AD7156 Analog Devices, AD7156 Datasheet - Page 3

• Manufacturer Part Number: AD7156
• Manufacturer: Analog Devices

Specifications of AD7156

• Resolution (bits): 12bit
• # Chan: 2
• Sample Rate: 100SPS
• Interface: I²C/Ser 2-Wire,Ser
• Analog Input Type: Capacitive
• Ain Range: 0.5 pF,1 pF,2 pF,4 pF
• Pkg Type: CSP

SPECIFICATIONS
V
Table 1.
Parameter
CAPACITIVE INPUT
CAPDAC
EXCITATION
LOGIC OUTPUTS (OUT1, OUT2)
SERIAL INTERFACE INPUTS (SCL, SDA)
OPEN-DRAIN OUTPUT (SDA)
DD
Conversion Input Range, CIN to EXC
Resolution
Maximum Allowed Capacitance, CIN to GND
Minimum Allowed Resistance, CIN to GND
Maximum Allowed Serial Resistance
Gain Error
Gain Deviation over Temperature
Gain Matching Between Ranges
Offset Error
Offset Deviation over Temperature
Integral Nonlinearity (INL)
Channel-to-Channel Isolation
Power Supply Rejection
Full Range
Resolution (LSB)
Differential Nonlinearity (DNL)
Auto-DAC Increment/Decrement
Voltage
Frequency
Maximum Allowed Capacitance EXC to GND
Minimum Allowed Resistance EXC to GND
Output Low Voltage (V
Output High Voltage (V
Input High Voltage (V
Input Low Voltage (V
Input Leakage Current
Input Pin Capacitance
Output Low Voltage (V
Output High Leakage Current (I
= 1.8 V to 3.6 V, GND = 0 V, temperature range = −40°C to +85°C, unless otherwise noted.
4, 7
4, 5
4
4
IL
IH
)
OL
OL
)
OH
4
)
)
)
4
4
4
OH
4
4, 7
4
)
4
2, 3
4, 6
4, 6
4, 6
4, 6
4, 6
Rev. 0 | Page 3 of 28
Min
3.2
1.6
0.8
0.4
−20
−2
10
25
V
70
DD
– 0.6
Typ
4
2
1
0.5
2.0
1.6
1.4
1.0
50
10
50
0.5
50
5
0.05
60
4
12.5
200
±V
16
1000
1
±0.1
6
0.1
DD
/2
Max
+20
+2
0.25
75
0.4
25
±5
0.4
5
Unit
pF
pF
pF
pF
fF
fF
fF
fF
pF
MΩ
kΩ
%FSR
%
fF
fF
%
dB
fF/V
pF
fF
LSB
% of C
V
kHz
pF
MΩ
V
V
% of V
% of V
pF
V
μA
%
μA
1
DD
DD
IN
range
Test Conditions/Comments
4 pF input range
2 pF input range
1 pF input range
0.5 pF input range
4 pF input range
2 pF input range
1 pF input range
0.5 pF input range
See Figure 4, Figure 5, and
Figure 6
See Figure 10 and Figure 11
See Figure 14
See Figure 17
CIN and EXC pins disconnected
CIN and EXC pins disconnected
See Figure 16
See Figure 18
See Figure 7, Figure 8, and
Figure 9
See Figure 12 and Figure 13
I
I
I
V
SINK
SOURCE
SINK
OUT
= −3 mA
=
= V
−
= +3 mA
6.0 mA
DD
AD7156