參數(shù)資料
型號： EVAL-AD7718EB
廠商： Analog Devices, Inc.
英文描述： 8-/10-Channel, Low Voltage, Low Power, ADCs
中文描述： 8-/10-Channel，低電壓，低功耗，ADC的
文件頁數(shù)： 6/44頁
文件大?。?/td> 339K
代理商： EVAL-AD7718EB
REV. 0
–6–
AD7708/AD7718
AD7708 SPECIFICATIONS
1
REFIN(+) = 2.5 V; REFIN(–) = AGND; AGND = DGND = 0 V; XTAL1/XTAL2 = 32.768 kHz Crystal Input Buffers Enabled. All specifications T
MIN
to
T
MAX
unless otherwise noted.)
(AV
DD
= 2.7 V to 3.6 V or 4.75 V to 5.25 V, DV
DD
= 2.7 V to 3.6 V or 4.75 V to 5.25 V,
Parameter
B Grade
Unit
Test Conditions
AD7708 (CHOP DISABLED)
Output Update Rate
16.06
1.365
16
13
16
See Tables in ADC Description
±
15
±
0.65
±
200
±
0.75
±
0.5
±
0.003
Hz min
kHz max
Bits min
Bits p-p
Bits p-p
CHOP
= 1
No Missing Codes
2
Resolution
±
20 mV Range, SF Word = 69
±
2.56 V Range, SF Word = 69
Output Noise and Update Rates
Integral Nonlinearity
Offset Error
3
Offset Error Drift vs. Temp
4
Full-Scale Error
3
Gain Drift vs. Temp
4
Negative Full-Scale Error
ppm of FSR max
LSB typ
nV/
°
C typ
LSB typ
ppm/
°
C typ
% FSR typ
2ppm Typical
Following a Self-Calibration
ANALOG INPUTS
Differential Input Full-Scale Voltage
±
1.024
×
REFIN/GAIN
V nom
REFIN Refers to Both REFIN1 and
REFIN2. REFIN = REFIN(+) – REFIN(–)
GAIN = 1 to 128
AIN1–AIN10 and AINCOM with
NEGBUF = 1
NEGBUF = 0
Absolute AIN Voltage Limits
AGND + 100 mV
AV
DD
– 100 mV
AGND – 30 mV
AV
DD
+ 30 mV
V min
V max
V min
V max
Absolute AINCOM Voltage Limits
Analog Input Current
AIN1–AIN10 and AINCOM with
NEGBUF = 1
DC Input Current
2
DC Bias Current Drift
AINCOM Input Current
DC Input Current
DC Bias Current Drift
Normal-Mode Rejection
2
@ 50 Hz
@ 60 Hz
Common-Mode Rejection
@ DC
±
1
±
5
nA max
pA/
°
C typ
NEGBUF = 0
±
2.56 V Range
±
125
±
2
nA/V typ
pA/V/
°
C typ
100
100
dB min
dB min
50 Hz
±
1 Hz, SF Word = 82
60 Hz
±
1 Hz, SF Word = 68
90
dB min
100 dB typ, Analog Input = 1 V,
Input Range =
±
2.56 V
110 dB typ on
±
20 mV Range
50 Hz
±
1 Hz, SF Word = 82
60 Hz
±
1 Hz, SF Word = 68
@ 50 Hz
@ 60 Hz
100
100
dB typ
dB typ
REFERENCE INPUTS (REFIN1 AND REFIN2)
REFIN(+) to REFIN(–) Voltage
2.5
V nom
REFIN Refers to Both REFIN1 and
REFIN2
REFIN(+) to REFIN(–) Range
2
1
AV
DD
AGND – 30 mV
AV
DD
+ 30 mV
0.5
±
0.1
V min
V max
V min
V max
μ
A/V typ
nA/V/
°
C typ
REFIN Common-Mode Range
Reference DC Input Current
Reference DC Input Current Drift
Normal-Mode Rejection
2
@ 50 Hz
@ 60 Hz
Common-Mode Rejection
@ DC
@ 50 Hz
@ 60 Hz
100
100
dB min
dB min
50 Hz
±
1 Hz, SF Word = 82
60 Hz
±
1 Hz, SF Word = 68
Input Range =
±
2.56 V
Analog Input = 1 V. Input Range =
±
2.56 V
100
100
100
dB typ
dB typ
dB typ
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