LC717A30UR Capacitance-Digital-Converter LSI Datasheet

LC717A30UR Datasheet, PDF, Equivalent


Part Number

LC717A30UR

Description

Capacitance-Digital-Converter LSI

Manufacture

ON Semiconductor

Total Page 14 Pages
Datasheet
Download LC717A30UR Datasheet


LC717A30UR
LC717A30UR
Capacitance‐Digital‐Converter
LSI for Electrostatic
Capacitive Touch Sensors
The LC717A30UR is a high performance, low cost, and highly
usable capacitance converter for electrostatic capacitive touch and
proximity sensors.
8 capacitance-sensing input channels ideal for use in any end
products that needs an array of switches. The LC717A30UR facilitates
a short system development time through its automatic calibration
function and minimal external components. The detection result
(ON/OFF) for each sensor is read out by the serial interface (I2C or
SPI).
Features
Differential Capacitive Detection Using Mutual Capacitance
Operates with Small to Large Capacitance Sensor Input Pads
Capacitance Detection Down to Femto-Farad Level
Measurement Time 16 ms for 8 Sensors
Minimal External Components
Selectable Interface: I2C or SPI
Current Consumption: 0.8 mA (VDD = 5.5 V)
Supply Voltage: 2.6 V to 5.5 V
AECQ100 Qualified and PPAP Capable
Typical Applications
Automotive: Smart Key, Control Switches, Car Audio, Proximity
Consumer: Home Appliance, White Goods, Induction Cooking
Industrial: Security Lock
Computing: PC Peripherals, Audio Visual Equipment
Lighting: Remote Control Switches
www.onsemi.com
Top View
Bottom View
VCT28 3.5 y 3.5
CASE 601AE
MARKING DIAGRAM
XXXXXXXX
YMDDD
XXXXX = Specific Device Code
Y = Year
M = Month
DDD = Additional Traceability Data
ORDERING INFORMATION
See detailed ordering and shipping information on page 9 of
this data sheet.
Main
Microcomputer
GPIO
EXTINT
I2C/SPI
VDD or VSS
Cref CrefAdd
nCS CdrvBar
SCL/SCK CMAdd0
SDA/SI CMAdd4
SA0/SO
Cin0
Cin1
nRST
INOUT
Cin6
Cin7
IFSEL
Cdrv
LC717A30UR
Figure 1. Application Schematic 1
Cref
SW1
SW2
SW7
SW8
© Semiconductor Components Industries, LLC, 2018
November, 2018 Rev. 0
1
Publication Order Number:
LC717A30UR/D

LC717A30UR
LC717A30UR
8 small capacitance sensors channels and 4-wire SPI interface.
4 pF
Main
Microcomputer
GPIO
EXTINT
(open)
Cref CrefAdd
nCS
SCL/SCK
SDA/SI
SA0/SO
CdrvBar (open)
CMAdd0 (open)
CMAdd4 (open)
nRST
INTOUT
Cin0
Cin1
Cin2
Cin3
IFSEL
Cin4
Cin5
Cin6
Cin7
Cdrv
LC717A30UR
Figure 2. Application Schematic 2
SW1 (Small capacitance: e.g. 4 pF)
SW2 (Small capacitance: e.g. 4 pF)
SW3 (Small capacitance: e.g. 4 pF)
SW4 (Small capacitance: e.g. 4 pF)
SW5 (Small capacitance: e.g. 4 pF)
SW6 (Small capacitance: e.g. 4 pF)
SW7 (Small capacitance: e.g. 4 pF)
SW8 (Small capacitance: e.g. 4 pF)
8 large capacitance sensors and I2C interface.
20 pF
Main
Microcomputer
GPIO
EXTINT
VDD
VDD
(open)
Cref CrefAdd
nCS
SCL/SCK
SDA/SI
SA0/SO
CdrvBar
CMAdd0
CMAdd4
nRST
INTOUT
Cin0
Cin1
Cin2
Cin3
IFSEL
Cin4
Cin5
Cin6
Cin7
16 pF
16 pF
16 pF
Cdrv
LC717A30UR
Figure 3. Application Schematic 3
SW1 (Big capacitance: e.g. 20 pF)
SW2 (Big capacitance: e.g. 20 pF)
SW3 (Big capacitance: e.g. 20 pF)
SW4 (Big capacitance: e.g. 20 pF)
SW5 (Big capacitance: e.g. 20 pF)
SW6 (Big capacitance: e.g. 20 pF)
SW7 (Big capacitance: e.g. 20 pF)
SW8 (Big capacitance: e.g. 20 pF)
www.onsemi.com
2


Features LC717A30UR Capacitance‐Digital‐Conv erter LSI for Electrostatic Capacitive Touch Sensors The LC717A30UR is a high performance, low cost, and highly usab le capacitance converter for electrosta tic capacitive touch and proximity sens ors. 8 capacitance-sensing input channe ls ideal for use in any end products th at needs an array of switches. The LC71 7A30UR facilitates a short system devel opment time through its automatic calib ration function and minimal external co mponents. The detection result (ON/OFF) for each sensor is read out by the ser ial interface (I2C or SPI). Features Differential Capacitive Detection Usi ng Mutual Capacitance • Operates with Small to Large Capacitance Sensor Inpu t Pads • Capacitance Detection Down t o Femto-Farad Level • Measurement Tim e 16 ms for 8 Sensors • Minimal Exter nal Components • Selectable Interface : I2C or SPI • Current Consumption: 0 .8 mA (VDD = 5.5 V) • Supply Voltage: 2.6 V to 5.5 V • AEC−Q100 Qualified and PPAP Capable Typical Applications • Automo.
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