qt1101 Quantum Research Group, qt1101 Datasheet - Page 4

• Manufacturer Part Number: qt1101
• Description: 10 Key Qtouch? Sensor Ic
• Manufacturer: Quantum Research Group

Table 1.2
AKS / Fast-Detect Options
Table 1.3
Max On-Duration
Table 1.4
Detect Pin Drive
Table 1.5
SYNC/LP Function
Lq
KEY 3
KEY 4
KEY 5
KEY 6
KEY 7
KEY 8
KEY 9
DETECT OUT
SYNC or LP
Vunreg
R
R
R
R
R
R
R
SNS3
SNS4
SNS5
10K
10K
10K
SNS6
SNS7
10K
SNS8
10K
SNS9
10K
10K
4.7nF
4.7nF
4.7nF
4.7nF
4.7nF
4.7nF
4.7nF
Pullup not required for push-pull mode
See Detect pin mode table below
4.7uF
C
C
C
C
C
C
C
S3
S4
S5
S6
S8
S7
S9
Figure 1.1 Connection Diagram - Full Options (32-QFN Package)
2.2K
2.2K
2.2K
2.2K
2.2K
2.2K
2.2K
R
R
R
R
R
R
R
S3
S4
S5
S6
S7
S8
S9
Voltage Reg
+2.8 ~ +5V
Vdd
Vdd / Vss
Vdd / Vss
Vdd / Vss
Vdd / Vss
MOD_1
OUT_D
SL_1
SL_0
MOD_1
OUT_D
AKS_1
SL_1
100K
Vdd
Vdd
Vdd
Vdd
Vdd
Vdd
Vdd
4.7uF
Vss
Vss
Vss
Vss
Vss
Vss
Vss
1M
1M
1M
1M
12
13
15
16
17
18
19
20
21
25
26
27
28
23
24
*100nF
DETECT PIN MODE
Open drain, active low
Push-pull, active high
SNS3
SNS3K
SNS4
SNS4K
SNS5
SNS5K
SNS6
SNS6K
SNS7
SNS7K
SNS8
SNS8K
SNS9
SNS9K
SYNC/LP
DETECT
MOD_0
AKS_0
SL_0
Vss
Vdd
Vss
Vdd
Vss
Vdd
Vss
Vdd
Vss
Vdd
Vss
Vdd
VDD
3
QT1101
32-QFN
22
VSS
VDD
4
AKS MODE
Off
Off
On, in 3 groups
On, global
/RST
MAX ON-DURATION MODE
10 seconds to recalibrate
60 seconds to recalibrate
Infinite (disabled)
(reserved)
SYNC/LP PIN MODE
Sync
LP mode: 120ms response time
LP mode: 200ms response time
LP mode: 360ms response time
/CHANGE
2
SNS2K
SNS1K
SNS0K
SNS2
SNS1
SNS0
OSC
N.C.
N.C.
1W
RX
SS
5
11
10
9
8
7
6
4
32
31
30
29
1
No Spread-spectrum:
Replace Css with 100K resistor
1M
1M
1M
FAST-DETECT
Off
Enabled
Off
Off
100K
100K
100K
Rb1
Rb2
VDD
MOD_0
AKS_1
AKS_0
100nF
Vdd / Vss
Vdd / Vss
Vdd / Vss
Css
Vdd
Vdd
Vdd
2.2K
2.2K
2.2K
R
R
R
S1
S0
S2
Recommended Rb1, Rb2 Values
QT1101 R4.06/0806
4.7nF
4.7nF
4.7nF
2.8
3.0 ~ 3.59V
Vdd Range
Vdd Range
2.8 ~ 2.99V
3.0 ~ 3.59V
C
C
C
With Spread-Spectrum
S0
S1
S2
3.6 ~ 5V
No Spread-Spectrum
3.6 ~ 5V
~ 2.99V
2W DATA
DATA
/CHANGE
R
R
R
dni = do not install
10K
10K
10K
SNS1
SNS0
SNS2
12K
12K
15K
Rb1
Rb1
15K
18K
20K
KEY 2
Rb2
22K
Rb2
KEY 1
KEY 0
27K
27K
dni
dni
dni