QT411 Datasheet, PDF (10/12 Pages) Quantum Research Group – QSLIDE TOUCH SLIDER IC

4.1 Absolute Maximum Specifications
Operating temperature range, Ta. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40^OC to +85^OC
Storage temperature range, Ts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55^OC to +125^OC
VDD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5 to +7.0V
Max continuous pin current, any control or drive pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20mA
Short circuit duration to ground, any pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . infinite
Short circuit duration to VDD, any pin. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . infinite
Voltage forced onto any pin. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.6V to (Vdd + 0.6) Volts
4.2 Recommended Operating Conditions
VDD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +2.5 to 5.0V
Supply ripple+noise. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5mV p-p max
Cs1, Cs2, Cs3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100nF
Cs1, Cs2, Cs3 relative matching. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±5%
Output load, max. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±0.5mA
4.3 DC Specifications
Vdd = 5.0V, Cs1 = Cs2 = 100nF, 100ms rep rate, Ta = recommended range, all unless otherwise noted
Parameter
Description
Min
Typ
Max
Units
Notes
IDD5P
IDD3P
IDD5A
IDD3A
VDDS
VIL
VHL
VOL
VOH
IIL
AR
Peak supply current
Peak supply current
Average supply current
Average supply current
Supply turn-on slope
Low input logic level
High input logic level
Low output voltage
High output voltage
Input leakage current
Acquisition resolution
0.75
1.5
mA
@ 5V
0.45
0.6
mA
@ 3V
180
µA
@ 5V
110
µA
@ 3V
100
V/s
Required for proper startup and calibration
0.8
V
2.2
V
0.6
V
4mA sink
Vdd-0.7
V
1mA source
±1
µA
7
bits
4.4 AC Specifications
Vdd = 5.0V, Cs1 = Cs2 = 100nF, Ta = recommended range, unless otherwise noted
Parameter
Description
Min
Typ
Max
Units
TR
Response time
ST
Touch Sensitivity
FQT
Sample frequency
TBS
QT Burst spacing
TD
Power-up delay to operate
FSPI
SPI clock rate
-
ms
0.6
pF
92
98
104
kHz
1
ms
550
ms
5
37
kHz
Notes
Under host control
Variable parameter under host control
Modulated spread-spectrum (chirp)
4.5 Signal Processing and Output
Parameter Description
Min
DI
Detection integrator counts
TP
Threshold, prox
1
TT
Threshold, wheel touch
1
HP
Hysteresis, prox sensing
HT
Hysteresis, touch sensing
DR
Drift compensation rate
L
Position linearity
Typ
1
0
12.5
±3
Max
63
63
±10
Units
counts
%
%
%
%
Notes
Both prox and touch detection
Host controlled variable
Host controlled variable
% of threshold setting
% of threshold setting
% of bursts; host controlled
Depends on element linearity, layout
lQ
10
QT411-ISSG R6.01/1005