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參數(shù)資料
| 型號： | AD7816ARMZ |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 溫度/濕度傳感器 |
| 英文描述： | DIGITAL TEMP SENSOR-SERIAL, 10BIT(s), 1Cel, SQUARE, SURFACE MOUNT |
| 封裝： | MICRO, SOIC-8 |
| 文件頁數(shù)： | 11/16頁 |
| 文件大?。?/td> | 203K |
| 代理商： | AD7816ARMZ |
–4–
Parameter
A Version
*B Version
*S Version
Unit
Test Conditions/Comments
ANALOG INPUTS
7
(AD7817 and AD7818)
Input Voltage Range
VREF
V max
0
00V min
Input Leakage
±1
A min
Input Capacitance
10
pF max
LOGIC INPUTS
4
Input High Voltage, VINH
2.4
V min
VDD = 5 V
± 10%
Input Low Voltage, VINL
0.8
V max
VDD = 5 V
± 10%
Input High Voltage, VINH
2
22V min
VDD = 3 V
± 10%
Input Low Voltage, VINL
0.4
V max
VDD = 3 V
± 10%
Input Current, IIN
±3
A max
Typically 10 nA, VIN = 0 V to VDD
Input Capacitance, CIN
10
pF max
LOGIC OUTPUTS4
Output High Voltage, VOH
ISOURCE = 200
A
4
44V min
VDD = 5 V
± 10%
2.4
V min
VDD = 3 V
± 10%
Output Low Voltage, VOL
ISINK = 200
A
0.4
V max
VDD = 5 V
± 10%
0.2
V max
VDD = 3 V
± 10%
High Impedance Leakage Current
±1
A max
High Impedance Capacitance
15
pF max
NOTES
*B and S Versions apply to AD7817 only. For operating temperature ranges, see Ordering Guide.
1AD7816 and AD7817 temperature sensors specified with external 2.5 V reference, AD7818 specified with on-chip reference. All other specifications with external
and on-chip reference (2.5 V). For VDD = 2.7 V, TA = 85
°C max and temperature sensor measurement error = ± 3°C.
2See Terminology.
3The accuracy of the temperature sensor is affected by reference tolerance. The relationship between the two is explained in the section titled Temperature Measure-
ment Error Due to Reference Error.
4Sample tested during initial release and after any redesign or process change that may affect this parameter.
5On-chip reference shuts down when external reference is applied.
6All specifications are typical for AD7818 at temperatures above 85
°C and with V
DD greater than 3.6 V.
7Refers to the input current when the part is not converting. Primarily due to reverse leakage current in the ESD protection diodes.
Specifications subject to change without notice.
CHARGE
REDISTRIBUTION
DAC
CLOCK
DATA
OUT
DIN/OUT
SCLK
RD/
WR
CONVST
AGND
CONTROL
REG
A
B
OVER-TEMP
REG
A > B
OTI
CONTROL
LOGIC
VBALANCE
SAMPLING
CAPACITOR
MUX
REF
2.5V
TEMP
SENSOR
REFIN
VDD
AD7816
Figure 1. AD7816 Functional Block Diagram
CHARGE
REDISTRIBUTION
DAC
CLOCK
GENERATOR
DATA
OUT
DIN/OUT
SCLK
RD/
WR
CONVST
AGND
CONTROL
REG
A
B
OVER-TEMP
REG
A > B
OTI
CONTROL
LOGIC
VBALANCE
SAMPLING
CAPACITOR
MUX
REF
2.5V
TEMP
SENSOR
VDD
VIN1
AD7818
Figure 2. AD7818 Functional Block Diagram
AD7816/AD7817/AD7818–SPECIFICATIONS
1
REV. B
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