K52P144M100SF2V2 Datasheet, PDF (70/80 Pages) Freescale Semiconductor, Inc – K52 Sub-Family

Dimensions
Table 58. TSI electrical specifications (continued)
Symbol
I_{TSI_RUN}
I_{TSI_LP}
Description
Current added in run mode
Low power mode current adder
Min.
Typ.
Max.
Unit
—
55
—
μA
—
1.3
2.5
μA
Notes
13
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_DD = 3.0 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
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_ref * I_ext)/( I_ref * PS * NSCN)
The typical value is calculated with the following configuration:
I_ext = 6 μA (EXTCHRG = 2), PS = 128, NSCN = 2, I_ref = 16 μA (REFCHRG = 7), C_ref = 1.0 pF
The minimum value is calculated with the following configuration:
I_ext = 2 μA (EXTCHRG = 0), PS = 128, NSCN = 32, I_ref = 32 μA (REFCHRG = 15), C_ref = 0.5 pF
The highest possible sensitivity is the minimum value because it represents the smallest possible capacitance that can be
measured by a single count.
12. Time to do one complete measurement of the electrode. Sensitivity resolution of 0.0133 pF, PS = 0, NSCN = 0, 1
electrode, EXTCHRG = 7.
13. REFCHRG=0, EXTCHRG=4, PS=7, NSCN=0F, LPSCNITV=F, LPO is selected (1 kHz), and fixed external capacitance of
20 pF. Data is captured with an average of 7 periods window.
7 Dimensions
7.1 Obtaining package dimensions
Package dimensions are provided in package drawings.
To find a package drawing, go to http://www.freescale.com and perform a keyword
search for the drawing’s document number:
If you want the drawing for this package
144-pin LQFP
144-pin MAPBGA
Then use this document number
98ASS23177W
98ASA00222D
K52 Sub-Family Data Sheet, Rev. 1, 6/2012.
70
Preliminary
Freescale Semiconductor, Inc.
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