Data Sheet

MPR121 Sensor
21 Freescale Semiconductor
DC CHARACTERISTICS
This section includes information about power supply requirements and I/O pin characteristics.
Table 4. DC Characteristics
(Typical Operating Circuit, V
DD
= V
REG
= 1.8 V, T
A
= 25°C, unless otherwise noted.)
Parameter
Symbol
Conditions
Min
Typ
Max
Units
High Supply Voltage
V
DD
2.0
3.3
3.6
V
Low Supply Voltage
V
REG
1.71
1.8
2.75
V
Average Supply Current
I
DD
Run1 Mode @ 1 ms sample interval
393
μ A
Average Supply Current
I
DD
Run1 Mode @ 2 ms sample interval
199
μ A
Average Supply Current
I
DD
Run1 Mode @ 4 ms sample interval
102
μ A
Average Supply Current
I
DD
Run1 Mode @ 8 ms sample interval
54
μ A
Average Supply Current
I
DD
Run1 Mode @ 16 ms sample interval
29
μ A
Average Supply Current
I
DD
Run1 Mode @ 32 ms sample interval
17
μ A
Average Supply Current
I
DD
Run1 Mode @ 64 ms sample interval
11
μ A
Average Supply Current
I
DD
Run1 Mode @ 128 ms sample interval
8
μ A
Measurement Supply Current
I
DD
Peak of measurement duty cycle
1
mA
Idle Supply Current
I
DD
Stop Mode
3
μ A
Input Leakage Current ELE_
I
IH
, I
IL
0.025
μ A
Input Capacitance ELE_
15
pF
Input High Voltage SDA, SCL
V
IH
0.7 x V
DD
V
Input Low Voltage SDA, SCL
V
IL
0.3 x V
DD
V
Input Leakage Current
SDA, SCL
I
IH
, I
IL
0.025
1
μ A
Input Capacitance
SDA, SCL
7
pF
Output Low Voltage
SDA, IRQ
V
OL
I
OL
= 6mA
0.5V
V
Output High Voltage
ELE4 - ELE11 (GPIO mode)
V
OHGPIO
V
DD
= 2.7 V to 3.6 V: I
OHGPIO
= -10 mA
V
DD
= 2.3 V to 2.7 V: I
OHGPIO
= -6 mA
V
DD
= 1.8 V to 2.3 V: I
OHGPIO
= -3 mA
V
DD
- 0.5
V
Output Low Voltage
ELE4 - ELE11 (GPIO mode)
V
OLGPIO
I
OLGPIO
= 1 mA
0.5
V
Power On Reset
V
TLH
V
DD
rising
1.08
1.35
1.62
V
V
THL
V
DD
falling
0.88
1.15
1.42
V
AC CHARACTERISTICS
Table 5. AC CHARACTERISTICS
(Typical Operating Circuit, V
DD
and V
REG
= 1.8 V, T
A
= 25°C , unless otherwise noted.)
Parameter
Symbol
Conditions
Min
Typ
Max
Units
8 MHz Internal Oscillator
f
H
7.44
8
8.56
MHz
1 kHz Internal Oscillator
f
L
0.65
1
1.35
kHz