qt511 Quantum Research Group, qt511 Datasheet - Page 10

• Manufacturer Part Number: qt511
• Description: Qwheel? Touch Slider Ic
• Manufacturer: Quantum Research Group

4.1 Absolute Maximum Specifications
Operating temperature range, Ta. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40
Storage temperature range, Ts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55
V
Max continuous pin current, any control or drive pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20mA
Short circuit duration to ground, any pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . infinite
Short circuit duration to V
Voltage forced onto any pin. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.6V to (Vdd + 0.6) Volts
4.2 Recommended Operating Conditions
V
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
4.4 AC Specifications
Vdd = 5.0V, Cs1 = Cs2 = 100nF, Ta = recommended range, unless otherwise noted
4.5 Signal Processing and Output
lQ
DD
DD
Parameter
Parameter
Parameter
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5 to +7.0V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +2.5 to 5.0V
I
I
I
I
V
DD
DD
DD
DD
V
V
V
F
F
T
V
A
T
S
T
DDS
I
OH
SPI
H
H
D
HL
OL
IL
QT
DI
T
T
BS
IL
L
R
R
D
5
3
5
3
T
P
T
R
P
T
P
P
A
A
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
Response time
Touch Sensitivity
Sample frequency
QT Burst spacing
Power-up delay to operate
SPI clock rate
Description
Detection integrator counts
Threshold, prox
Threshold, wheel touch
Hysteresis, prox sensing
Hysteresis, touch sensing
Drift compensation rate
Position linearity
Description
Description
DD
, any pin. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . infinite
Vdd-0.7
Min
Min
100
2.2
0.6
92
1
5
Min
1
1
Typ
0.75
0.45
Typ
180
110
550
98
Typ
12.5
-
±3
1
0
10
Max
Max
104
1.5
0.6
0.8
0.6
±1
37
Max
7
±10
63
63
Units
Units
bits
mA
mA
V/s
µA
µA
µA
V
V
V
V
kHz
kHz
Units
counts
ms
ms
ms
pF
%
%
%
%
@ 5V
@ 3V
@ 5V
@ 3V
Required for proper startup and calibration
4mA sink
1mA source
Under host control
Variable parameter under host control
Modulated spread-spectrum (chirp)
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
QT511-ISSG R6.01/1005
Notes
Notes
Notes
O
C to +125
O
C to +85
O
O
C
C