nonlinearity
ADS1294R/6R/8R channel 1
–20dBFS with gain = 6, best fit,
8
ppm
ADS1294R/6R/8R channel 1
Offset error
±500
µV
Offset error drift
2
µV/°C
Gain error
Excluding voltage reference error
±0.2
±0.5
% of FS
Gain drift
Excluding voltage reference drift
5
ppm/
°C
Gain match between channels
0.3
% of FS
(1)
Performance is applicable for 5V operation as well. Production testing for limits is performed at 3V.
(2)
Noise data measured in a 10-second interval. Test not performed in production. Input-referred noise is calculated with input shorted
(without electrode resistance) over a 10-second interval.
Copyright
© 2010–2012, Texas Instruments Incorporated
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Product Folder Link(s): ADS1294 ADS1294R ADS1296 ADS1296R ADS1298 ADS1298R


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