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AD7814 Folha de dados(PDF) 3 Page - Analog Devices

Nome de Peças AD7814
Descrição Electrónicos  10-Bit Digital Temperature Sensor
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Fabricante Electrônico  AD [Analog Devices]
Página de início  http://www.analog.com
Logo AD - Analog Devices

AD7814 Folha de dados(HTML) 3 Page - Analog Devices

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REV. E
–2–
AD7814–SPECIFICATIONS1
Parameter
Min
Typ
Max
Unit
Test Conditions/Comments
TEMPERATURE SENSOR AND ADC
Accuracy
±2.0
°CTA = 0°C to 85°C. VDD = 3 V to 5.5 V2
±2.5
°CT
A = –40
°C to 0°C. V
DD = 3 V to 5.5 V
2
±2.0
±3.5
°CT
A = –55
°C to +125°C. V
DD = 3 V to 5.5 V
Resolution
10
Bits
Update Rate, tR
400
µs
Temperature Conversion Time
25
µs
SUPPLIES
Supply Voltage
2.7
5.5
V
For Specified Performance
Supply Current
Normal Mode
250
400
µA
Shutdown Mode (VDD = 5 V)
1.23
3
µA
Shutdown Mode (VDD = 3 V)
0.43
1
µA
Power Dissipation
80
µWV
DD = 3 V. Using Normal Mode
Power Dissipation
VDD = 3 V. Using Shutdown Mode
1 sps
3.7
µW
10 sps
3.9
µW
100 sps
5.8
µW
DIGITAL INPUT
3
Input High Voltage, VIH
2.4
V
Input Low Voltage, VIL
0.8
V
Input Current, IIN
±1
µAV
IN = 0 V to VDD
Input Capacitance, CIN
10
pF
All Digital Inputs
DIGITAL OUTPUT
3
Output High Voltage, VOH
VDD – 0.3 V
ISOURCE = ISINK = 200
µA
Output Low Voltage, VOL
0.4
V
IOL = 200
µA
Output Capacitance, COUT
50
pF
NOTES
1All specifications apply for –55
°C to +125°C unless otherwise stated.
2For V
DD = 2.7 V to 3 V and TA = –40
°C to +85°C, the typical temperature error is ±2°C.
3Guaranteed by design and characterization, not production tested.
Specifications subject to change without notice.
TIMING CHARACTERISTICS1, 2, 3
Parameter
Limit
Unit
Comments
t1
0
ns min
CS to SCLK Setup Time
t2
50
ns min
SCLK High Pulse Width
t3
50
ns min
SCLK Low Pulse Width
t4
4
35
ns max
Data Access Time After SCLK Falling Edge
t5
20
ns min
Data Setup Time Prior to SCLK Rising Edge
t6
0
ns min
Data Hold Time After SCLK Rising Edge
t7
0
ns min
CS to SCLK Hold Time
t8
4
40
ns max
CS to DOUT High Impedance
NOTES
1Guaranteed by design and characterization, not production tested.
2All input signals are specified with tr = tf = 5 ns (10% to 90% of V
DD) and timed from a voltage level of 1.6 V.
3See Figure 2.
4Measured with the load circuit of Figure 1.
Specifications subject to change without notice.
(TA = TMIN to TMAX, VDD = 2.7 V to 5.5 V, unless otherwise noted.)
(TA = TMIN to TMAX, VDD = 2.7 V to 5.5 V, unless otherwise noted.)


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