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ADS8325 bảng dữ liệu(PDF) 5 Page - Texas Instruments

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tên linh kiện ADS8325
Giải thích chi tiết về linh kiện  16-Bit, High-Speed, 2.7V to 5.5V microPower Sampling ANALOG-TO-DIGITAL CONVERTER
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ADS8325 bảng dữ liệu(HTML) 5 Page - Texas Instruments

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ELECTRICAL CHARACTERISTICS: VDD = +2.7V
ADS8325
SBAS226C – MARCH 2002 – REVISED AUGUST 2007
Over recommended operating free-air temperature at –40
°C to +85°C, V
REF = +2.5V, –IN = GND, fSAMPLE = 100kHz, and fCLK
= 24
× f
SAMPLE, unless otherwise noted.
ADS8325I
ADS8325IB
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNIT
ANALOG INPUT
Full-scale range
FSR +IN – (–IN)
0
VREF
0
VREF
V
Operating common-mode signal
–0.3
0.5
–0.3
0.5
V
Input resistance
–IN = GND
5
5
G
Input capacitance
–IN = GND, during sampling
45
45
pF
Input leakage current
–IN = GND
±50
±50
nA
Differential input capacitance
+IN to –IN, during sampling
20
20
pF
Full-power bandwidth
FSBW FS sinewave, SINAD = –3 dB
4
4
kHz
DC ACCURACY
Resolution
16
16
Bits
No missing code
NMC
14
15
Bits
Integral linearity error
INL
±3
±6
±1.5
±4
LSB
Offset error
VOS
±0.75
±1.5
±0.5
±1
mV
Offset error drift
TCVOS
±3
±3
ppm/
°C
Gain error
GERR
±33
±16
LSB
Gain error drift
TCGERR
±0.3
±0.3
ppm/
°C
Noise
20
20
μVRMS
Power-supply rejection
2.7V
≤ VDD ≤ 3.6V
7
7
LSB
SAMPLING DYNAMICS
Conversion time
tCONV 24kHz < fCLK ≤ 2.4MHz
6.667
666.7
6.667
666.7
μs
Acquisition time
tAQ fCLK = 2.4MHz
1.875
1.875
μs
Throughput rate
100
100
kSPS
Clock frequency
0.024
2.4
0.024
2.4
MHz
AC ACCURACY
Total harmonic distortion
THD 2.5VPP sinewave, at 1kHz
–94
–94
dB
Spurious-free dynamic range
SFDR 2.5VPP sinewave, at 1kHz
–96
–96
dB
Signal-to-noise ratio
SNR
–85
–86
dB
Signal-to-noise + distortion
SINAD 2.5VPP sinewave, at 1kHz
–85
–85.5
dB
Effective number of bits
ENOB
13.8
13.9
Bits
VOLTAGE REFERENCE INPUT
Reference voltage
2.5
VDD + 0.3
2.5
VDD + 0.3
V
CS = GND, fSAMPLE = 0Hz
5
5
k
Reference input resistance
CS = VDD
5
5
G
Reference input capacitance
20
20
pF
0.5
0.75
0.5
0.75
mA
Reference input current
CS = VDD
0.1
0.1
μA
DIGITAL INPUTS(1)
Logic family
LVCMOS
LVCMOS
High-level input voltage
VIH VDD = 3.6V
2
VDD + 0.3
2
VDD + 0.3
V
Low-level input voltage
VIL VDD = 2.7V
–0.3
0.8
–0.3
0.8
V
Input current
IIN VI = VDD or GND
±50
±50
nA
Input capacitance
CI
5
5
pF
(1)
Applies for 3.0V nominal supply: VDD (min) = 2.7V and VDD (max) = 3.6V.
Copyright © 2002–2007, Texas Instruments Incorporated
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