QT112-S Atmel, QT112-S Datasheet - Page 11

• 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

4.5 DC SPECIFICATIONS
Vdd = 3.0V, Cs = 10nF, Cx = 5pF, T
Preliminary Data: All specifications subject to change.
Parameter
V
V
V
S[1]
S[2]
S[3]
V
V
I
V
C
A
DD
DDS
I
I
8.0
6.0
4.0
2.0
DD
OH
IL
3.0
2.5
2.0
1.5
1.0
0.5
HL
OL
X
IL
R
X
Figure 4-3 Low Gain Sensitivity
Supply voltage
Supply current
Supply turn-on slope
Low input logic level
High input logic level
Low output voltage
High output voltage
Input leakage current
Load capacitance range
Min shunt resistance
Acquisition resolution
Sensitivity - high gain
Sensitivity - medium gain
Sensitivity - low gain
Figure 4-1 High Gain Sensitivity
and Range @ Vdd = 3V
10
and Range @ Vdd = 3V
10
Valid operating range
Description
Valid operating range
Cs, nF
C s, nF
20
20
A
= recommended range, unless otherwise noted
Vdd-0.7
Min
2.45
100
2.2
Cx=30pF
0
Cx=30pF
25pF
20pF
10pF
5pF
0pF
25pF
20pF
10pF
5pF
0pF
30
3 0
500K
Typ
1.5
20
1
3
- 11 -
Max
5.25
0.8
0.6
±1
30
14
180
160
140
120
100
4.0
3.0
2.0
1.0
80
60
40
20
0
3
Units
V/s
bits
µA
µA
pF
pF
pF
pF
✡
V
V
V
V
V
Figure 4-4 Supply Current vs.
Figure 4-2 Medium Gain Sensitivity
Cs = 100nF
10
3.5
Required for proper startup
OPT1, OPT2
OPT1, OPT2
OUT, 4mA sink
OUT, 1mA source
OPT1, OPT2
Resistance from SNS1 to SNS2
Refer to Figures 4-1 through 4-3
Refer to Figures 4-1 through 4-3
Refer to Figures 4-1 through 4-3
Voltage; Cx = 10pF
47nF
22nF
10nF
and Range @ Vdd = 3V
Valid operating range
C s, nF
Vss, Volts
4
20
Notes
4.5
Cx=30pF
25pF
20pF
10pF
5pF
0pF
3 0
5