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QT240-ISSG Datasheet(PDF) 9 Page - Quantum Research Group

Part # QT240-ISSG
Description  4 KEY QTOUCH SENSOR IC
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Manufacturer  QUANTUM [Quantum Research Group]
Direct Link  http://www.qprox.com
Logo QUANTUM - Quantum Research Group

QT240-ISSG Datasheet(HTML) 9 Page - Quantum Research Group

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4 Specifications
4.1 Absolute Maximum Specifications
Operating temp................................................................................ as designated by suffix
Storage temp....................................................................................... -55OC to +105OC
VDD.................................................................................................... -0.3 to +5.5V
Max continuous pin current, any control or drive pin .............................................................. ±20mA
Short circuit duration to ground, any pin ......................................................................... infinite
Short circuit duration to VDD, any pin............................................................................ infinite
Voltage forced onto any pin................................................................... -0.3V to (Vdd + 0.3) Volts
4.2 Recommended Operating Conditions
VDD.................................................................................................... +3.9 to +5.0V
Operating temperature range, 4.0V - 5.5V................................................................... -40 - +85C
Operating frequency, 4.0V - 5.5V............................................................................. 100 kHz
Short-term supply ripple+noise .................................................................................. ±5mV
Long-term supply stability.................................................................................... ±100mV
Cs (reference capacitors) value......................................................................... 4.7nF to 47nF
Cx (SNS load capacitance) maximum value....................................................................... 50pF
4.3 AC Specifications
Vdd = 4.0, Ta = recommended, Cx = 10pF, Cs = 10nF, Rosc = 62K ohms
Fast mode only
bursts
6
Spread spectrum drive interval
TSS
% of Fosc; Fast mode only;
Circuit of Figure 1.2
%
±7
Spread spectrum freq deviation
FSSD
Either speed mode
kHz
120
100
80
Acquisition center frequency
FOSC
Fast mode
Slow mode
ms
ms
40
110
Response time to output
TR
Either speed mode
counts
400
Burst length, each channel
NBL
Either speed mode
ms
4
Burst duration, all channels
TAC
Either speed mode
µs
8
Clamp duration
TPT
Either speed mode
µs
2
Pulse duration
TPC
Fast mode
Slow mode
ms
ms
180
280
Recalibration time from cold
start or hard reset
TRC
Notes
Units
Max
Typ
Min
Description
Parameter
4.4 DC Specifications
Vdd = 4.0V, Cx = 10pF, Cs = 10nF, Fosc = 100kHz, Ta = recommended range, unless otherwise noted
bits
9
Acquisition resolution
AR
OPT1, OPT2, OPT3
µA
±1
Input leakage current
IIL
OUTn, 1mA source
V
Vdd-0.7
High output voltage
VOH
OUTn, 4mA sink
V
0.6
Low output voltage
VOL
SYNC
V
0.7Vdd
High input logic level
VHLS
SYNC
V
0.3Vdd
Low input logic level
VILS
/RES
V
0.9Vdd
High input logic level
VHLR
/RES
V
0.4Vdd
Low input logic level
VILR
Required for startup, w/o reset circuit
V/s
100
Supply turn-on slope
VDDS
Fast mode
Slow mode, no Sync
mA
µA
1.5
90
Supply current
IDD
Notes
Units
Max
Typ
Min
Description
Parameter
lQ
9
QT240R R1.11/1006


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