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AD7685 Scheda tecnica(PDF) 3 Page - Analog Devices

Il numero della parte AD7685
Spiegazioni elettronici  16-Bit, 250 kSPS PulSAR
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Produttore elettronici  AD [Analog Devices]
Homepage  http://www.analog.com
Logo AD - Analog Devices

AD7685 Scheda tecnica(HTML) 3 Page - Analog Devices

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Data Sheet
AD7685
SPECIFICATIONS
VDD = 2.3 V to 5.5 V, VIO = 2.3 V to VDD, VREF = VDD, TA = –40°C to +85°C, unless otherwise noted.
Table 2.
A Grade
B Grade
C Grade
Parameter
Test Conditions
Min
Typ
Max
Min
Typ
Max
Min
Typ
Max
Unit
RESOLUTION
16
16
16
Bits
ANALOG INPUT
Voltage Range
IN+ − IN−
0
VREF
0
VREF
0
VREF
V
Absolute Input Voltage
IN+
−0.1
VDD +
0.1
−0.1
VDD +
0.1
−0.1
VDD +
0.1
V
IN−
−0.1
+0.1
−0.1
+0.1
−0.1
+0.1
V
Analog Input CMRR
fIN = 250 kHz
65
65
65
dB
Leakage Current at 25°C
Acquisition phase
1
1
1
nA
Input Impedance
See the
Analog Inputs section
See the
Analog Inputs section
See the
Analog Inputs section
ACCURACY
No Missing Codes
15
16
16
Bits
Differential Linearity Error
−1
±0.7
−1
±0.5
+1.5
LSB1
Integral Linearity Error
−6
+6
−3
±1
+3
−2
±0.6
+2
LSB
Transition Noise
REF = VDD = 5 V
0.5
0.5
0.45
LSB
Gain Error2, TMIN to TMAX
±2
±30
±2
±30
±2
±15
LSB
Gain Error Temperature Drift
±0.3
±0.3
±0.3
ppm/°C
Offset Error2, TMIN to TMAX
VDD = 4.5 V to 5.5 V
±0.1
±1.6
±0.1
±1.6
±0.1
±1.6
mV
VDD = 2.3 V to 4.5 V
±0.7
±3.5
±0.7
±3.5
±0.7
±3.5
mV
Offset Temperature Drift
±0.3
±0.3
±0.3
ppm/°C
Power Supply Sensitivity
VDD = 5 V ± 5%
±0.05
±0.05
±0.05
LSB
THROUGHPUT
Conversion Rate
VDD = 4.5 V to 5.5 V
0
250
0
250
0
250
kSPS
VDD = 2.3 V to 4.5 V
0
200
0
200
0
200
kSPS
Transient Response
Full-scale step
1.8
1.8
1.8
µs
AC ACCURACY
Signal-to-Noise Ratio
fIN = 20 kHz,
VREF = 5 V
90
90
92
91.5
93.5
dB3
fIN = 20 kHz,
VREF = 2.5 V
86
86
88
87.5
88.5
dB
Spurious-Free Dynamic
Range
fIN = 20 kHz
−100
−106
−110
dB
Total Harmonic Distortion
fIN = 20 kHz
−100
−106
−110
dB
Signal-to-(Noise + Distortion)
fIN = 20 kHz,
VREF = 5 V
89
90
92
91.5
93.5
dB
fIN = 20 kHz,
VREF = 5 V,
−60 dB input
32
33.5
dB
fIN = 20 kHz,
VREF = 2.5 V
86
85.5
87.5
87
88.5
dB
Intermodulation Distortion4
−110
−115
dB
1
LSB means least significant bit. With the 5 V input range, 1 LSB is 76.3 µV.
2
See Terminology section. These specifications do include full temperature range variation but do not include the error contribution from the external reference.
3
All specifications in dB are referred to a full-scale input FS. Tested with an input signal at 0.5 dB below full-scale, unless otherwise specified.
4
fIN1 = 21.4 kHz, fIN2 = 18.9 kHz, each tone at −7 dB below full scale.
Rev. D | Page 3 of 28


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