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AD7156 Folha de dados(PDF) 3 Page - Analog Devices

Nome de Peças AD7156
Descrição Electrónicos  Ultralow Power, 1.8 V, 3 mm 횞 3 mm, 2-Channel Capacitance Converter
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Fabricante Electrônico  AD [Analog Devices]
Página de início  http://www.analog.com
Logo AD - Analog Devices

AD7156 Folha de dados(HTML) 3 Page - Analog Devices

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AD7156
Rev. 0 | Page 3 of 28
SPECIFICATIONS
VDD = 1.8 V to 3.6 V, GND = 0 V, temperature range = −40°C to +85°C, unless otherwise noted.
Table 1.
Parameter
Min
Typ
Max
Unit1
Test Conditions/Comments
CAPACITIVE INPUT
Conversion Input Range, CIN to EXC2, 3
3.2
4
pF
4 pF input range
1.6
2
pF
2 pF input range
0.8
1
pF
1 pF input range
0.4
0.5
pF
0.5 pF input range
Resolution4, 5
2.0
fF
4 pF input range
1.6
fF
2 pF input range
1.4
fF
1 pF input range
1.0
fF
0.5 pF input range
Maximum Allowed Capacitance, CIN to GND4, 6
50
pF
See Figure 4, Figure 5, and
Figure 6
Minimum Allowed Resistance, CIN to GND4, 6
10
See Figure 10 and Figure 11
Maximum Allowed Serial Resistance4, 6
50
See Figure 14
Gain Error
−20
+20
%
Gain Deviation over Temperature4
0.5
%FSR
See Figure 17
Gain Matching Between Ranges4
−2
+2
%
Offset Error4
50
fF
CIN and EXC pins disconnected
Offset Deviation over Temperature4
5
fF
CIN and EXC pins disconnected
See Figure 16
Integral Nonlinearity (INL)4
0.05
%
Channel-to-Channel Isolation4
60
dB
Power Supply Rejection4
4
fF/V
CAPDAC
Full Range
10
12.5
pF
Resolution (LSB)4
200
fF
Differential Nonlinearity (DNL)4
0.25
LSB
Auto-DAC Increment/Decrement4, 7
25
75
% of CIN range
EXCITATION
Voltage4, 7
±VDD/2
V
Frequency
16
kHz
See Figure 18
Maximum Allowed Capacitance EXC to GND4, 6
1000
pF
See Figure 7, Figure 8, and
Figure 9
Minimum Allowed Resistance EXC to GND4, 6
1
See Figure 12 and Figure 13
LOGIC OUTPUTS (OUT1, OUT2)
Output Low Voltage (VOL)
0.4
V
ISINK = −3 mA
Output High Voltage (VOH)
VDD – 0.6
V
ISOURCE = +3 mA
SERIAL INTERFACE INPUTS (SCL, SDA)
Input High Voltage (VIH)
70
% of VDD
Input Low Voltage (VIL)
25
% of VDD
Input Leakage Current
±0.1
±5
μA
Input Pin Capacitance
6
pF
OPEN-DRAIN OUTPUT (SDA)
Output Low Voltage (VOL)
0.4
V
ISINK =
6.0 mA
Output High Leakage Current (IOH)
0.1
5
μA
VOUT = VDD


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