4.1 Absolute Maximum Specifications
Operating temperature range, Ta. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40OC to +85OC
Storage temperature range, Ts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55OC to +125OC
V
DD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -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 V , any pin. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . infinite
Voltage forced onto any pDinD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.6V to (Vdd + 0.6) Volts
4.2 Recommended Operating Conditions
V
DD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +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
I
I
I
I
DD
DD
DD
DD
5
3
5
3
P
P
A
A
Peak supply current
0.75
0.45
180
110
1.5
0.6
mA
mA
µA
µA
V/s
V
@ 5V
@ 3V
@ 5V
@ 3V
Peak supply current
Average supply current
Average supply current
Supply turn-on slope
Low input logic level
High input logic level
Low output voltage
V
DDS
100
2.2
Required for proper startup and calibration
V
IL
0.8
0.6
V
HL
V
V
V
OL
4mA sink
V
I
A
OH
High output voltage
Input leakage current
Acquisition resolution
Vdd-0.7
V
µA
bits
1mA source
IL
±1
7
R
4.4 AC Specifications
Vdd = 5.0V, Cs1 = Cs2 = 100nF, Ta = recommended range, unless otherwise noted
Parameter
Description
Min
Typ
Max
Units
Notes
TR
ST
FQT
TBS
TD
Response time
-
ms
pF
kHz
ms
ms
kHz
Under host control
Variable parameter under host control
Modulated spread-spectrum (chirp)
Touch Sensitivity
Sample frequency
QT Burst spacing
Power-up delay to operate
SPI clock rate
0.6
92
1
98
104
37
550
FSPI
5
4.5 Signal Processing and Output
Parameter
Description
Min
Typ
Max
Units
Notes
DI
TP
TT
HP
HT
Detection integrator counts
Threshold, prox
Threshold, wheel touch
Hysteresis, prox sensing
Hysteresis, touch sensing
1
counts
Both prox and touch detection
Host controlled variable
Host controlled variable
% of threshold setting
1
1
63
63
0
12.5
%
%
% of threshold setting
DR
L
Drift compensation rate
Position linearity
±10
%
%
% of bursts; host controlled
Depends on element linearity, layout
±3
lQ
10
QT411-ISSG R6.01/1005
QUANTUM [ QUANTUM RESEARCH GROUP ]
