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
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +2.5 to 5.0V
SuDDpply ripple+noise. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5mV p-p max
Cs1, Cs2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22nF to 100nF
Cs1, Cs2 relative matching. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10%
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
Sp
Ss
Fqt
Tqt
Tbs
Td
Response time
Prox Sensitivity
Slide Sensitivity
Sample frequency
QT Pulse width
QT Burst spacing
Power-up delay to operate
SPI clock rate
-
ms
pF
pF
kHz
µs
µs
Under host control
0.15
0.6
75
1.8
500
Variable parameter under host control
Variable parameter under host control
Modulated spread-spectrum (chirp)
Modulated spread-spectrum
87
2
100
2.4
500
ms
kHz
Fspi
5
40
4.5 Signal Processing and Output
Parameter
Description
Min
Typ
Max
Units
Notes
DI
Tp
Tt
Hp
Ht
Detection integrator counts
Threshold, prox
Threshold, slider 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
QT401 R10.04/0505
QUANTUM [ QUANTUM RESEARCH GROUP ]
