QT240-ISS Atmel, QT240-ISS Datasheet - Page 8

• Manufacturer Part Number: QT240-ISS
• Description: IC SENSOR 4CHAN QTOUCH 20SSOP
• Manufacturer: Atmel
• Series: QTouch™r
• Type: Capacitiver

Specifications of QT240-ISS

• Touch Panel Interface: 4, 2-Wire
• Number Of Inputs/keys: 4 Key
• Resolution (bits): 9 b
• Voltage Reference: Internal
• Voltage - Supply: 3.9 V ~ 5 V
• Current - Supply: 1.5mA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 20-SSOP
• Output Type: *
• Interface: *
• Input Type: *
• For Use With: 427-1113 - BOARD EVAL FOR QT240-IS QTOUCH
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 427-1074

4.1 ABSOLUTE MAXIMUM SPECIFICATIONS
Operating temp. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . as designated by suffix
Storage temp. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to (Vdd + 0.3) Volts
4.2 RECOMMENDED OPERATING CONDITIONS
V
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
4.4 DC SPECIFICATIONS
Vdd = 4.0V, Cx = 10pF, Cs = 10nF, Fosc = 100kHz, Ta = recommended range, unless otherwise noted
lQ
DD
DD
Parameter
Parameter
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to +5.5V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +3.9 to +5.0V
F
V
F
V
T
T
T
N
T
V
V
T
I
T
V
A
OSC
I
SSD
DD
DDS
RC
PC
AC
OH
PT
SS
HL
OL
IL
BL
R
IL
R
Pulse duration
Clamp duration
Burst duration, all channels
Burst length, each channel
Response time to output
Acquisition center frequency
Spread spectrum freq deviation
Spread spectrum drive interval
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
Recalibration time from cold
start or hard reset
Description
Description
DD
, any pin. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . infinite
Vdd = 4.0, Ta = recommended, Cx = 10pF, Cs = 10nF, Rosc = 62K ohms
Vdd-0.7
Min
100
Min
2
80
Typ
1.5
90
Typ
+/-7
180
280
250
110
100
9
40
2
8
4
6
8
Max
0.7
0.6
Max
±1
120
Units
counts
Units
bursts
mA
V/s
bits
µA
µA
kHz
V
V
V
V
ms
ms
ms
ms
ms
µs
µs
%
Fast mode
Slow mode, no Sync
Req’d for startup, w/o reset circuit
SYNC, RST
SYNC, RST
OUTn, 4mA sink
OUTn, 1mA source
OPT1, OPT2, OPT3
Either speed mode
Either speed mode
Either speed mode
Either speed mode
Fast mode
Slow mode
Either speed mode
% of Fosc; fast mode only;
Circuit of Figure 1-2
Fast mode only
Fast mode
Slow mode
Notes
QT240 1.07/0804
Notes
O
C to +105
O
C