MK20DX128VFT5 Freescale Semiconductor, MK20DX128VFT5 Datasheet - Page 55

• Manufacturer Part Number: MK20DX128VFT5
• Description: ARM Microcontrollers - MCU KINETIS 128K FLEX
• Manufacturer: Freescale Semiconductor

Specifications of MK20DX128VFT5

• Core: ARM Cortex M4
• Processor Series: Kinetis K20
• Data Bus Width: 32 bit
• Maximum Clock Frequency: 50 MHz
• Program Memory Size: 128 KB
• Data Ram Size: 2 KB
• On-chip Adc: Yes
• Operating Supply Voltage: 1.71 V to 3.6 V
• Operating Temperature Range: - 40 C to + 105 C
• Package / Case: QFN-48
• Mounting Style: SMD/SMT

1. The TSI module is functional with capacitance values outside this range. However, optimal performance is not guaranteed.
2. Fixed external capacitance of 20 pF.
3. REFCHRG = 2, EXTCHRG=0.
4. REFCHRG = 0, EXTCHRG = 10.
5. V
6. The programmable current source value is generated by multiplying the SCANC[REFCHRG] value and the base current.
7. The programmable current source value is generated by multiplying the SCANC[EXTCHRG] value and the base current.
8. Measured with a 5 pF electrode, reference oscillator frequency of 10 MHz, PS = 128, NSCN = 8; Iext = 16.
9. Measured with a 20 pF electrode, reference oscillator frequency of 10 MHz, PS = 128, NSCN = 2; Iext = 16.
10. Measured with a 20 pF electrode, reference oscillator frequency of 10 MHz, PS = 16, NSCN = 3; Iext = 16.
11. Sensitivity defines the minimum capacitance change when a single count from the TSI module changes. Sensitivity
12. Time to do one complete measurement of the electrode. Sensitivity resolution of 0.0133 pF, PS = 0, NSCN = 0, 1
13. REFCHRG=0, EXTCHRG=4, PS=7, NSCN=0F, LPSCNITV=F, LPO is selected (1 kHz), and fixed external capacitance of
7 Dimensions
7.1 Obtaining package dimensions
Package dimensions are provided in package drawings.
To find a package drawing, go to
search for the drawing’s document number:
Freescale Semiconductor, Inc.
48-pin LQFP
48-pin QFN
I
Symbol
TSI_RUN
T
I
TSI_LP
depends on the configuration used. The documented values are provided as examples calculated for a specific
configuration of operating conditions using the following equation: (C
The typical value is calculated with the following configuration:
I
The minimum value is calculated with the following configuration:
I
The highest possible sensitivity is the minimum value because it represents the smallest possible capacitance that can be
measured by a single count.
electrode, EXTCHRG = 7.
20 pF. Data is captured with an average of 7 periods window.
Con20
ext
ext
DD
= 6 μA (EXTCHRG = 2), PS = 128, NSCN = 2, I
= 2 μA (EXTCHRG = 0), PS = 128, NSCN = 32, I
= 3.0 V.
If you want the drawing for this package
Response time @ 20 pF
Current added in run mode
Low power mode current adder
Description
Table 40. TSI electrical specifications (continued)
K20 Sub-Family Data Sheet, Rev. 4 5/2012.
http://www.freescale.com
ref
ref
= 16 μA (REFCHRG = 7), C
= 32 μA (REFCHRG = 15), C
98ASH00962A
98ARH99048A
Min.
—
—
8
ref
* I
ext
Then use this document number
)/( I
Typ.
1.3
15
55
ref
and perform a keyword
* PS * NSCN)
ref
= 1.0 pF
ref
= 0.5 pF
Max.
2.5
25
—
Unit
μA
μA
μs
Dimensions
Notes
12
13
55