E1081 Atmel, E1081 Datasheet - Page 6

• Manufacturer Part Number: E1081
• Description: KIT EVAL/DEV USING QT1081-ISG
• Manufacturer: Atmel
• Series: Quantum, QTouch™r

Specifications of E1081

• Sensor Type: Touch, Capacitive
• Sensing Range: 9 Buttons/Keys
• Voltage - Supply: 3V
• Embedded: No
• Utilized Ic / Part: QT1081
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Interface: -
• Sensitivity: -

lQ
AKS / Fast-Detect Options
KEY 4
KEY 3
KEY 5
KEY 6
KEY 7
SYNC or LP IN
Polarity and Output
SYNC/LP Function
Max On-Duration
DETECT OUT
Table 1.3
Table 1.4
Table 1.2
Table 1.5
Vunreg
*4.7uF
OUT_D
POL
Vdd / Vss
MOD_1
Vdd / Vss
Vdd / Vss
SL_0
Vdd / Vss
SL_1
Vdd / Vss
Keep these parts
Voltage Reg
+2.8 ~ +5V
close to the IC
R
R
R
SNS4
R
SNS7
SNS3
10K
R
SNS6
10K
10K
10K
10K
SNS5
Figure 1.1 Connection Diagram - Full Options
MOD_1
OUT_D
AKS_1
*4.7uF
1M
1nF
1M
1M
1nF
1M
1nF
1nF
1nF
1M
SL_1
Vdd
Vdd
Vdd
Vdd
Vdd
Vdd
Vdd
Vdd
Vss
Vss
Vss
Vss
Vss
Vss
Vss
Vss
C
C
C
S4
S3
S7
*100nF
15
16
22
19
20
12
13
14
18
21
23
24
SNS4K
SNS3
SNS3K
SNS4
SNS5
SNS5K
SNS6
SNS6K
SNS7
SNS7K
VSS
SYNC/LP
DETECT
MOD_0
AKS_0
SL_0
POL
Vss
Vdd
Vss
Vdd
Vss
Vdd
Vss
Vdd
Vss
Vdd
Vss
Vdd
Vss
Vdd
Vss
Vdd
VDD
QT1081
32-QFN
VDD
3
6
/RST
AKS MODE
Off
Off
On, in 2 groups
On, global
MAX ON-DURATION MODE
10 seconds (nom) to recalibrate
60 seconds (nom) to recalibrate
Infinite (disabled)
(reserved)
OUT_n, DETECT PIN MODE
Binary coded, active high, push-pull
One-per-key, active low, open-drain
One-per-key, active high, push-pull
One-per-key, active low, push-pull
SYNC/LP PIN MODE
Sync
LP mode: 100ms nom response time
LP mode: 180ms nom response time
LP mode: 340ms nom response time
2
OUT_7
OUT_6
OUT_5
OUT_4
OUT_3
OUT_2
OUT_1
OUT_0
SNS1K
SNS0K
SNS2K
SNS2
SNS1
SNS0
OSC
SS
* Note: one bypass capacitor to be tightly wired
10
8
4
9
7
6
11
32
31
30
29
28
27
26
25
Rb1
Rb2
1
between Vdd and Vss. Follow manufacturer’s
recommendations for input and output capacitors.
1nF
1nF
1nF
VDD
Keep these parts
C
C
C
close to the IC
S2
S1
S0
FAST-DETECT
Off
Enabled
Off
Off
The required value of spread-spectrum capacitor CSS
will vary according to the lengths of the acquire bursts,
see Section 3.2. A typical value of
1M
1M
1M
R
R
R
SNS2
SNS1
SNS0
C
10K
SS
Vdd / Vss
10K
10K
MOD_0
AKS_1
AKS_0
Vdd / Vss
Vdd / Vss
Recommended Rb1, Rb2 Values
2.8 ~ 3.59V
QT1081_1R0.04_0307
Vdd Range
3.6 ~ 5V
OUT_7
OUT_6
OUT_5
OUT_4
OUT_3
OUT_2
OUT_1
OUT_0
OUT_0
CSS
12K
15K
Rb1
is 100nF.
Binary coded
output mode
KEY 0
KEY 1
KEY 2
22K
Rb2
27K