參數(shù)資料
型號(hào): EVAL-AD7708EB
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(yè)數(shù): 3/44頁(yè)
文件大?。?/td> 339K
代理商: EVAL-AD7708EB
REV. 0
–3–
AD7708/AD7718
Parameter
B Grade
Unit
Test Conditions
AD7718 (CHOP DISABLED)
Output Update Rate
16.06
1.365
24
13
18
See Tables in
ADC Description
±
10
Table VII
Hz min
kHz max
Bits min
Bits p-p
Bits p-p
CHOP = 1
No Missing Codes
2
Resolution
±
20 mV Range, SF = 69
±
2.56 V Range, SF = 69
Output Noise and Update Rates
Integral Nonlinearity
Offset Error
3
ppm of FSR max
μ
V typ
2 ppm Typical
Offset Error is in the order of the noise for the
programmed gain and update rate following a
calibration
Offset Error Drift vs. Temp
4
Full-Scale Error
3
Gain Drift vs. Temp
4
Negative Full-Scale Error
±
200
±
10
±
0.5
±
0.003
nV/
°
C typ
μ
V typ
ppm/
°
C typ
% FSR max
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
DC Input Current
2
DC Bias Current Drift
AINCOM Input Current
DC Input Current
2
DC Bias Current Drift
Normal-Mode Rejection
2
@ 50 Hz
@ 60 Hz
Common-Mode Rejection
@ DC
AIN1–AIN10 and AINCOM with NEGBUF = 1
±
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
REFIN(+) to REFIN(–) Range
2
2.5
1
AV
DD
AGND – 30 mV
AV
DD
+ 30 mV
0.5
±
0.1
V nom
V min
V max
V min
V max
μ
A/V typ
nA/V/
°
C typ
REFIN Refers to Both REFIN1 and REFIN2
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
AD7718 SPECIFICATIONS
1
REFIN(+) = 2.5 V; REFIN(–) = AGND; AGND = DGND = 0 V; XTAL1/XTAL2 = 32.768 kHz Crystal Input Buffer 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,
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