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ADS1278IPAPR Scheda tecnica(PDF) 3 Page - Texas Instruments

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Il numero della parte ADS1278IPAPR
Spiegazioni elettronici  Quad/Octal, Simultaneous Sampling, 24-Bit Analog-to-Digital Converters
PDF  51 Pages
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Produttore elettronici  TI1 [Texas Instruments]
Homepage  http://www.ti.com
Logo TI1 - Texas Instruments

ADS1278IPAPR Scheda tecnica(HTML) 3 Page - Texas Instruments

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ADS1274
ADS1278
www.ti.com
SBAS367F
– JUNE 2007 – REVISED FEBRUARY 2011
ELECTRICAL CHARACTERISTICS
All specifications at TA = –40°C to +105°C, AVDD = +5V, DVDD = +1.8V, IOVDD = +3.3V, fCLK = 27MHz, VREFP = 2.5V,
VREFN = 0V, and all channels active, unless otherwise noted.
ADS1274, ADS1278
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
ANALOG INPUTS
Full-scale input voltage (FSR(1))
VIN = (AINP – AINN)
±VREF
V
Absolute input voltage
AINP or AINN to AGND
AGND
– 0.1
AVDD + 0.1
V
Common-mode input voltage (VCM)
VCM = (AINP + AINN)/2
2.5
V
High-Speed mode
14
k
Ω
High-Resolution mode
14
k
Ω
Differential input impedance
Low-Power mode
28
k
Ω
Low-Speed mode
140
k
Ω
DC PERFORMANCE
Resolution
No missing codes
24
Bits
fCLK = 37MHz
144,531
SPS(3)
High-Speed mode(2)
fCLK = 32.768MHz
128,000
SPS
fCLK = 27MHz
105,469
SPS
Data rate (fDATA)
High-Resolution mode
52,734
SPS
Low-Power mode
52,734
SPS
Low-Speed mode
10,547
SPS
Integral nonlinearity (INL)(4)
Differential input, VCM = 2.5V
±0.0003
±0.0012
% FSR(1)
Offset error
0.25
2
mV
Offset drift
0.8
μV/°C
Gain error
0.1
0.5
% FSR
Gain drift
1.3
ppm/
°C
High-Speed mode
Shorted input
8.5
16
μV, rms
High-Resolution mode
Shorted input
5.5
12
μV, rms
Noise
Low-Power mode
Shorted input
8.5
16
μV, rms
Low-Speed mode
Shorted input
8.0
16
μV, rms
Common-mode rejection
fCM = 60Hz
90
108
dB
AVDD
80
dB
Power-supply rejection
DVDD
fPS = 60Hz
85
dB
IOVDD
105
dB
VCOM output voltage
No load
AVDD/2
V
(1)
FSR = full-scale range = 2VREF.
(2)
fCLK = 37MHz max for High-Speed mode, and 27MHz max for all other modes. See Table 7 for fCLK restrictions in High-Speed mode.
(3)
SPS = samples per second.
(4)
Best fit method.
© 2007–2011, Texas Instruments Incorporated
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Product Folder Link(s): ADS1274 ADS1278



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