AD7944 데이터 시트보기 (PDF) - Analog Devices
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AD7944 Datasheet PDF : 28 Pages
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AD7944
Table 3.
Parameter
INTERNAL REFERENCE
Output Voltage
Temperature Drift
Line Regulation
Turn-On Settling Time
REFIN Output Voltage
REFIN Output Resistance
EXTERNAL REFERENCE
Voltage Range
Current Drain
REFERENCE BUFFER
REFIN Input Voltage
REFIN Input Current
DIGITAL INPUTS
Logic Levels
VIL
VIH
IIL
IIH
DIGITAL OUTPUTS
Data Format
Pipeline Delay
Test Conditions/Comments
PDREF is low
TA = 25°C
−40°C to +85°C
AVDD = 2.5 V ± 5%
CREF = 10 μF, CREFIN = 0.1 μF
REFIN at 25°C
PDREF is high, REFIN is low
VOL
VOH
POWER SUPPLIES
AVDD, DVDD
BVDD
VIO
Standby Current1, 2
Power Dissipation
With Internal Reference
With External Reference
TEMPERATURE RANGE3
Specified Performance
ISINK = +500 µA
ISOURCE = −500 µA
Specified performance
AVDD = DVDD = VIO = 2.5 V
2.5 MSPS throughput
2.0 MSPS throughput
2.5 MSPS throughput
2.0 MSPS throughput
TMIN to TMAX
1 With all digital inputs forced to VIO or GND as required.
2 During acquisition phase.
3 Contact an Analog Devices, Inc., sales representative for the extended temperature range.
Data Sheet
Min
4.081
2.4
Typ
4.096
±10
±50
40
1.2
6
500
1.2
160
Max
4.111
5.1
Unit
V
ppm/°C
ppm/V
ms
V
kΩ
V
µA
V
µA
−0.3
0.9 × VIO
−1
−1
+0.1 × VIO V
VIO + 0.3
V
+1
µA
+1
µA
Serial 14 bits, straight binary
Conversion results available immediately
after completed conversion
0.4
V
VIO − 0.3
V
2.375
2.5
2.625
V
4.75
5.0
5.25
V
1.8
2.5
2.7
V
1.0
µA
28
33
mW
25
30
mW
15.5
17
mW
12
13
mW
−40
+85
°C
Rev. C | Page 4 of 28
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