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ADS8322Y/250 bảng dữ liệu(PDF) 3 Page - Texas Instruments

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Giải thích chi tiết về linh kiện  16-Bit, 500kHz, MicroPower Sampling ANALOG-TO-DIGITAL CONVERTER
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ADS8322Y/250 bảng dữ liệu(HTML) 3 Page - Texas Instruments

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ADS8322
www.ti.com
SBAS215A – JULY 2001 – REVISED JANUARY 2010
ELECTRICAL CHARACTERISTICS: +VA = +5V
At –40°C to +85°C, +VA = +5V, VREF = +2.5V, fSAMPLE = 500kHz, and fCLK = 20 • fSAMPLE, unless otherwise specified.
ADS8322Y
ADS8322YB(1)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNIT
RESOLUTION
Resolution
16
16
Bits
ANALOG INPUTS
Full-scale input span(2)
+IN – (–IN)
0
+2VREF
0
+2VREF
V
+IN
–0.1
VA + 0.1
–0.1
VA + 0.1
V
Absolute input range
–IN
–0.1
+0.5
–0.1
+0.5
V
Capacitance
25
25
pF
Leakage current
±1
±1
nA
SYSTEM PERFORMANCE
No missing codes
14
15
Bits
Integral linearity error
±4
±8
±3
±6
LSBs(3)
Offset error
±1.0
±2
±0.5
±1.0
mV
Gain error(4)
±0.25
±0.50
±0.22
±0.25
%FSR
Common-mode rejection ratio
At dc
70
70
dB
Noise
60
60
μVRMS
Power-supply rejection ratio
At FFFFh output code
±3
±3
LSBs
SAMPLING DYNAMICS
Conversion time
1.6
1.6
μs
Acquisition time
350
350
ns
Throughput rate
500
500
kHz
Aperture delay
50
50
ns
Aperture jitter
20
20
ps
Small-signal bandwidth
30
30
MHz
Step response
100
100
ns
DYNAMIC CHARACTERISTICS
Total harmonic distortion(5)
VIN = 5VPP at 100kHz
–90
–93
dB
SINAD
VIN = 5VPP at 100kHz
81
83
dB
Spurious free dynamic range
VIN = 5VPP at 100kHz
94
96
dB
REFERENCE OUTPUT
Voltage
IOUT = 0
2.475
2.50
2.525
2.48
2.50
2.52
V
Source current
Static load
10
10
μA
Drift
IOUT = 0
20
20
ppm/°C
Line regulation
4.75V
≤ VCC ≤ 5.25V
0.6
0.6
mV
REFERENCE INPUT
Range
1.5
2.55
1.5
2.55
V
Resistance(6)
To internal reference voltage
10
10
k
Ω
(1)
Shaded cells indicate different specifications from ADS8322Y.
(2)
Ideal input span; does not include gain or offset error.
(3)
LSB means least significant bit, with VREF equal to +2.5V; 1LSB = 76μV.
(4)
Measured relative to an ideal, full-scale input [+In – (–In)] of 4.9999V. Thus, gain error includes the error of the internal voltage
reference.
(5)
Calculated on the first nine harmonics of the input frequency.
(6)
Can vary ±30%.
Copyright © 2001–2010, Texas Instruments Incorporated
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Product Folder Link(s): ADS8322


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