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MPR031 Datasheet, PDF (25/32 Pages) Freescale Semiconductor, Inc – Proximity Capacitive Touch Sensor Controller
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A.4 DC Characteristics
This section includes information about power supply requirements and I/O pin characteristics.
Table 21. DC Characteristics (Temperature Range = –40°C to 85°C Ambient)
(Typical Operating Circuit, VDD = 1.71 V to 2.75 V, TA = TMIN to TMAX, unless otherwise noted. Typical current values are at
VDD = 1.8 V, TA = +25°C.)
Parameter
Symbol
Conditions
Min
Typ
Max Units
Operating Supply Voltage
Average Supply Current
Average Supply Current
Average Supply Current
Average Supply Current
Average Supply Current
Average Supply Current
Average Supply Current
Average Supply Current
VDD
1.71
1.8
2.75
V1
IDD Run1 Mode @ 1 ms sample period
43
57.5
μA 2
IDD Run1 Mode @ 2 ms sample period
22
32
μA 2
IDD Run1 Mode @ 4 ms sample period
14
19.4
μA 2
IDD Run1 Mode @ 8 ms sample period
8
13.3
μA 2
IDD Run1 Mode @ 16 ms sample period
6
10.1
μA 2
IDD Run1 Mode @ 32 ms sample period
5
8.6
μA 2
IDD Run1 Mode @ 64 ms sample period
4
7.8
μA 2
IDD Run1 Mode @ 128 ms sample
period
4
7.5
μA 2
Measurement Supply Current
Idle Supply Current
IDD Peak of measurement duty cycle
IDD Stop Mode
1.25
1.5
mA 2
1.5
4
μA 1
Electrode Charge Current
Accuracy
ELE_
Relative to nominal values programmed
-6
in Register 0x41
+6
%1
Electrode Input Working Range
Electrode charge current accuracy
0.7
ELE_
within specification
VDD - 0.7 V 1
Input Leakage Current ELE_
IIH, IIL
0.025
1
μA 1
Input Capacitance ELE_
15
pF 2
Input High Voltage SDA, SCL
VIH
0.7 x VDD
V2
Input Low Voltage SDA, SCL
Input Leakage Current
SDA, SCL
VIL
IIH, IIL
0.3 x VDD
0.025
1
V2
μA 2
Input Capacitance
SDA, SCL
7
pF 2
Output Low Voltage
SDA, IRQ
VOL IOL = 6mA
0.5V
V1
Power On Reset
VTLH VDD rising
1.08
1.35
1.62
V2
VTHL VDD falling
0.88
1.15
1.42
V2
1. Parameters tested 100% at final test at room temperature; limits at -40°C and +85°C verified by characterization, not tested in production
2. Limits verified by characterization, not tested in production
A.5 AC Characteristics
Table 22. AC CHARACTERISTICS
(Typical Operating Circuit, VDD = 1.71V to 2.75V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VDD = 1.8V,
TA = +25°C.)
Parameter
Symbol
Conditions
Min Typ Max Units
8 MHz Internal Oscillator
fH
32 kHz Internal Oscillator
fL
7.44
8
8.56 MHz 1
20.8
32
43.2 kHz 1
1. Parameters tested 100% at final test at room temperature; limits at -40°C and +70°C verified by characterization, not tested in production
2. Limits verified by characterization, not tested in production.
Sensors
Freescale Semiconductor
MPR03X
25
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