AD7818ARMZ-REEL7 Просмотр технического описания (PDF) - Analog Devices
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AD7818ARMZ-REEL7 Datasheet PDF : 20 Pages
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Data Sheet
AD7817/AD7818
Parameter
POWER REQUIREMENTS (AD7818 ONLY)6
VDD
IDD
Normal Operation
Using External Reference
Power-Down (VDD = 5 V)
Power-Down (VDD = 3 V)
Auto Power-Down Mode
10 SPS Throughput Rate
1 kSPS Throughput Rate
10 kSPS Throughput Rate
Power-Down
ANALOG INPUTS (AD7817/AD7818)7
Input Voltage Range
Input Leakage
Input Capacitance
LOGIC INPUTS (AD7817/AD7818)4
Input High Voltage, VINH
Input Low Voltage, VINL
Input High Voltage, VINH
Input Low Voltage, VINL
Input Current, IIN
Input Capacitance, CIN
LOGIC OUTPUTS (AD7817/AD7818)4
Output High Voltage, VOH
Output Low Voltage, VOL
High Impedance Leakage Current
High Impedance Capacitance
A Version1 B Version1 S Version1 Unit
5.5
V max
2.7
V min
2
1.75
10.75
4.5
mA max
mA max
µA max
µA max
6.4
µW typ
48.8
µW typ
434
µW typ
13.5
µW max
VREF
VREF
VREF
V max
0
0
0
V min
±1
±1
±1
µA min
10
10
10
pF max
2.4
2.4
2.4
V min
0.8
0.8
0.8
V max
2
2
2
V min
0.4
0.4
0.4
V max
±3
±3
±3
µA max
10
10
10
pF max
4
4
4
V min
2.4
2.4
2.4
V min
0.4
0.4
0.4
V max
0.2
0.2
0.2
V max
±1
±1
±1
µA max
15
15
15
pF max
Test Conditions/Comments
For specified performance
Logic inputs = 0 V or VDD
1.3 mA typical
2.5 V external reference connected
6 µA typ
2 µA typ
VDD = 3 V
See the Power vs Throughput section
for description of power dissipation
in auto power-down mode
Typically 6 µW
VDD = 5 V ±10%
VDD = 5 V ±10%
VDD = 3 V ±10%
VDD = 3 V ±10%
Typically 10 nA, VIN = 0 V to VDD
ISOURCE = 200 µA
VDD = 5 V ± 10%
VDD = 3 V ± 10%
ISINK = 200 µA
VDD = 5 V ± 10%
VDD = 3 V ± 10%
1 The B Version and the S Version only apply to the AD7817. The A Version applies to the AD7817 or the AD7818 (as stated in specification).
2 See Terminology.
3 The accuracy of the temperature sensor is affected by reference tolerance. The relationship between the two is explained in the Temperature Measurement Error Due
to Reference Error section.
4 Sample tested during initial release and after any redesign or process change that may affect this parameter.
5 On-chip reference shuts down when external reference is applied.
6 These specifications are typical for AD7818 at temperatures above 85°C and with VDD greater than 3.6 V.
7 This refers to the input current when the part is not converting. Primarily due to the reverse leakage current in the ESD protection diodes.
Rev. D | Page 5 of 20
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