Table 48. TSI electrical specifications (continued)
Symbol
Description
Min.
Typ.
Max.
Unit
Notes
IREF
Reference oscillator current source base current
TBD
1
TBD
μA
IELE
Electrode oscillator current source base current
TBD
1
TBD
μA
Pres5
Electrode capacitance measurement precision
—
TBD
%
Pres20
Electrode capacitance measurement precision
—
TBD
%
Pres100
Electrode capacitance measurement precision
—
TBD
%
MaxSens2
0
Maximum sensitivity @ 20 pF electrode
0.003
0.25
—
fF/count
MaxSens Maximum sensitivity
0.003
—
fF/count
Res
Resolution
—
16
bits
TCon20
Response time @ 20 pF
8
15
25
μs
ITSI_RUN
Current added in run mode
—
TBD
—
μA
ITSI_LP
Low power mode current adder
—
1
TBD
μA
1. The TSI module is functional with capacitance values outside this range. However, optimal performance is not guaranteed.
2. The programmable current source value is generated by multiplying the SCANC[REFCHRG] value and the base current.
3. Measured with a 5 pF electrode, reference oscillator frequency of 10 MHz, PS = 128, NSCN = 8; Iext = 16.
4. Measured with a 20 pF electrode, reference oscillator frequency of 10 MHz, PS = 128, NSCN = 2; Iext = 16.
5. Measured with a 20 pF electrode, reference oscillator frequency of 10 MHz, PS = 16, NSCN = 3; Iext = 16.
6. Measured with a 20 pF electrode, reference oscillator frequency of ~5 MHz (IREF = 5 μA, REFCHRG = 4), PS = 128,
NSCN = 2; Iext = 16 (EXTCHRG = 15).
7. Typical value depends on the configuration used.
8. Time to do one complete measurement of the electrode. Sensitivity resolution of 0.0133 pF, PS = 0, NSCN = 0, 1
electrode, DELVOL = 2, EXTCHRG = 15.
7 Dimensions
7.1 Obtaining package dimensions
Package dimensions are provided in package drawings.
search for the drawing’s document number:
If you want the drawing for this package
Then use this document number
80-pin LQFP
98ASS23174W
81-pin MAPBGA
98ASA10631D
8 Pinout
Dimensions
K50 Sub-Family Data Sheet Data Sheet, Rev. 4, 3/2011.
64
Preliminary
Freescale Semiconductor, Inc.