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AD7946 Scheda tecnica(PDF) 3 Page - Analog Devices

Il numero della parte AD7946
Spiegazioni elettronici  16-Bit, /-0.65 LSB INL, 500 kSPS PulSAR Differential ADC in MSOP/QFN
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Produttore elettronici  AD [Analog Devices]
Homepage  http://www.analog.com
Logo AD - Analog Devices

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Preliminary Technical Data
AD7693
Rev. PrB | Page 3 of 24
SPECIFICATIONS
VDD = 4.5 V to 5.5 V, VIO = 2.3 V to VDD, VREF = VDD, all specifications TMIN to TMAX, unless otherwise noted.
Table 2.
Parameter
Conditions/Comments
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−
0
VREF/2
VREF/2 + 0.1
V
Analog Input CMRR
fIN = 250 kHz
65
dB
Leakage Current at 25°C
Acquisition phase
1
nA
Input Impedance1
THROUGHPUT
Conversion Rate
0
500
kSPS
Transient Response
Full-scale step
400
ns
ACCURACY
No Missing Codes
16
Bits
Integral Linearity Error
−0.65
±0.25
+0.65
LSB
Differential Linearity Error
−0.5
±0.2
+0.5
LSB2
Transition Noise
REF = VDD = 5 V
0.16
LSB
Gain Error3
-30
±1.5
+30
LSB
Gain Error Temperature Drift
±0.5
ppm/°C
Zero Error3
−10
+10
LSB
Zero Temperature Drift
±1
ppm/°C
Power Supply Sensitivity
VDD = 5 V
± 5%
±1
ppm
AC ACCURACY
Dynamic Range
VREF = 5 V
96
96.5
dB4
Signal-to-Noise
fIN = 1 kHz, VREF = 5 V
95.5
96
dB
fIN = 1 kHz, VREF = 2.5 V
93
dB
Spurious-Free Dynamic Range
fIN = 1 kHz, VREF = 5 V
−120
dB
Total Harmonic Distortion
fIN = 1 kHz, VREF = 5 V
−120
dB
Signal-to-(Noise + Distortion)
fIN = 1 kHz, VREF = 5 V
95.5
96
dB
Intermodulation Distortion5
TBD
dB
1 See the Analog Inputs section.
2 LSB means least significant bit. With the ±5 V input range, one LSB is 152.6 μV.
3 See the Terminology section. These specifications include full temperature range variation but not the error contribution from the external reference.
4 All specifications in dB are referred to a full-scale input FSR. Tested with an input signal at 0.5 dB below full scale, unless otherwise specified.
5 fIN1 = 21.4 kHz and fIN2 = 18.9 kHz, with each tone at −7 dB below full scale.


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