參數(shù)資料
型號： AD7738BRU
廠商： ANALOG DEVICES INC
元件分類： ADC
英文描述： 8-Channel, High Throughput,
中文描述： 8-CH 24-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO28
封裝： MO-153AE, TSSOP-28
文件頁數(shù)： 2/28頁
文件大?。?/td> 407K
代理商： AD7738BRU
REV. 0
–2–
AD7738–SPECIFICATIONS
REFIN(+) = 2.5 V, REFIN(–) = 0 V, AINCOM = 2.5 V, MUXOUT(+) = ADCIN(+), MUXOUT(–) = ADCIN(–), Internal Buffer ON, AIN Range = 1.25 V,
f
MCLK
= 6.144 MHz; unless otherwise noted.)
Parameter
Min
Typ
Max
Unit
Test Conditions/Comment
ADC PERFORMANCE—
CHOPPING ENABLED
Conversion Time Rate
No Missing Codes
1
372
24
12190
Hz
Bits
Configure via Conversion Time Register
FW
≥
6 (Conversion Time
≥
165
μ
s)
See Typical Performance Characteristics
Output Noise
Resolution
Integral Nonlinearity (INL)
See Table I
See Tables II and III
±
0.0015
% of FSR
% of FSR
μ
V
nV/
°
C
%
ppm of FS/ C
% of FSR
ppm of FS/ C
% of FSR
dB
dB
AIN Range =
±
2.5 V
AIN Range =
±
1.25 V
Before Calibration
±
0.0015
±
10
Offset Error (Unipolar, Bipolar)
2
Offset Drift vs. Temperature
1
Gain Error
2
Gain Drift vs. Temperature
1
Positive Full-Scale Error
2
Positive Full-Scale Drift vs. Temperature
1
Bipolar Negative Full-Scale Error
3
Common-Mode Rejection
Power Supply Rejection
±
280
±
0.2
±
2.5
±
0.2
±
2.5
Before Calibration
Before Calibration
±
0.0030
100
80
After Calibration
3
At DC, AIN = 1 V
At DC, AIN = 1 V
80
70
ADC PERFORMANCE—
CHOPPING DISABLED
Conversion Time Rate
No Missing Codes
1
737
24
15437
Hz
Bits
Configure via Conversion Time Register
FW
≥
8 (Conversion Time
≥
117
μ
s)
See Typical Perfomance Charateristics
Output Noise
Resolution
Integral Nonlinearity (INL)
Offset Error (Unipolar, Bipolar)
4
Offset Drift vs. Temperature
Gain Error
2
Gain Drift vs. Temperature
Positive Full-Scale Error
2
Positive Full-Scale Drift vs. Temperature
Bipolar Negative Full-Scale Error
3
Common-Mode Rejection
Power Supply Rejection
See Table IV
See Tables V and VI
±
0.0015
±
1
±
1.5
±
0.2
±
2.5
±
0.2
±
2.5
±
0.0030
75
65
% of FSR
mV
μ
V/ C
%
ppm of FS/ C
% of FSR
ppm of FS/ C
% of FSR
dB
dB
Before Calibration
Before Calibration
Before Calibration
After Calibration
3
At DC, AIN = 1 V
At DC, AIN = 1 V
ANALOG INPUTS
Analog Input Voltage Ranges
1, 5
±
2.5 V Range
+2.5 V Range
±
1.25 V Range
+1.25 V Range
±
0.625 V Range
+0.625 V Range
AIN, AINCOM Common-Mode Voltage
1
0.2
AIN, AINCOM Input Current
6
AIN to MUXOUT On Resistance
1
–2.9
0
–1.45
0
–725
0
±
2.5
0 to 2.5
±
1.25
0 to 1.25 1.45
±
625
0 to 625
+2.9
2.9
+1.45
V
V
V
V
mV
mV
V
nA
+725
725
AV
DD
– 0.3
200
Only One Channel, Chop Disabled
200
REFERENCE INPUT
REFIN(+) to REFIN(–) Voltage
1, 7
NOREF Trigger Voltage
REFIN(+), REFIN(–)
Common-Mode Voltage
1
Reference Input Current
8
2.475
2.5
0.5
2.525
V
V
NOREF Bit in Channel Status Register
0
AV
DD
400
V
μ
A
SYSTEM CALIBRATION
1, 9
Full Scale Calibration Limit
Zero Scale Calibration Limit
Input Span
+1.05 FS
V
V
V
–1.05 FS
0.8 FS
2.1 FS
(–40 C to +105 C, AV
DD
= 5 V 5%, DV
DD
= 2.7 V to 3.6 V or 5 V 5%,
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