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AD7949 Datasheet(PDF) 3 Page - Analog Devices

No. de pieza AD7949
Descripción Electrónicos  16-Bit, 8-Channel, 250 kSPS PulSAR짰 ADC.
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Fabricante Electrónico  AD [Analog Devices]
Página de inicio  http://www.analog.com
Logo AD - Analog Devices

AD7949 Datasheet(HTML) 3 Page - Analog Devices

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Preliminary Technical Data
AD7689
Rev. PrC | Page 3 of 20
SPECIFICATIONS
VDD = 2.5 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
16
Bits
ANALOG INPUT
Voltage Range
Unipolar mode
0
+VREF
V
Bipolar mode
−VREF/2
+VREF/2
Absolute Input Voltage
Positive input, unipolar and
bipolar mode
−0.1
VREF + 0.1
V
Negative or COM input, unipolar
mode
−0.1
+0.1
Negative or COM input, bipolar
mode
VREF/2 – 0.1
VREF/2
VREF/2 + 0.1
Analog Input CMRR
fIN = 250 kHz
TBD
dB
Leakage Current at 25°C
Acquisition phase
1
nA
Input Impedance1
THROUGHPUT
Conversion Rate
VDD = 4.096V to 5.5
0
250
kSPS
VDD = 2.5V to 4.096V
1
200
Transient Response
Full-scale step
1.8
μs
ACCURACY
No Missing Codes
16
Bits
Integral Linearity Error
-2
±0.6
+2
LSB2
Differential Linearity Error
−1
±0.25
+1.5
LSB
Transition Noise
REF = VDD = 5 V
0.5
LSB
Gain Error3
−30
±0.5
+30
LSB
Gain Error Match
TBD
LSB
Gain Error Temperature Drift
±0.3
ppm/°C
Offset Error3
−5
±0.5
+5
LSB
Offset Error Match
TBD
LSB
Offset Error Temperature Drift
±0.3
ppm/°C
Power Supply Sensitivity
VDD = 5 V
± 5%
±1
ppm
AC ACCURACY4
Dynamic Range
93.5
dB5
Signal-to-Noise
fIN = 20 kHz, VREF = 5V
92.5
dB
fIN = 20 kHz, VREF = 2.5V
88.5
Signal-to-(Noise + Distortion)
fIN = 20 kHz, VREF = 5V
92.5
dB
fIN = 20 kHz, VREF = 2.5V
88.5
dB
Total Harmonic Distortion
fIN = 20 kHz
−100
dB
Spurious-Free Dynamic Range
fIN = 20 kHz
110
dB
Channel-to-Channel Crosstalk
fIN = 100 kHz on adjacent
channel(s)
-117
dB
Intermodulation Distortion6
115
dB
SAMPLING DYNAMICS
−3 dB Input Bandwidth
Selectable
0.425
1.7
MHz
Aperture Delay
VDD = 5V
2.5
ns
1 See the Analog Inputs section.
2 LSB means least significant bit. With the 5 V input range, one LSB is 76.3 μV.
3 See the Terminology section. These specifications include full temperature range variation but not the error contribution from the external reference.
4 With VREF = 5 V, unless otherwise noted.
5 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.
6 fIN1 = 21.4 kHz and fIN2 = 18.9 kHz, with each tone at −7 dB below full scale.


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