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AD7643 Datasheet(PDF) 3 Page - Analog Devices

Part # AD7643
Description  18-Bit, 5 MSPS PulSAR Differential ADC
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD7643 Datasheet(HTML) 3 Page - Analog Devices

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Data Sheet
AD7960
Rev. 0 | Page 3 of 24
SPECIFICATIONS
VDD1 = 5 V; VDD2 = 1.8 V; VIO = 1.8 V; REF = 4.096 V; all specifications TMIN to TMAX, unless otherwise noted.
Table 2.
Parameter
Test Conditions/Comments
Min
Typ
Max
Unit
RESOLUTION
18
Bits
ANALOG INPUT
Voltage Range
VIN+ − VIN−
−VREF
+VREF
V
Operating Input Voltage
VIN+, VIN− to GND
−0.1
VREF + 0.1
V
Common-Mode Input Range1
VREF/2 − 0.05
VREF/2
VREF/2 + 0.05
V
CMRR
fIN = 500 kHz
70
dB
Input Leakage Current
Acquisition phase
60
nA
THROUGHPUT
Complete Cycle
200
ns
Throughput Rate
0
5
MSPS
DC ACCURACY
No Missing Codes
18
Bits
Integral Linearity Error
−2
±0.8
+2
LSB
Differential Linearity Error
−0.99
±0.5
+0.99
LSB
Transition Noise
1.1
LSB
Zero Error
−6
+6
LSB
Zero Error Drift1
−0.25
±0.01
+0.25
ppm/°C
Gain Error
−30
±5
+30
LSB
Gain Error Drift1
−0.5
±0.05
+0.5
ppm/°C
Power Supply Sensitivity2
VDD1 = 5 V ± 5%
±1
LSB
VDD2 = 1.8 V ± 5%
±2
LSB
AC ACCURACY
fIN = 1 kHz, −0.5 dBFS, VREF = 5 V
Dynamic Range
98
100
dB
Signal-to-Noise Ratio
97
99
dB
Spurious-Free Dynamic Range
119
dB
Total Harmonic Distortion
−117
dB
Signal-to-Noise-and-Distortion Ratio
96.5
98.5
dB
fIN = 1 kHz, −0.5 dBFS, VREF = 4.096 V
Dynamic Range
97
98.5
dB
Signal-to-Noise Ratio
95
97
dB
Spurious-Free Dynamic Range
115
dB
Total Harmonic Distortion
−113
dB
Signal-to-Noise-and-Distortion Ratio
94.5
96.5
dB
−3 dB Input Bandwidth3
EN2 = 0
28
MHz
REFERENCE BUFFER
REFIN Input Voltage Range1
2.042
2.048
2.054
V
REF Output Voltage Range
REF at 25°C, EN3 to EN0 =
XX01 or XX10
4.086
4.096
4.106
V
Line Regulation
VDD1 = 5 V ± 5%, VDD2 =
1.8 V ± 5%
±20
µV
Gain Drift1
−25
±4
+25
ppm/°C
EXTERNAL REFERENCE
Voltage Range
REFIN pin, EN1 to EN0 = 01
2.048
V
REF pin, EN1 to EN0 = 104
4.096
V
REF pin, EN1 to EN0 = 014
5
V
Current Drain
5 MSPS, REF = 4.096 V
1.05
1.11
mA
5 MSPS, REF = 5 V
1.36
1.43
mA


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