qt1081 Quantum Research Group, qt1081 Datasheet - Page 12

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qt1081

Manufacturer Part Number
qt1081
Description
8-key Qtouch? Sensor Ic
Manufacturer
Quantum Research Group
Datasheet

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
qt1081-ISG
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
4 Specifications
4.1 Absolute Maximum Specifications
Operating temperature, Ta. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40C to +85
Storage temp, Ts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -50
Vdd. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to +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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1nF to 100nF
Cx range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to 50pF
4.3 AC Specifications
Vdd = 5.0, Ta = recommended, Cx = 5pF, Cs = 1nF; circuit of Figure 1.1
4.4 DC Specifications
Vdd = 5.0, Ta = recommended, Cx = 5pF, Cs = 1nF; circuit of Figure 1.1 unless noted
*No spread spectrum circuit; Rosc = 18KΩ
lQ
DD
Parameter
Parameter
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +2.8 to +5.0V
V
Tpc
Tsu
Tbd
Tdn
I
I
V
Trc
Fm
Tdf
Tdl
Tdr
V
V
Fc
DDN
V
DDL
A
DDS
I
OH
IL
HL
OL
IL
R
Description
Recalibration time
Burst center frequency
Burst modulation, percent
Sample pulse duration
Start-up time from cold start
Burst duration
Response time - Fast mode
Response time - Normal mode
Response time - LP mode
Release time - all modes
Description
Average supply current,
normal mode*
Average supply current, LP
mode*
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
Vdd-0.5
Min
Min
100
3.5
22
15
15
10
12
Typ
Typ
150
132
300
180
2.5
5.6
3.6
2.3
1.6
15
20
20
2
6
8
Max
Max
0.7
0.5
±1
8
Units
Units
kHz
ms
ms
ms
ms
ms
ms
ms
bits
mA
V/s
µs
%
µA
µA
µA
V
V
V
V
Notes
Total deviation
Pulses appear 33 percent longer when
viewed on an oscilloscope.
Both bursts together
180ms LP setting
End of touch
Notes
@ Vdd = 5.0
@ Vdd = 4.0
@ Vdd = 3.3
@ Vdd = 2.8
@ Vdd = 3.3V; 340ms LP mode
@ Vdd = 2.8V; 340ms LP mode
@ Vdd = 3.3V
@ Vdd = 2.8V
@ Vdd = 2.8V
7mA sink
2.5mA source
QT1081_1R0.04_0307
o
C to +125
o
to +85
o
o
o
C
C
C

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