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AD7731BRU 数据表(PDF) 2 Page - Analog Devices

部件名 AD7731BRU
功能描述  Low Noise, High Throughput 24-Bit Sigma-Delta ADC
Download  44 Pages
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制造商  AD [Analog Devices]
网页  http://www.analog.com
标志 AD - Analog Devices

AD7731BRU 数据表(HTML) 2 Page - Analog Devices

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REV. 0
AD7731–SPECIFICATIONS
Parameter
B Version
1
Units
Conditions/Comments
STATIC PERFORMANCE (CHP = 0)
No Missing Codes
2
24
Bits min
SKIP = 0
3
Output Noise and Update Rates
2
See Tables I and II
Integral Nonlinearity
15
ppm of FSR max
Offset Error
2
See Note 4
Offset Error and Offset Drift Refer to Both
Offset Drift vs. Temperature
2
0.5
µV/°C typ
Input Range = 20 mV, 40 mV, 80 mV, 160 mV
1/2/5
µV/°C typ
Input Range = 320 mV/640 mV/1.28 V
Offset Drift vs. Time
5
2.5
µV/1000 Hr
Positive Full-Scale Error
2, 6
See Note 4
Positive Full-Scale Drift vs. Temp
2, 7, 8
0.6
µV/°C typ
Input Range = 20 mV, 40 mV, 80 mV, 160 mV
1.5/3/6
µV/°C typ
Input Range = 320 mV/640 mV/1.28 V
Positive Full-Scale Drift vs. Time
5
3
µV/1000 Hr
Gain Error
2, 9
See Note 4
Gain Drift vs. Temperature
2, 7, 10
2
ppm/
°C typ
Gain Drift vs. Time
5
10
ppm/1000 Hr
Bipolar Negative Full-Scale Error
2
See Note 4
Negative Full-Scale Drift vs. Temp
2, 7
1
µV/°C typ
Power Supply Rejection
11
90
dB typ
Input Range = 20 mV
Power Supply Rejection
11
60
dB typ
Input Range = 1.28 V
Common-Mode Rejection (CMR)
11
On AIN
95
dB typ
At DC. Input Range = 20 mV
On AIN
85
dB typ
At DC. Input Range = 1.28 V
On REF IN
120
dB typ
Analog Input DC Bias Current
2
60
nA max
Analog Input DC Bias Current Drift
2
150
pA/
°C typ
Analog Input DC Offset Current
2
30
nA max
Analog Input DC Offset Current Drift
2
100
pA/
°C typ
STATIC PERFORMANCE (CHP = 1)
2
No Missing Codes
24
Bits min
Output Noise and Update Rates
See Tables III and IV
Integral Nonlinearity
15
ppm of FSR max
Offset Error
See Note 4
Offset Error and Offset Drift Refer to Both
Offset Drift vs. Temperature
5
nV/
°C typ
Unipolar Offset and Bipolar Zero Errors
Offset Drift vs. Time
5
25
nV/1000 Hr typ
Positive Full-Scale Error
6
See Note 4
Positive Full-Scale Drift vs. Temp
7, 8
2
ppm of FS/
°C max
Positive Full-Scale Drift vs. Time
5
10
ppm of FS/1000 Hr
Gain Error
9
See Note 4
Gain Drift vs. Temperature
7, 10
2
ppm/
°C max
Gain Drift vs. Time
5
10
ppm/1000 Hr
Bipolar Negative Full-Scale Error
See Note 4
Negative Full-Scale Drift vs. Temp
2
ppm of FS/
°C max
Power Supply Rejection
11
110
dB typ
Input Range = 20 mV
Power Supply Rejection
11
85
dB typ
Input Range = 1.28 V
Common-Mode Rejection (CMR)
11
On AIN
110
dB typ
At DC. Input Range = 20 mV
On AIN
85
dB typ
At DC. Input Range = 1.28 V
On REF IN
120
dB typ
Analog Input DC Bias Current
50
nA max
Analog Input DC Bias Current Drift
100
pA/
°C typ
Analog Input DC Offset Current
10
nA max
Analog Input DC Offset Current Drift
50
pA/
°C typ
ANALOG INPUTS/REFERENCE INPUTS
Normal Mode 50 Hz/60 Hz Rejection
2
88
dB min
50 Hz/60 Hz
±1 Hz. SKIP = 0
Common-Mode 50 Hz/60 Hz Rejection
2
120
dB min
50 Hz/60 Hz
±1 Hz. SKIP = 0
Analog Inputs
Differential Input Voltage Ranges
12
Assuming 2.5 V or 5 V Reference with HIREF
Bit Set Appropriately
0 to +20 or
±20
mV nom
RN2, RN1, RN0 of Mode Register = 0, 0, 1
0 to +40 or
±40
mV nom
RN2, RN1, RN0 of Mode Register = 0, 1, 0
0 to +80 or
±80
mV nom
RN2, RN1, RN0 of Mode Register = 0, 1, 1
0 to +160 or
±160
mV nom
RN2, RN1, RN0 of Mode Register = 1, 0, 0
0 to +320 or
±320
mV nom
RN2, RN1, RN0 of Mode Register = 1, 0, 1
0 to +640 or
±640
mV nom
RN2, RN1, RN0 of Mode Register = 1, 1, 0
0 to +1.28 or
±1.28
V nom
RN2, RN1, RN0 of Mode Register = 1, 1, 1
(AVDD = +5 V, DVDD = +3 V or +5 V; REF IN(+) = +2.5 V; REF IN(–) = AGND; AGND =
DGND = 0 V; fCLK IN = 4.9152 MHz. All specifications TMIN to TMAX unless otherwise noted.)
REV. A


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