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AD7708BRU 数据表(PDF) 7 Page - Analog Devices

部件名 AD7708BRU
功能描述  8-/10-Channel, Low Voltage, Low Power, ADCs
Download  44 Pages
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制造商  AD [Analog Devices]
网页  http://www.analog.com
标志 AD - Analog Devices

AD7708BRU 数据表(HTML) 7 Page - Analog Devices

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REV. 0
–7–
AD7708/AD7718
Parameter
B Grade
Unit
Test Conditions
AD7708 (CHOP ENABLED)
Output Update Rate
5.4
Hz min
CHOP = 1
105
Hz max
0.732 ms Increments
No Missing Codes
2
16
Bits min
20 Hz Update Rate
Resolution
13
Bits p-p
±20 mV Range, 20 Hz Update Rate
16
Bits p-p
±2.56 V Range, 20 Hz Update Rate
Output Noise and Update Rates
See Tables in
ADC Description
Integral Nonlinearity
±15
ppm of FSR max
2 ppm Typical
Offset Error
3
±3
µV typ
Calibration is Accurate to
±0.5 LSB
Offset Error Drift vs. Temp
4
10
nV/
°C typ
Full-Scale Error
3
±0.75
LSB typ
Includes Positive and Negative ERRORS
Gain Drift vs. Temp
4
±0.5
ppm/
°C typ
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
Range Matching
±2
µV typ
Analog Input = 18 mV
Absolute AIN Voltage Limits
AGND + 100 mV
V min
AIN1–AIN10 and AINCOM with
AVDD – 100 mV
V max
NEGBUF = 1
Absolute AINCOM Voltage Limits
AGND – 30 mV
V min
NEGBUF = 0
AVDD + 30 mV
V max
Analog Input Current
AIN1–AIN10 and AINCOM with
NEGBUF = 1
DC Input Current
2
±1
nA max
DC Input Current Drift
±5
pA/
°C typ
AINCOM Input Current
NEGBUF = 0
DC Input Current
2
±125
nA/V typ
DC Bias Current Drift
±2
pA/V/
°C typ
Normal-Mode Rejection
2
@ 50 Hz
100
dB min
50 Hz
± 1 Hz, SF Word = 82
@ 60 Hz
94
dB min
60 Hz
± 1 Hz, SF Word = 68
Common-Mode Rejection
@ DC
90
dB min
100 dB typ, Analog Input = 1 V,
Input Range =
±2.56 V
110 dB typ on
±20 mV Range
@ 50 Hz
2
100
dB min
50 Hz
± 1 Hz, 20 Hz Update Rate
@ 60 Hz
2
100
dB min
60 Hz
± 1 Hz, 20 Hz Update Rate
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
1V min
AVDD
V max
REFIN Common-Mode Range
AGND – 30 mV
V min
AVDD + 30 mV
V max
Reference DC Input Current
2
±0.5
µA/V typ
Reference DC Input Current Drift
±0.01
nA/V/
°C typ
Normal-Mode Rejection
2
@ 50 Hz
100
dB min
50 Hz
± 1 Hz, SF Word = 82
@ 60 Hz
100
dB min
60 Hz
± 1 Hz, SF Word = 68
Common-Mode Rejection
Input Range =
±2.56 V
@ DC
110
dB typ
Analog Input = 1 V
@ 50 Hz
110
dB typ
50 Hz
± 1 Hz, 20 Hz Update Rate
@ 60 Hz
110
dB typ
60 Hz
± 1 Hz, 20 Hz Update Rate
LOGIC INPUTS
5
All Inputs Except SCLK and XTAL1
2
VINL, Input Low Voltage
0.8
V max
DVDD = 5 V
0.4
V max
DVDD = 3 V
VINH, Input High Voltage
2.0
V min
DVDD = 3 V or 5 V


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