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ADS1294IPAGR Datasheet(PDF) 6 Page - Texas Instruments

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Part # ADS1294IPAGR
Description  Low-Power, 8-Channel, 24-Bit Analog Front-End for Biopotential Measurements
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

ADS1294IPAGR Datasheet(HTML) 6 Page - Texas Instruments

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ADS1294, ADS1294R
ADS1296, ADS1296R
ADS1298, ADS1298R
SBAS459H
– JANUARY 2010 – REVISED OCTOBER 2011
www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
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
LEAD-OFF DETECT
Frequency
See the Register Map section for settings
0, fDR/4
kHz
Current
See the Register Map section for settings
6, 12, 18, 24
nA
Current accuracy
±20
%
Comparator threshold accuracy
±30
mV
RESPIRATION (ADS1294R/6R/8R Only)
Internal source
32, 64
kHz
Frequency
External source
32
64
kHz
Phase shift
See the Register Map section for settings
22.5
90
157.5
Degrees
Impedance range
IRESP = 30μA
10
k
Ω
0.05Hz to 2Hz brick wall filter, 32kHz
modulation clock, phase = 112.5,
Impedance measurement noise
20
m
ΩPP
using IRESP = 30μA with 2kΩ baseline load,
gain = 4 test condition
internal reference, signal path = 82k
Ω,
Modulator current
29
µA
baseline = 2.21k
Ω
EXTERNAL REFERENCE
3V supply VREF = (VREFP – VREFN)
2.5
V
Reference input voltage
5V supply VREF = (VREFP – VREFN)
4.0
V
Negative input (VREFN)
AVSS
V
Positive input (VREFP)
AVSS + 2.5
V
Input impedance
10
k
INTERNAL REFERENCE
Register bit CONFIG3.VREF_4V = 0,
2.4
V
AVDD
≥ 2.7V
Output voltage
Register bit CONFIG3.VREF_4V = 1,
4.0
V
AVDD
≥ 4.4V
VREF accuracy
±0.2
%
TA = +25°C
35
ppm/
°C
Internal reference drift
Commerical grade, 0
°C to +70°C
35
ppm
Industrial grade,
–40°C to +85°C
45
ppm
Start-up time
150
ms
SYSTEM MONITORS
Analog supply reading error
2
%
Digital supply reading error
2
%
From power-up to DRDY low
150
ms
Device wake up
STANDBY mode
9
ms
Temperature sensor reading, voltage
TA = +25°C
145
mV
Temperature sensor reading, coefficient
490
μV/°C
Test Signal
Signal frequency
See Register Map section for settings
Hz
fCLK/2
21, f
CLK/2
20
Signal voltage
See Register Map section for settings
±1, ±2
mV
Accuracy
±2
%
6
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Copyright
© 2010–2011, Texas Instruments Incorporated
Product Folder Link(s): ADS1294 ADS1294R ADS1296 ADS1296R ADS1298 ADS1298R


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