QT320-IS Atmel, QT320-IS Datasheet - Page 12

• Manufacturer Part Number: QT320-IS
• Description: SENSOR IC TOUCH PROG 2CH 8-SOIC
• Manufacturer: Atmel
• Series: QProx™r
• Type: Capacitiver

Specifications of QT320-IS

• Rohs Status: RoHS non-compliant
• Touch Panel Interface: 2, 2-Wire
• Number Of Inputs/keys: 2 Key
• Resolution (bits): 16 b
• Data Interface: Serial
• Voltage Reference: Internal
• Voltage - Supply: 1.8 V ~ 5.25 V
• Current - Supply: 600µA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-SMD (300 mil)
• Output Type: *
• Interface: *
• Input Type: *
• Other names: 427-1031

TABLE 4-1 SETUPS SUMMARY CHART
Note 1: Tbs is the combined (summed) burst duration of Channel1 and Channel2 (Tbd).
Note 2: Tbs is variable with the voltage, see figure 5-7. If Tbd is longer than 10ms,Tbs is Tbd plus the sleep time find on figure 5-7.
Note 5: The sleep period time is find on figure 5-7(equivalent at 1 sleep period).
lQ
Channel 1
Channel 2
Channels
Common
Features
Specific
Specific
To Both
Description
Max-On Duration
Max-On Duration
Det Integrator A
Det Integrator B
Det Integrator A
Det Integrator B
Compensation
Compensation
Negative Drift
Output Mode
Output Mode
Positive Drift
Sleep Cycles
Hysteresis
Hysteresis
Threshold
Threshold
DI Speed
Symbol
MOD1
MOD2
DIAT1
DIBT1
DIAT2
DIBT2
THR1
HYS1
OUT1
THR2
HYS2
OUT2
NDC
PDC
DIS
SC
1 - 256
0 - 254
1 - 256
0 - 254
0 - 254
0 - 254
1 - 255
1 - 16
0 - 16
1 - 16
0 - 16
1 - 6
1 - 6
255
255
255
255
0
1
2
0
1
2
0
1
0
Valid Values
Active High
Active Low
Active High
Active Low
No Sleep
Infinite
Toggle
Infinite
Toggle
Sleep
Finite
Finite
Slow
Fast
On
Off
On
Off
-
-
-
-
-
-
-
-
14 (~10s at 3V)
14 (~10s at 3V)
100 (~4.36s/bit
2 (~0.13s/bit
1 (~47ms Tbs
Default
@ 3V)
@ 3V)
@ 3V)
12
10
10
6
2
6
0
6
2
6
0
1
SC = 0
SC > 0
SC = 0
SC > 0
SC = 0
SC > 0
SC = 0
SC > 0
Higher = longer to detect, more noise immune
Higher = longer to detect, more noise immune
Value taken from DIAT1 but truncated to 6
Value taken from DIAT2 but truncated to 6
Requires pullup resistor on OUT1
Requires pullup resistor on OUT2
Burst rep interval = Tbs = SC x Ti
Tmod = (MOD1 + 1) x 16 x Tbs
Tmod = (MOD1 + 1) x 256 x Tbs (note1)
Tmod = (MOD2 + 1) x 256 x Tbs (note1)
Tmod = (MOD2 +1) x 16 x Tbs
Tpdc = (PDC + 1) x Tbs
Tndc = (NDC + 1) x Tbs
Tpdc = (PDC + 1) x 16 x Tbs (note1)
Tndc = (NDC + 1) x 16 x Tbs (note1)
Higher = more hysteresis
Higher = more hysteresis
Calculation / Notes
Higher = less sensitive
Higher = less sensitive
-
-
(note2)
(note2)
(note2)
(note2)
QT320/R1.03 08/02
Seconds / bit
Seconds / bit
Burst Cycles
Burst Cycles
Seconds
Seconds
change
change
Counts
Counts
Counts
Counts
Counts
Unit
-
-
-
-
-
-
-
-