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ADS131E08SPAGR Arkusz danych(PDF) 7 Page - Texas Instruments

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Numer części ADS131E08SPAGR
Szczegółowy opis  Eight-Channel, 24-Bit, Analog Front-End with Fast Power-Up Time
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Producent  TI1 [Texas Instruments]
Strona internetowa  http://www.ti.com
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ADS131E08SPAGR Arkusz danych(HTML) 7 Page - Texas Instruments

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ADS131E08S
www.ti.com
SBAS705A – JUNE 2015 – REVISED JANUARY 2016
Product Folder Links: ADS131E08S
Submit Documentation Feedback
Copyright © 2015–2016, Texas Instruments Incorporated
(1)
Minimum and maximum values are specified by design and characterization data.
(2)
CMRR is measured with a common-mode signal of (AVSS + 0.3 V) to (AVDD – 0.3 V). The values indicated are the minimum of the
eight channels.
7.5 Electrical Characteristics
Minimum and maximum specifications apply from TA = –40°C to +105°C. Typical specifications are at TA = 25°C. All
specifications are at DVDD = 1.8 V, AVDD = 5 V, AVSS = 0 V, VREF = 4.0 V, external fCLK = 2.048 MHz, data rate = 4 kSPS,
and gain = 1 (unless otherwise noted).
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
ANALOG INPUTS
Ci
Input capacitance
20
pF
IIB
Input bias current
PGA output in normal range
5
nA
DC input impedance
200
M
PGA PERFORMANCE
Gain settings
1, 2, 4, 8, 12
V/V
BW
Bandwidth
See Table 3
ADC PERFORMANCE
DR
Data rate
fCLK = 2.048 MHz
1
4
64
kSPS
Resolution
DR = 1 kSPS, 2 kSPS, 4 kSPS, 8 kSPS, and
16 kSPS
24
Bits
DR = 32 kSPS and 64 kSPS
16
CHANNEL PERFORMANCE (DC Performance)
INL
Integral nonlinearity
Full-scale, best fit
10
ppm
Dynamic range
Data rate = 4 kSPS, gain = 1
116
dB
Gain settings other than 1
See the Noise Measurements section
EO
Offset error(1)
Gain = 1
–100
–450
–800
µV
Offset error drift(1)
0.2
2.5
µV/°C
EG
Gain error
Excluding voltage reference error
0.1%
Gain drift
Excluding voltage reference drift
3
ppm/°C
Gain match between channels
0.2
% of FS
CHANNEL PERFORMANCE (AC Performance)
CMRR
Common-mode rejection ratio
fCM = 50 Hz or 60 Hz
(2)
–110
dB
PSRR
Power-supply rejection ratio
fPS = 50 Hz or 60 Hz
–80
dB
Crosstalk
fIN = 50 Hz or 60 Hz
–125
–113
dB
SNR
Signal-to-noise ratio
fIN = 50 Hz or 60 Hz, amplitude = –0.5 dBFS,
normalized
108
dB
fIN = 50 Hz or 60 Hz, amplitude = –15 dBFS,
normalized
115
THD
Total harmonic distortion
fIN = 50 Hz or 60 Hz, amplitude = –0.5 dBFS
–102
dBc
fIN = 50 Hz or 60 Hz, amplitude = –15 dBFS
–107
INTERNAL VOLTAGE REFERENCE
VREF
Output voltage(1)
TA = 25°C, VREF = 2.4 V, VREF_4V = 0
2.4
V
TA = 25°C, VREF = 4 V, VREF_4V = 1
3.88
4
4.12
Accuracy
TA = 25°C
±0.2%
Temperature drift
TA = –40°C ≤ TA ≤ 105°C
8
ppm/°C
Power-up time
VCAP1 = 470 pF, VREFP = 330 nF, settled
to 0.2%
1
ms
INTERNAL OSCILLATOR
Internal oscillator clock frequency
2.048
MHz
Internal oscillator accuracy(1)
TA = 25°C
±1%
–40°C
≤ TA ≤ +105°C
±3%
Power-up time
20
µs
Internal oscillator power consumption
120
µW


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