MK20DN512ZVMB10 FREESCALE [Freescale Semiconductor, Inc], MK20DN512ZVMB10 Datasheet - Page 64

• Manufacturer Part Number: MK20DN512ZVMB10
• Description: K20 Sub-Family Data Sheet
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Dimensions
1. The TSI module is functional with capacitance values outside this range. However, optimal performance is not guaranteed.
2. CAPTRM=7, DELVOL=7, and fixed external capacitance of 20 pF.
3. CAPTRM=0, DELVOL=2, and fixed external capacitance of 20 pF.
4. CAPTRM=0, EXTCHRG=9, and fixed external capacitance of 20 pF.
5. The programmable current source value is generated by multiplying the SCANC[REFCHRG] value and the base current.
6. The programmable current source value is generated by multiplying the SCANC[EXTCHRG] value and the base current.
7. Measured with a 5 pF electrode, reference oscillator frequency of 10 MHz, PS = 128, NSCN = 8; Iext = 16.
8. Measured with a 20 pF electrode, reference oscillator frequency of 10 MHz, PS = 128, NSCN = 2; Iext = 16.
9. Measured with a 20 pF electrode, reference oscillator frequency of 10 MHz, PS = 16, NSCN = 3; Iext = 16.
10. Sensitivity defines the minimum capacitance change when a single count from the TSI module changes, it is equal to (C
11. Time to do one complete measurement of the electrode. Sensitivity resolution of 0.0133 pF, PS = 0, NSCN = 0, 1
12. CAPTRM=7, DELVOL=2, REFCHRG=0, EXTCHRG=4, PS=7, NSCN=0F, LPSCNITV=F, LPO is selected (1 kHz), and
7 Dimensions
64
MaxSens
Pres100
I
Symbol
V
Pres20
TSI_RUN
T
I
Pres5
C
TSI_LP
DELTA
I
I
Res
* I
configuration: Iext = 5 μA, EXTCHRG = 4, PS = 128, NSCN = 2, I
minimum sensitivity describes the smallest possible capacitance that can be measured by a single count (this is the best
sensitivity but is described as a minimum because it’s the smallest number). The minimum sensitivity parameter is based
on the following configuration: I
pF
electrode, DELVOL = 2, EXTCHRG = 15.
fixed external capacitance of 20 pF. Data is captured with an average of 7 periods window.
Con20
REF
ELE
REF
ext
)/( I
ref
Internal reference capacitor
Oscillator delta voltage
Reference oscillator current source base current
Electrode oscillator current source base current
Electrode capacitance measurement precision
Electrode capacitance measurement precision
Electrode capacitance measurement precision
Maximum sensitivity
Resolution
Response time @ 20 pF
Current added in run mode
Low power mode current adder
Description
* PS * NSCN). Sensitivity depends on the configuration used. The typical value listed is based on the following
• 1uA setting (REFCHRG=0)
• 32uA setting (REFCHRG=31)
• 1uA setting (EXTCHRG=0)
• 32uA setting (EXTCHRG=31)
Table 47. TSI electrical specifications (continued)
K20 Sub-Family Data Sheet Data Sheet, Rev. 6, 9/2011.
ext
= 1 μA, EXTCHRG = 0, PS = 128, NSCN = 32, I
0.003
Min.
100
0.5
—
—
—
—
—
—
—
—
—
—
8
ref
= 16 μA, REFCHRG = 15, C
8.3333
8.3333
8.3333
1.133
1.133
12.5
Typ.
600
1.3
36
36
15
55
—
1
ref
= 32 μA, REFCHRG = 31, C
38400
38400
38400
Max.
760
1.2
1.5
1.5
2.5
50
50
16
25
—
—
Freescale Semiconductor, Inc.
ref
fF/count
= 1.0 pF. The
Unit
bits
mV
μA
μA
μA
μA
pF
μs
%
%
%
Notes
ref
3,
3,6
10
11
12
4
7
8
9
= 0.5
5
ref