qt1080 Quantum Research Group, qt1080 Datasheet - Page 6

• Manufacturer Part Number: qt1080
• Description: 8 Key Qtouch? Sensor Ic
• Manufacturer: Quantum Research Group

SMR resistor installed between SNS6K and SNS7.
Table 1.6
AKS Resistor Options
Table 1.7
Functions in Simplified Mode
lQ
KEY 3
KEY 4
KEY 5
KEY 6
KEY 7
DETECT OUT
Vunreg
LP IN
R
R
R
R
R
SNS3
SNS4
SNS5
SNS6
10K
10K
10K
10K
SNS7
10K
4.7nF
4.7nF
4.7nF
4.7nF
4.7nF
*4.7uF
Figure 1.2 Connection Diagram - Simplified Mode; Shown for 32-QFN
C
C
C
C
C
S3
S4
S5
S6
S7
R
R
R
R
R
S7
S3
S4
S5
S6
Voltage Reg
2.2K
2.2K
2.2K
2.2K
2.2K
+2.8 ~ +5V
Output Drive, Polarity
SYNC/LP pin
Max on-duration delay
Detect Pin
SMR
AKS_0
*4.7uF
Vdd
Vss
1M
15
12
13
16
17
18
19
20
21
22
23
24
*100nF
SNS3
SNS3K
SNS4
SNS4K
SNS5
SNS5K
SNS6
SNS6K
SNS7
SNS7K
VSS
SYNC/LP
DETECT
VDD
AKS MODE
On, global
VDD
QT1080
32-QFN
3
Off
Direct outputs, push-pull, active high
200ms nom LP function; sync not available
60 seconds (nom)
Active high on any detect
/RST
6
2
OUT_7
OUT_6
OUT_5
OUT_4
OUT_3
OUT_2
OUT_1
OUT_0
SNS2K
SNS1K
SNS0K
SNS2
SNS1
SNS0
OSC
SS
FAST-DETECT
11
10
9
8
7
6
4
1
32
31
30
29
28
27
26
25
Rb1
Rb2
Enabled
VDD
Off
1M
The required value of spread-spectrum capacitor C
will vary according to the lengths of the acquire bursts,
see Section 3.2. A typical value of C is 100nF.
AKS_0
Recommended Rb1, Rb2 Values
Vdd / Vss
C
SS
Vdd Range
2.8 ~ 3.59V
3.6 ~ 5V
2.2K
2.2K
2.2K
R
R
R
S0
S1
S2
12K
15K
Rb1
4.7nF
4.7nF
4.7nF
QT1080 R11.06/0806
C
C
C
S0
S1
S2
Rb2
22K
27K
OUT_7
OUT_6
OUT_5
OUT_4
OUT_3
OUT_2
OUT_1
OUT_0
OUT_0
R
R
R
10K
10K
10K
SNS1
SNS2
SNS0
SS
KEY 2
KEY 1
KEY 0
SS