qt1103 Quantum Research Group, qt1103 Datasheet - Page 13

• Manufacturer Part Number: qt1103
• Description: Qtouch? 10-key Sensor Ic
• Manufacturer: Quantum Research Group

4 Specifications
4.1 Absolute Maximum Specifications
Operating temperature, Ta. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40
Storage temp, Ts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -50
Vdd. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 ~ +6.0V
Max continuous pin current, any control or drive pin. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20mA
Short circuit duration to ground or Vdd, any pin. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . infinite
Voltage forced onto any pin. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V ~ (Vdd + 0.3) Volts
4.2 Recommended Operating Conditions
Operating temperature, Ta. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40
V
Short-term supply ripple+noise. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±5mV/s
Long-term supply stability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±100mV
Cs range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [100nF
Cx range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 ~ 50pF
4.3 AC Specifications
Vdd = 5.0V, Ta = recommended, Cx = 5pF, Cs = 4.7nF; circuit of Figure 1.1
4.4 DC Specifications
Vdd = 5.0V, Ta = recommended, Cx = 5pF, Cs = 4.7nF, Ta = recommended range; circuit of Figure 1.1 unless noted
*No spread spectrum circuit
Lq
DD
Parameter
Parameter
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +2.8 ~ +5.0V
Vdds
Tdrn
Iddn
Tdtn
Tres
Voh
Tdrf
Iddl
Tpc
Tsu
Tbd
Tdtf
Tdtl
bps
Vhl
Vol
Trc
Fm
Vil
Fc
Ar
Iil
Description
Average supply current,
normal mode*
Average supply current,
LP mode*
Average supply current, LP
mode
Average supply current, LP
mode, keys on bursts A and B
only
Average supply current,
LP mode, keys on burst B only
Average supply turn-on slope
Low input logic level
High input logic level
Low output voltage
High output voltage
Input leakage current
Acquisition resolution
Description
Recalibration time
Burst center frequency
Burst modulation, percent
Sample pulse duration
Startup time from cold start
Burst duration
Response time - Fast mode
Response time - Normal mode
Response time - LP mode
Release time - Fast mode
Release time - Normal mode
External reset low pulse width
Serial communications speed
Vdd-0.5
8,000
Min
Min
100
3.5
22
15
48
34
36
24
20
14
1
13
Typ
Typ
150
132
260
110
2.5
4.2
2.5
1.8
1.4
15
14
28
10
14
8
2
38,400
Max
Max
0.7
0.5
±1
8
Units
Units
baud
kHz
mA
V/s
bits
ms
ms
ms
ms
ms
ms
ms
ms
µA
µA
µA
µA
µA
µs
µs
%
V
V
V
V
Notes
@ V
@ V
@ V
@ V
@ V
@ V
@ V
@ V
@ V
@ V
@ V
@ V
7mA sink
2.5mA source
Notes
Total deviation
Pulses appear 33 percent longer
when viewed on an oscilloscope.
All three bursts
110ms LP setting
End of touch
End of touch
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
QT1103_3R0.03_0607
= 5.0
= 4.0
= 3.3
= 2.8
= 3.3V; 190ms LP mode
= 2.8V; 190ms LP mode
= 3.3V
= 2.8V
= 3.3V
= 2.8V
= 3.3V
= 2.8V
o
o
o
~ +125
~ +85
~ +85
o
o
o
C
C
C