VDD = 2.3 V to 5.5 V, VIO = 2.3 V to VDD, VREF
參數(shù)資料
型號： EVAL-CN0194-SDPZ
廠商： Analog Devices Inc
文件頁數(shù)： 22/28頁
文件大?。?/td> 0K
描述： BOARD CFTL AD7685
設(shè)計資源： CN-0194 CFTL Eval/Design Support
標準包裝： 1
系列： Circuits from the Lab™
主要目的： 參考設(shè)計，隔離式數(shù)據(jù)采集系統(tǒng)
嵌入式： 否
已用 IC / 零件： AD7685，AD8615，ADuM1402
已供物品： 板
AD7685
Rev. C | Page 3 of 28
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
Conditions
Min
Typ
Max
Min
Typ
Max
Min
Typ
Max
Unit
RESOLUTION
16
Bits
ANALOG INPUT
Voltage Range
IN+ IN
0
VREF
0
VREF
0
VREF
V
Absolute Input Voltage
IN+
0.1
VDD +
0.1
VDD +
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
dB
Leakage Current at 25°C
Acquisition phase
1
nA
Input Impedance
See the
See the
See the
ACCURACY
No Missing Codes
15
16
Bits
Differential Linearity Error
1
±0.7
1
±0.5
+1.5
Integral Linearity Error
6
+6
3
±1
+3
2
±0.6
+2
LSB
Transition Noise
REF = VDD = 5 V
0.5
0.45
LSB
Gain Error2, TMIN to TMAX
±2
±30
±2
±30
±2
±15
LSB
Gain Error Temperature Drift
±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
ppm/°C
Power Supply Sensitivity
VDD = 5 V ± 5%
±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
μs
AC ACCURACY
Signal-to-Noise Ratio
fIN = 20 kHz,
VREF = 5 V
90
92
91.5
93.5
dB3
fIN = 20 kHz,
VREF = 2.5 V
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.
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