參數(shù)資料
型號： EVAL-AD7731EB
廠商： Analog Devices, Inc.
英文描述： Low Noise, High Throughput 24-Bit Sigma-Delta ADC
中文描述： 低噪聲，高吞吐量的24位Σ-Δ模數(shù)轉(zhuǎn)換器
文件頁數(shù)： 2/44頁
文件大?。?/td> 411K
代理商： EVAL-AD7731EB
–2–
REV. 0
AD7731–SPECIFICATIONS
Parameter
B Version
1
Units
Conditions/Comments
ST AT IC PERFORMANCE (CHP = 0)
No Missing Codes
2
Output Noise and Update Rates
2
Integral Nonlinearity
Offset Error
2
Offset Drift vs. T emperature
2
24
See T ables I and II
15
See Note 4
0.5
1/2/5
2.5
See Note 4
0.6
1.5/3/6
3
See Note 4
2
10
See Note 4
1
90
60
Bits min
SK IP = 0
3
ppm of FSR max
Offset Error and Offset Drift Refer to Both
Input Range = 20 mV, 40 mV, 80 mV, 160 mV
Input Range = 320 mV/640 mV/1.28 V
μ
V/
°
C typ
μ
V/
°
C typ
μ
V/1000 Hr
Offset Drift vs. T ime
5
Positive Full-Scale Error
2, 6
Positive Full-Scale Drift vs. T emp
2, 7, 8
μ
V/
°
C typ
μ
V/
°
C typ
μ
V/1000 Hr
Input Range = 20 mV, 40 mV, 80 mV, 160 mV
Input Range = 320 mV/640 mV/1.28 V
Positive Full-Scale Drift vs. T ime
5
Gain Error
2, 9
Gain Drift vs. T emperature
2, 7, 10
Gain Drift vs. T ime
5
Bipolar Negative Full-Scale Error
2
Negative Full-Scale Drift vs. T emp
2, 7
Power Supply Rejection
11
Power Supply Rejection
11
Common-Mode Rejection (CMR)
11
On AIN
On AIN
On REF IN
Analog Input DC Bias Current
2
Analog Input DC Bias Current Drift
2
Analog Input DC Offset Current
2
Analog Input DC Offset Current Drift
2
ppm/
°
C typ
ppm/1000 Hr
μ
V/
°
C typ
dB typ
dB typ
Input Range = 20 mV
Input Range = 1.28 V
95
85
120
60
150
30
100
dB typ
dB typ
dB typ
nA max
pA/
°
C typ
nA max
pA/
°
C typ
At DC. Input Range = 20 mV
At DC. Input Range = 1.28 V
ST AT IC PERFORMANCE (CHP = 1)
2
No Missing Codes
Output Noise and Update Rates
Integral Nonlinearity
Offset Error
Offset Drift vs. T emperature
Offset Drift vs. T ime
5
Positive Full-Scale Error
6
Positive Full-Scale Drift vs. T emp
7, 8
Positive Full-Scale Drift vs. T ime
5
Gain Error
9
Gain Drift vs. T emperature
7, 10
Gain Drift vs. T ime
5
Bipolar Negative Full-Scale Error
Negative Full-Scale Drift vs. T emp
Power Supply Rejection
11
Power Supply Rejection
11
Common-Mode Rejection (CMR)
11
On AIN
On AIN
On REF IN
Analog Input DC Bias Current
Analog Input DC Bias Current Drift
Analog Input DC Offset Current
Analog Input DC Offset Current Drift
24
See T ables III and IV
15
See Note 4
5
25
See Note 4
2
10
See Note 4
2
10
See Note 4
2
110
85
Bits min
ppm of FSR max
Offset Error and Offset Drift Refer to Both
Unipolar Offset and Bipolar Zero Errors
nV/
°
C typ
nV/1000 Hr typ
ppm of FS/
°
C max
ppm of FS/1000 Hr
ppm/
°
C max
ppm/1000 Hr
ppm of FS/
°
C max
dB typ
dB typ
Input Range = 20 mV
Input Range = 1.28 V
110
85
120
50
100
10
50
dB typ
dB typ
dB typ
nA max
pA/
°
C typ
nA max
pA/
°
C typ
At DC. Input Range = 20 mV
At DC. Input Range = 1.28 V
ANALOG INPUT S/REFERENCE INPUT S
Normal Mode 50 Hz/60 Hz Rejection
2
Common-Mode 50 Hz/60 Hz Rejection
2
Analog Inputs
Differential Input Voltage Ranges
12
88
120
dB min
dB min
50 Hz/60 Hz
±
1 Hz. SK IP = 0
50 Hz/60 Hz
±
1 Hz. SK IP = 0
Assuming 2.5 V or 5 V Reference with HIREF
Bit Set Appropriately
RN2, RN1, RN0 of Mode Register = 0, 0, 1
RN2, RN1, RN0 of Mode Register = 0, 1, 0
RN2, RN1, RN0 of Mode Register = 0, 1, 1
RN2, RN1, RN0 of Mode Register = 1, 0, 0
RN2, RN1, RN0 of Mode Register = 1, 0, 1
RN2, RN1, RN0 of Mode Register = 1, 1, 0
RN2, RN1, RN0 of Mode Register = 1, 1, 1
0 to +20 or
±
20
0 to +40 or
±
40
0 to +80 or
±
80
0 to +160 or
±
160
0 to +320 or
±
320
0 to +640 or
±
640
0 to +1.28 or
±
1.28
mV nom
mV nom
mV nom
mV nom
mV nom
mV nom
V nom
(AV
DD
= +5V, DV
DD
= +3V or +5V; REF IN+) = +2.5V; REFIN–) = AGND; AGND =
DGND = 0V; f
CLK IN
= 4.9152MHz. All specifications T
MN
to T
MAX
unless otherwse noted.)
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