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  ON Semiconductor Electronic Components Datasheet  

LC717A10AR Datasheet

Capacitance-Digital-Converter LSI

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LC717A10AR pdf
Ordering number : ENA2161
LC717A10AR
CMOS LSI
Capacitance-Digital-Converter LSI
for Electrostatic Capacitive Touch
Sensors
http://onsemi.com
Overview
The LC717A10AR is a high-performance and low-cost capacitance-digital-converter LSI for electrostatic capacitive
touch sensor, especially focused on usability.
It has 16 channels capacitance-sensor input. This makes it ideal for use in the products that need many switches.
Since the calibration function and the judgment of ON/OFF are automatically performed in LSI internal, it can make
development time more short. A detection result (ON/OFF) for each input can be read out by the serial interface (I2C
compatible bus or SPI).
Also, measurement value of each input can be read out as 8-bit digital data. Moreover, gain and other parameters can
be adjusted using serial interface.
Features
Detection system: Differential capacitance detection (Mutual capacitance type)
Input capacitance resolution: Can detect capacitance changes in the femto Farad order
Measurement interval (16 differential inputs): 30ms (Typ) (at initial configuration),
6ms (Typ) (at minimum interval configuration)
External components for measurement: Not required
Interface: I2C * compatible bus or SPI selectable.
Current consumption: 570μA (Typ) (VDD = 2.8V), 1.3mA (Typ) (VDD = 5.5V)
Supply voltage: 2.6V to 5.5V
Detection operations: Switch
Packages: VCT28
* I2C Bus is a trademark of Philips Corporation.
Semiconductor Components Industries, LLC, 2013
August, 2013
Ver1.0.1
D1912HKPC 20121129-S00004 No.A2161-1/11


  ON Semiconductor Electronic Components Datasheet  

LC717A10AR Datasheet

Capacitance-Digital-Converter LSI

No Preview Available !

LC717A10AR pdf
LC717A10AR
Specifications
Absolute Maximum Ratings at Ta = +25°C
Parameter
Symbol
Supply voltage
Input voltage
Output voltage
Power dissipation
VDD
VIN
VOUT
Pd max
Ratings (VSS = 0V)
-0.3 to +6.5
-0.3 to VDD+0.3
-0.3 to VDD+0.3
160
Unit
V
V
V
mW
Storage temperature
Tstg
-55 to +125
*1) Apply to Cin0 to 15, Cref, CrefAdd, nRST, SCL, SDA, SA0, SA1, SCK, SI, nCS
*2) Apply to Cdrv, SDA, SO, INTOUT
*3) 4-layer glass epoxy board (40×50×0.8t mm)
°C
Remarks
*1
*2
Ta = +105°C,
Mounted on a substrate *3
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating
Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability.
Recommended Operating Conditions
Parameter
Symbol
Conditions
min typ max Unit Remarks
Operating supply voltage
Supply ripple + noise
VDD
Vpp
2.6 5.5 V
±20 mV
*1
Operating temperature
Topr
-40 25
*1) We recommend connecting large and small capacitance between VDD and VSS.
In this case, the small capacitance is equal to or more than 0.1μF, and layout nearby LSI.
105
°C
Electrical Characteristics at VSS = 0V, VDD = 2.6 to 5.5V, Ta = -40 to +105°C
* Unless otherwise specified, the Cdrv drive frequency is fCDRV = 143kHz.
* Not tested at low temperature before shipment.
Parameter
Symbol
Conditions
min typ
Capacitance detection resolution N
Output noise RMS
Input offset capacitance
adjustment range
Input offset capacitance
adjustment resolution
Cin offset drift
Cin detection sensitivity
Cin pin leak current
Cin allowable parasitic input
capacitance
Cdrv drive frequency
Cdrv pin leak current
nRST minimum pulse width
Power-on reset time
Power-on reset operation
condition: Hold time
Power-on reset operation
condition: Input voltage
Power-on reset operation
condition: Power supply rise rate
NRMS
CoffRANGE
CoffRESO
CinDRIFT
CinSENSE
ICin
CinSUB
fCDRV
ICDRV
tNRST
tPOR
tPOROP
VPOROP
tVDD
minimum gain setting
minimum gain setting
minimum gain setting
Cin = Hi-Z
Cin against VSS
Cdrv = Hi-Z
0V to VDD
0.04
±8.0
8
±25
100 143
±25
1
10
1
max
8
±1.0
Unit
bit
LSB
pF
Remarks
*1 *3
*1 *3
±8
0.12
±500
bit
LSB
LSB/fF
nA
30
186
±500
20
pF
kHz
nA
μs
ms
ms
*1
*2
*1 *3
*1
*1
*1
0.1 V
V/ms
*1
*1
Continued to the next page.
No.A2161-2/11


Part Number LC717A10AR
Description Capacitance-Digital-Converter LSI
Maker ON Semiconductor
Total Page 11 Pages
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