AD7153 Analog Devices, AD7153 Datasheet - Page 3

• Manufacturer Part Number: AD7153
• Description: 12-Bit Capacitance-to-Digital Converter (1 Capacitance Input Channel)
• Manufacturer: Analog Devices

Specifications of AD7153

• Resolution (bits): 12bit
• # Chan: 1
• Sample Rate: 200SPS
• Interface: I²C/Ser 2-Wire,Ser
• Analog Input Type: Capacitive
• Ain Range: ±0.25 pF to ±2 pF Diff,0.5 pF to 4 pF SE
• Adc Architecture: Sigma-Delta
• Pkg Type: SOP

SPECIFICATIONS
V
Table 1.
Parameter
CAPACITIVE INPUT
CAPDAC
EXCITATION
SERIAL INTERFACE LOGIC INPUTS (SCL, SDA)
OPEN-DRAIN OUTPUT (SDA)
POWER SUPPLY MONITOR
DD
Capacitive Input Ranges
Gain Matching Between Ranges
Integral Nonlinearity (INL)
No Missing Codes
Resolution, p-p
Resolution Effective
Absolute Error
System Offset Calibration Range
Offset Deviation over Temperature
Gain Error
Gain Deviation over Temperature
Allowed Capacitance, CIN to GND
Allowed Resistance, CIN to GND
Allowed Serial Resistance
Power Supply Rejection DC
Normal-Mode Rejection
Channel-to-Channel Isolation
Full Range
Resolution
Differential Nonlinearity (DNL)
Offset Deviation over Temperature
Frequency
Voltage
Allowed Capacitance, EXC to GND
Input High Voltage, V
Input Low Voltage, V
Input Leakage Current (SCL)
Output Low Voltage, V
Output High Leakage Current, I
Threshold Voltage, V
= 2.7 V to 3.6 V; GND = 0 V; −40°C to +85°C, unless otherwise noted.
7
8
4
2, 3
2
2, 3
IL
DD
IH
OL
2
2
2
2
2
OH
2
5, 6
2
2
2
2
2
Min
12
5
30.9
1.5
Typ
±2
±1
±0.5
±0.25
4
2
1
0.5
±0.05
10
12
1
0.3
0.3
2
−70
−70
−70
6.25
200
0.3
32
±V
±0.1
0.1
2.45
DD
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Max
±20
40
5
1
0.5
0.4
50
10
20
0.25
32.8
300
0.8
±5
0.4
5
±3
2.65
Unit
pF
pF
pF
pF
pF
pF
pF
pF
% of FS
% of FS
Bits
Bits
Bits
fF
% of FSR
fF
fF
% of FSR
% of FSR
pF
MΩ
kΩ
fF/V
dB
dB
dB
pF
fF
LSB
% of CAPDAC FSR
kHz
V
pF
V
V
μA
V
μA
V
1
Test Conditions/Comments
Differential mode
Single-ended mode
25°C, V
25°C, V
25°C, V
calibration, ±2 pF range
Single-ended mode, CIN and EXC
pins disconnected, see Figure 8
Differential mode, CIN and EXC
pins disconnected
25°C, V
See Figure 7
See Figure 9 and Figure 10
See Figure 13
See Figure 16
See Figure 17
50 Hz ± 1 Hz, conversion time = 60 ms
60 Hz ± 1 Hz, conversion time = 50 ms
AD7152 only
5-bit CAPDAC
See Figure 18 and Figure 19
Single-ended mode
See Figure 11 and Figure 12
I
V
SINK
OUT
=
= V
−
DD
DD
DD
DD
6.0 mA
DD
= 3.3 V, 4 pF range
= 3.3 V, 4 pF range
= 3.3 V, after system offset
= 3.3 V
AD7152/AD7153