QT112-S Atmel, QT112-S Datasheet - Page 10

• Manufacturer Part Number: QT112-S
• Description: SENSOR IC TOUCH/PROXMTY 1CH8SOIC
• Manufacturer: Atmel
• Series: QProx™r
• Type: Capacitiver

Specifications of QT112-S

• Rohs Status: RoHS non-compliant
• Touch Panel Interface: 1, 2-Wire
• Number Of Inputs/keys: 1 Key
• Resolution (bits): 14 b
• Data Interface: Serial
• Voltage Reference: Internal
• Voltage - Supply: 2.45 V ~ 5.25 V
• Current - Supply: 60µA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Output Type: Logic
• Interface: 2-Wire
• Input Type: Logic
• Package / Case: -
• Other names: 427-1007

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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.6V to (Vdd + 0.6) Volts
4.2 RECOMMENDED OPERATING CONDITIONS
V
Supply ripple+noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20mV p-p max
Load capacitance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to 20pF
Cs value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10nF to 30nF
4.3 AC SPECIFICATIONS
4.4 SIGNAL PROCESSING
Note 1: Of absolute full scale signal
Note 2: Of signal threshold
Note 3: Strap option.
Parameter
Description
Threshold differential, high gain
Threshold differential, medium gain
Threshold differential, low gain
Hysteresis
Consensus filter length
Positive drift compensation rate
Negative drift compensation rate
Post-detection recalibration timer duration
DD
DD
T
T
T
T
T
T
T
T
F
T
RC
PC
PO
HB
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5 to +6.5V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +2.5 to 5.5V
PT
BS
BL
R
P
P
Recalibration time
Charge duration
Transfer duration
Burst spacing interval
Burst length
Response time
Piezo drive frequency
Piezo drive duration
Pulse output width on Out
Heartbeat pulse width
Description
DD
, any pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . infinite
Vdd = 3.0, Ta = recommended operating range
Min
0.5
Typ
550
129
300
75
75
75
Min
- 10 -
2
2
4
10
Typ
6.25
750
Max
3.1
4.7
50
75
4
7
Max
60
Units
kHz
ms
ms
ms
ms
ms
ms
µs
µs
µs
samples
ms/level
ms/level
Units
secs
%
%
%
%
Note 1
Note 1
Note 1
Note 2
Note 3
Notes
Notes
O
C to +125
O
C