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): 3/44頁
文件大?。?/td> 411K
代理商: EVAL-AD7731EB
–3–
REV. 0
AD7731
Parameter
B Version
1
Units
Conditions/Comments
Absolute/Common-Mode Voltage
13
AGND + 1.2 V
AV
DD
– 0.95 V
V min
V max
Reference Input
REF IN(+) – REF IN (–) Voltage
REF IN(+) – REF IN (–) Voltage
Reference DC Input Current
Reference DC Input Current
Absolute/Common-Mode Voltage
14
+2.5
+5
5.5
10
AGND – 30 mV
AV
DD
+ 30 mV
0.3
0.65
V nom
V nom
μ
A max
μ
A max
V min
V max
V min
V max
HIREF Bit of Mode Register = 0
HIREF Bit of Mode Register = 1
HIREF Bit of Mode Register = 0
HIREF Bit of Mode Register = 1
NO REF T rigger Voltage
NO REF Bit Active If VREF Below T his Voltage
NO REF Bit Inactive If VREF Above T his Voltage
LOGIC INPUT S
Input Current
All Inputs Except SCLK and MCLK IN
V
INL
, Input Low Voltage
V
INL
, Input Low Voltage
V
, Input High Voltage
SCLK Only (Schmitt T riggered Input)
V
T +
V
T +
V
T –
V
T –
V
T +
– V
T –
V
T +
– V
T –
MCLK IN Only
V
INL
, Input Low Voltage
V
INL
, Input Low Voltage
V
INH
, Input High Voltage
V
INH
, Input High Voltage
±
10
μ
A max
0.8
0.4
2.0
V max
V max
V min
DV
DD
= +5 V
DV
DD
= +3 V
1.4/3
0.95/2.5
0.8/1.4
0.4/1.1
0.4/0.85
0.4/0.8
V min/V max
V min/V max
V min/V max
V min/V max
V min/V max
V min/V max
DV
DD
= +5 V
DV
DD
= +3 V
DV
DD
= +5 V
DV
DD
= +3 V
DV
DD
= +5 V
DV
DD
= +3 V
0.8
0.4
3.5
2.5
V max
V max
V min
V min
DV
DD
= +5 V
DV
DD
= +3 V
DV
DD
= +5 V
DV
DD
= +3 V
LOGIC OUT PUT S (Including MCLK OUT )
V
OL
, Output Low Voltage
0.4
V max
I
SINK
= 800
μ
A Except for MCLK OUT
15
.
V
DD16
= +5 V
I
SINK
= 100
μ
A Except for MCLK OUT
15
.
V
DD16
= +3 V
I
SOURCE
= 200
μ
A Except for MCLK OUT
15
.
V
DD16
= +5 V
I
SOURCE
= 100
μ
A Except for MCLK OUT
15
.
V
DD16
= +3 V
V
OL
, Output Low Voltage
0.4
V max
V
OH
, Output High Voltage
4.0
V min
V
OH
, Output High Voltage
DV
DD
– 0.6 V
V min
Floating State Leakage Current
Floating State Output Capacitance
3
±
10
6
μ
A max
pF typ
T RANSDUCER BURNOUT
17
AIN1(+) Current
AIN1(–) Current
Initial T olerance @ 25
°
C
Drift
–100
100
±
10
0.1
nA nom
nA nom
% typ
%/
°
C typ
SYST EM CALIBRAT ION
Positive Full-Scale Calibration Limit
18
1.05
×
FS
V max
FS Is the Nominal Full-Scale Voltage (20 mV,
40 mV, 80 mV, 160 mV, 320 mV, 640 mV, 1.28 V)
Negative Full-Scale Calibration Limit
18
Offset Calibration Limit
19
Input Span
19
–1.05
×
FS
–1.05
×
FS
0.8
×
FS
2.1
×
FS
V max
V min
V min
V max
POWER REQUIREMENT S
Power Supply Voltages
AV
DD
– AGND Voltage
DV
DD
Voltage
Power Supply Currents
AV
DD
Current (Normal Mode)
DV
DD
Current (Normal Mode)
DV
DD
Current (Normal Mode)
AV
DD
+ DV
DD
Current (Standby Mode)
Power Dissipation
Normal Mode
Standby Mode
+5
+2.7 to +5.25
V nom
V min to V max
With AGND = 0 V
External MCLK . Digital I/Ps = 0 V or DV
DD
10.3
1.7
3.2
25
mA max
mA max
mA max
μ
A max
DV
DD
of 2.7 V to 3.3 V
DV
DD
of 4.75 V to 5.25 V
T ypically 10
μ
A. External MCLK IN = 0 V or DV
DD
AV
DD
= DV
DD
= +5 V. Digital I/Ps = 0 V or DV
DD
67.5
125
mW max
μ
W max
Typically 50
μ
W. External MCLK IN = 0 V or DV
DD
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