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參數(shù)資料
| 型號： | EVAL-AD7719EB |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Connector Backshell |
| 中文描述： | 低電壓，低功耗，工廠校準，16-/24-Bit雙ADC |
| 文件頁數(shù)： | 6/40頁 |
| 文件大小： | 367K |
| 代理商： | EVAL-AD7719EB |
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REV. 0
AD7719
–6–
Parameter
AD7719B
Unit
Test Conditions
Power Supply Currents (Continued)
AI
DD
Current (Main ADC)
1.1
mA max
AV
DD
= 3 V or 5 V, Buffered Mode,
0.85 mA typ
AV
DD
= 3 V or 5 V, Unbuffered Mode,
0.45 mA typ
AV
DD
= 3 V or 5 V, 0.25 mA typ
AV
DD
= 3 V or 5 V, Main ADC Buffered,
1 mA typ
DV
DD
= 3 V, 0.25 mA typ
DV
DD
= 5 V, 0.3 mA typ
AV
DD
= 3 V or 5 V
DV
DD
= 3 V, 32.768 kHz Osc. Running
DV
DD
= 3 V, Oscillator Powered Down
DV
DD
= 5 V, 32.768 kHz Osc. Running
DV
DD
= 5 V, Oscillator Powered Down
AV
DD
= 3 V or 5 V
0.55
mA max
AI
DD
Current (Aux ADC)
AI
DD
Current (Main and Aux ADC)
0.3
1.25
mA max
mA max
DI
DD
(ADC Disable Mode)
13
0.35
0.4
0.15
10
2
30
8
1
mA max
mA max
mA max
μ
A max
μ
A max
μ
A max
μ
A max
μ
A max
AI
DD
(ADC Disable Mode)
DI
DD
(Power-Down Mode)
AI
DD
(Power-Down Mode)
NOTES
1
Temperature Range
–
40
°
C to +85
°
C.
2
Guaranteed by design and/or characterization data on production release.
3
System zero calibration will remove this error.
4
A calibration at any temperature will remove this drift error.
5
The Main ADC is factory-calibrated with AV
DD
= DV
DD
= 4 V, T
A
= 25
°
C, REFIN1(+)
–
REFIN1(
–
) = 2.5 V. If the user power supplies or temperature conditions
are significantly different from these, internal full-scale calibration will restore this error to the published specification. System calibration can be used to reduce this
error to the order of the noise. Full scale error applies to both positive and negative full scale.
6
Simultaneous 50 Hz and 60 Hz rejection is achieved using 19.8 Hz (SF = 69) update rate. Normal mode rejection in this case is 60 dB min.
7
Input and Output levels on the I/O Port are with respect to AV
DD
and AGND.
8
A system full-scale calibration will remove this error.
9
A typical gain error of
±
10
μ
V results following a user self calibration.
10
After a calibration if the analog input exceeds positive full scale, the converter will output all 1s. If the analog input is less than negative full scale then the device will
output all 0s.
11
FS = Full-Scale Input. FS = 1.024
×
REFIN1/Gain on the Main ADC, where REFIN1 = REFIN1(+)
–
REFIN1(
–
). FS = REFIN2 on the aux ADC when ARN = 1
in the aux ADC control register (AD1CON) and REFIN2/2 on the aux ADC when ARN = 0.
12
Normal Mode refers to the case where both main and aux ADCs are running.
13
ADC disable is entered by setting both the AD0EN and AD1EN bits in the Main and Aux ADC control registers to a 0 and setting the mode bits (MD2, MD1,
MD0) in the Mode register to non-0.
Specifications subject to change without notice.
ABSOLUTE MAXIMUM RATINGS
1
(T
A
= 25
°
C unless otherwise noted)
AV
DD
to AGND . . . . . . . . . . . . . . . . . . . . . . .
–
0.3 V to +7 V
AV
DD
to DGND . . . . . . . . . . . . . . . . . . . . . . .
–
0.3 V to +7 V
DV
DD
to AGND . . . . . . . . . . . . . . . . . . . . . . .
–
0.3 V to +7 V
DV
DD
to DGND . . . . . . . . . . . . . . . . . . . . . . .
–
0.3 V to +7 V
AGND to DGND
2
. . . . . . . . . . . . . . . . . . .
–
20 mV to +20 mV
PWRGND to AGND . . . . . . . . . . . . . . . .
–
20 mV to +20 mV
AV
DD
to DV
DD
. . . . . . . . . . . . . . . . . . . . . . . . . .
–
5 V to +5 V
Analog Input Voltage to AGND . . . .
–
0.3 V to AV
DD
+0.3 V
Reference Input Voltage to AGND . .
–
0.3 V to AV
DD
+0.3 V
Total AIN/REFIN Current (Indefinite) . . . . . . . . . . . . 30 mA
Digital Input Voltage to DGND . . . .
–
0.3 V to DV
DD
+0.3 V
Digital Output Voltage to DGND . . .
–
0.3 V to DV
DD
+0.3 V
Operating Temperature Range . . . . . . . . . . .
–
40
°
C to +85
°
C
Storage Temperature Range . . . . . . . . . . . .
–
65
°
C to +150
°
C
Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . 150
°
C
SOIC Package
θ
JA
Thermal Impedance . . . . . . . . . . . . . . . . . . . . 71.4
°
C/W
θ
JC
Thermal Impedance . . . . . . . . . . . . . . . . . . . . . . 23
°
C/W
TSSOP Package
θ
JA
Thermal Impedance . . . . . . . . . . . . . . . . . . . . 97.9
°
C/W
θ
JC
Thermal Impedance . . . . . . . . . . . . . . . . . . . . . . 14
°
C/W
Lead Temperature, Soldering
Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . . . . 215
°
C
Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220
°
C
NOTES
1
Stresses above those listed under Absolute Maximum Ratings may cause perma-
nent damage to the device. This is a stress rating only; functional operation of the
device at these or any other conditions above those listed in the operational
sections of this specification is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect device reliability.
2
AGND and DGND and connected internally within the AD7719.
ORDERING GUIDE
Model
Temperature Range
–
40
°
C to +85
°
C
–
40
°
C to +85
°
C
Package Description
Package Option
AD7719BR
AD7719BRU
EVAL-AD7719EB
SOIC
TSSOP
Evaluation Board
R-28
RU-28
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