QST102 STMicroelectronics, QST102 Datasheet - Page 18

• Manufacturer Part Number: QST102
• Description: Capacitive Touch Sensor Device 2 Keys With Individual Key State Outputs
• Manufacturer: STMicroelectronics

Electrical characteristics
6.3.2
6.3.3
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Electro magnetic interference (EMI)
The product is monitored in terms of emission. This emission test is in line with the norm
SAE J 1752/3 which specifies the board and the loading of each pin.
Table 8.
1. Data based on characterization results, not tested in production.
Absolute maximum ratings (electrical sensitivity)
Based on three different tests (ESD, LU and DLU) using specific measurement methods, the
product is stressed in order to determine its performance in terms of electrical sensitivity.
For more details, refer to the application note AN1181.
Electro-static discharge (ESD)
Electro-Static Discharges (a positive then a negative pulse separated by 1 second) are
applied to the pins of each sample according to each pin combination. The sample size
depends on the number of supply pins in the device (3 parts*(n+1) supply pin). Two models
can be simulated: Human Body Model and Charge Device Model. These tests comply with
JESD22-A114A/A115A specifications.
Table 9.
1. Data based on characterization results, not tested in production.
Static and dynamic latch-up
●
●
For more details, refer to the application note AN1181.
V
V
Symbol
Symbol
ESD(HBM)
ESD(CDM)
S
EMI
LU: 3 complementary static tests are required on 10 parts to assess the latch-up
performance. A supply overvoltage (applied to each power supply pin) and a current
injection (applied to each input, output and configurable I/O pin) are performed on each
sample. This test conforms to the EIA/JESD 78 IC latch-up standard.
DLU: Electro-Static Discharges (one positive then one negative test) are applied to
each pin of 3 samples when the micro is running to assess the latch-up performance in
dynamic mode. Power supplies are set to the typical values, the oscillator is connected
as near as possible to the pins of the micro and the component is put in reset mode.
This test conforms to the IEC1000-4-2 and SAEJ1752/3 standards.
Peak level
Parameter
Electro-static discharge voltage
(Human Body Model)
Electro-static discharge voltage
(Charge Device Model)
EM emissions
Absolute maximum ratings
Ratings
V
complies with SAE J
1752/3
DD
=5V, T
Conditions
A
=+25°C,
T
T
A
A
30 MHz to 130 MHz
=+25°C
=+25°C
0.1 MHz to 30 MHz
130 MHz to 1 GHz
Frequency Band
SAE EMI Level
Conditions
Monitored
Maximum value
f
DEVICE
4000
500
= 4 MHz
2.5
20
20
13
(1)
(1)
QST102
dBμV
Unit
Unit
-
V
V