QT1080-ISG Atmel, QT1080-ISG Datasheet - Page 10

• Manufacturer Part Number: QT1080-ISG
• Description: IC SENSOR QTOUCH 8CHAN 32QFN
• Manufacturer: Atmel
• Series: QTouch™r
• Type: Capacitiver

Specifications of QT1080-ISG

• Touch Panel Interface: 8, 2-Wire
• Number Of Inputs/keys: 8 Key
• Resolution (bits): 8 b
• Voltage Reference: Internal
• Voltage - Supply: 2.8 V ~ 5 V
• Current - Supply: 8mA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 32-QFN
• Output Type: Logic
• Input Type: Logic
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Interface: -
• Other names: 427-1090; 427-1090-2; 427-1090

4 Specifications
4.1 Absolute Maximum Specifications
Operating temperature, Ta. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40 ~ +85ºC
Storage temp, Ts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -50ºC ~ +125ºC
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 ~ +85ºC
V
Short-term supply ripple+noise. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±5mV/s
Long-term supply stability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±100mV
Cs range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.2nF ~ 100nF
Cx range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 ~ 50pF
4.3 AC Specifications
Vdd = 5.0, Ta = recommended, Cx = 5pF, Cs = 4.7nF; circuit of Figure 1.1
4.4 DC Specifications
Vdd = 5.0, Ta = recommended, Cx = 5pF, Cs = 4.7nF; circuit of Figure 1.1 unless noted
*No spread spectrum circuit; Rosc = 18K
4.5 Signal Processing
Vdd = 5.0, Ta = recommended, Cx = 5pF, Cs = 4.7nF
lQ
Description
Detection threshold
Detection hysteresis
Anti-detection threshold
Anti-detection recalibration delay
Detect Integrator filter, normal mode
Detect Integrator filter, ‘fast’ mode
Max On-Duration
Normal drift compensation rate
Anti-drift compensation rate
DD
Parameter
Parameter
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +2.8 ~ +5.0V
V
Tbd
Tdn
I
Tpc
Tsu
I
V
Trc
Fm
Tdf
Tdl
Tdr
V
V
Fc
DDN
V
A
DDL
DDS
I
OL
OH
IL
HL
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 turn-on slope
Low input logic level
High input logic level
Low output voltage
High output voltage
Input leakage current
Acquisition resolution
10, 60, ∞
Vdd-0.5
Value
Min
2,000
Min
100
500
3.5
10
2
6
2
6
2
samples
samples
ms/level
ms/level
Units
counts
counts
counts
10
Typ
Typ
secs
secs
150
132
350
200
3.4
4.5
2.7
2.2
1.8
1.5
1.3
15
10
25
25
45
2
8
Notes
Threshold for increase in Cx load
Threshold for decrease of Cx load
Time to recalibrate if Cx load has exceeded anti-detection threshold
Must be consecutive or detection fails
Must be consecutive or detection fails
Option pin selected
Towards increasing Cx load
Towards decreasing Cx load
Max
Max
0.7
0.5
±1
8
Units
Units
kHz
ms
ms
ms
ms
ms
ms
ms
mA
V/s
bits
µs
%
µA
µA
V
V
V
V
Notes
Total deviation
Both bursts together
200ms LP setting
End of touch
Notes
@ Vdd = 5.0
@ Vdd = 4.0
@ Vdd = 3.6
@ Vdd = 3.3
@ Vdd = 3.0
@ Vdd = 2.8
@ Vdd = 3.0; 360ms LP mode
Required for start-up, w/o external reset
circuit
7mA sink
2.5mA source
QT1080 R11.06/0806