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AD7982BRMZ bảng dữ liệu(PDF) 3 Page - Analog Devices

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AD7982BRMZ bảng dữ liệu(HTML) 3 Page - Analog Devices

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AD7982
Rev. A | Page 3 of 24
SPECIFICATIONS
VDD = 2.5 V, VIO = 2.3 V to 5.5 V, REF = 5 V, TA = −40°C to +85°C, unless otherwise noted.
Table 2.
Parameter
Conditions
Min
Typ
Max
Unit
RESOLUTION
18
Bits
ANALOG INPUT
Voltage Range
IN+ − IN−
−VREF
+VREF
V
Absolute Input Voltage
IN+, IN−
−0.1
VREF + 0.1
V
Common-Mode Input Range
IN+, IN−
VREF × 0.475
VREF × 0.5
VREF × 0.525
V
Analog Input CMRR
fIN = 450 kHz
67
dB
Leakage Current at 25°C
Acquisition phase
200
nA
Input Impedance
See the Analog Input
s section
ACCURACY
No Missing Codes
18
Bits
Differential Linearity Error
−0.85
±0.5
+1.5
LSB1
Integral Linearity Error
−2
±1
+2
LSB1
Transition Noise
REF = 5 V
1.05
LSB1
Gain Error, TMIN to TMAX2
−0.023
+0.004
+0.023
% of FS
Gain Error Temperature Drift
±1
ppm/°C
Zero Error, TMIN to TMAX2
±100
+700
μV
Zero Temperature Drift
0.5
ppm/°C
Power Supply Rejection Ratio
VDD = 2.5 V ± 5%
90
dB
THROUGHPUT
Conversion Rate
0
1
MSPS
Transient Response
Full-scale step
290
ns
AC ACCURACY
Dynamic Range
VREF = 5 V
97
99
dB3
VREF = 2.5 V
93
dB3
Oversampled Dynamic Range4
FO = 1 kSPS
129
dB3
Signal-to-Noise
fIN = 1 kHz, VREF = 5 V, TA = 25°C
95.5
98
dB3
fIN = 1 kHz, VREF = 2.5 V, TA = 25°C
92.5
dB3
Spurious-Free Dynamic Range
fIN = 10 kHz
−115
dB3
Total Harmonic Distortion5
fIN = 10 kHz
−120
dB3
Signal-to-(Noise + Distortion)
fIN = 1 kHz, VREF = 5 V, TA = 25°C
97
dB3
1 LSB means least significant bit. With the ±5 V input range, 1 LSB is 38.15 μV.
2 See Terminology section. These specifications include full temperature range variation but not the error contribution from the external reference.
3 All specifications expressed in decibels are referred to a full-scale input FSR and tested with an input signal at 0.5 dB below full scale, unless otherwise specified.
4 Dynamic range is obtained by oversampling the ADC running at a throughput Fs of 1 MSPS followed by postdigital filtering with an output word rate of FO.
5 Tested fully in production at fIN = 1 kHz.


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