Freescale Semiconductor Evaluation Board MPR031/2 for 2- or 3-pad touch sensor controllers DEMOMPR031 DEMOMPR031 データシート

Sensors
Freescale Semiconductor

25

This section includes information about power supply requirements and I/O pin characteristics.

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

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.

(Typical Operating Circuit, 

V

DD

 = 1.71 V to 2.75 V, T

A

 = T

MIN

 to T

MAX

, unless otherwise noted. Typical current values are at 

V

DD

 = 1.8 V, T

A

 = +25°C.)

Operating Supply Voltage

V

DD

1.71

1.8

2.75

V

1

Average Supply Current

I

DD

Run1 Mode @ 1 ms sample period

43

57.5

A

2

Average Supply Current

I

DD

Run1 Mode @ 2 ms sample period

22

32

A

2

Average Supply Current

I

DD

Run1 Mode @ 4 ms sample period

14

19.4

A

2

Average Supply Current

I

DD

Run1 Mode @ 8 ms sample period

8

13.3

A

2

Average Supply Current

I

DD

Run1 Mode @ 16 ms sample period

6

10.1

A

2

Average Supply Current

I

DD

Run1 Mode @ 32 ms sample period

5

8.6

A

2

Average Supply Current

I

DD

Run1 Mode @ 64 ms sample period

4

7.8

A

2

Average Supply Current

I

DD

Run1 Mode @ 128 ms sample period

4

7.5

A

2

Measurement Supply Current 

I

DD

Peak of measurement duty cycle

1.25

1.5

mA

2

Idle Supply Current 

I

DD

Stop Mode

1.5

4

A

1

Electrode Charge Current 
Accuracy 
ELE_

Relative to nominal values programmed 
in Register 0x41

-6

+6

%

1

Electrode Input Working Range 
ELE_

Electrode charge current accuracy 
within specification

0.7

V

DD

 - 0.7

V

1

Input Leakage Current ELE_

I

IH

, I

IL

0.025

1

A

1

Input Self-Capacitance ELE_

15

pF

2

Input High Voltage SDA, SCL

V

IH

0.7 x V

DD

V

2

Input Low Voltage SDA, SCL

V

IL

0.3 x V

DD

V

2

Input Leakage Current 
SDA, SCL

I

IH

, I

IL

0.025

1

A

2

Input Capacitance 
SDA, SCL

7

pF

2

Output Low Voltage 
SDA, IRQ

V

OL

I

OL

 = 6mA

0.5V

V

1

Power On Reset

V

TLH

V

DD

 rising

1.08

1.35

1.62

V

2

V

THL

V

DD

 falling

0.88

1.15

1.42

V

2

 AC CHARACTERISTICS
(Typical Operating Circuit, V

DD

 = 1.71V to 2.75V, T

A

 = T

MIN

 to T

MAX

, unless otherwise noted. Typical values are at V

DD

 = 1.8V, 

T

A

 = +25°C.)

8 MHz Internal Oscillator

f

H

7.44

8

8.56

MHz

1

32 kHz Internal Oscillator

f

L

20.8

32

43.2

kHz

1