© Semiconductor Components Industries, LLC, 2013
October, 2017 − Rev. 3
1 Publication Order Number:
LC717A00AR/D
LC717A00AR
Capacitance‐Digital‐Converter
LSI for Electrostatic
Capacitive Touch Sensors
Overview
The LC717A00AR is a high-performance, low-cost capacitance-
digital-converter LSI for electrostatic capacitive touch sensor,
especially focused on usability. It has 8 channels capacitance-sensor
input. The built-in logic circuit can detect the state (ON/OFF) of each
input and output the result. This makes it ideal for various switch
applications.
The calibration function is automatically performed by the built-in
logic circuit during power activation or whenever there are
environmental changes. In addition, since initial settings of
parameters, such as gain, are configured, LC717A00AR can operate
as stand-alone when the recommended switch pattern is applied.
Also, since LC717A00AR has a serial interface compatible with
I
2
Ct and SPI bus, parameters can be adjusted using external devices
whenever necessary. Moreover, outputs of the 8-input capacitance
data can be detected and measured as 8-bit data.
Features
Detection System: Differential Capacitance Detection
(Mutual Capacitance Type)
Input Capacitance Resolution: Can Detect Capacitance Changes in
the Femto Farad Order
Measurement Interval (8 Differential Inputs):
18 ms (Typ) (at Initial Configuration)
3 ms (Typ) (at Minimum Interval Configuration)
External Components for Measurement: Not Required
Current Consumption:
320 mA (Typ) (V
DD
= 2.8 V)
740 mA (Typ) (V
DD
= 5.5 V)
Supply Voltage: 2.6 V to 5.5 V
Detection Operations: Switch
Packages: VCT28
Interface: I
2
C Compatible Bus or SPI Selectable
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VCT28
CASE 601AE
MARKING DIAGRAM
See detailed ordering and shipping information on page 11 o
f
this data sheet.
ORDERING INFORMATION
XXXXX = Specific Device Code
Y = Year
M = Month
DDD = Additional Traceability Data
XXXXXXXX
YMDDD
LC717A00AR
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2
Specifications
Table 1. ABSOLUTE MAXIMUM RATINGS
(T
A
= 25°C, V
SS
= 0 V)
Parameter Symbol Ratings Unit Remarks
Supply Voltage V
DD
−0.3 to +6.5 V
Input Voltage V
IN
−0.3 to V
DD
+ 0.3 V (Note 1)
Output Voltage V
OUT
−0.3 to V
DD
+ 0.3 V (Note 2)
Power Dissipation P
d
max
160 mW
T
A
= +105_C, Mounted on a substrate (Note 3)
Peak Output Current I
OP
±8 mA Per terminal, 50% Duty ratio (Note 2)
Total Output Current I
OA
±40 mA Output total value of LSI, 25% Duty ratio
Storage Temperature T
stg
−55 to +125
_C
Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality
should not be assumed, damage may occur and reliability may be affected.
1. Apply to Cin0 to 7, Cref, nRST, SCL, SDA, SA, SCK, SI, nCS, GAIN.
2. Apply to Cdrv, Pout0 to 7, SDA, SO, ERROR, INTOUT.
3. 4-layer glass epoxy board (40 × 50 × 0.8t mm).
Table 2. RECOMMENDED OPERATING CONDITIONS
Parameter Symbol Conditions Min Typ Max Unit Remarks
Operating Supply Voltage V
DD
2.6 5.5 V
Supply Ripple + Noise V
PP
±20 mV (Note 4)
Operating Temperature T
opr
−40 25 105
_C
Functional operation above the stresses listed in the Recommended Operating Ranges is not implied. Extended exposure to stresses beyond
the Recommended Operating Ranges limits may affect device reliability.
4. Inserting a high-valued capacitor and a low-valued capacitor in parallel between V
DD
and V
SS
is recommended. In this case, the small-valued
capacitor should be at least 0.1 mF, and is mounted near the LSI.
Table 3. ELECTRICAL CHARACTERISTICS
(V
SS
= 0 V, V
DD
= 2.6 to 5.5 V, T
A
= −40 to +105°C, Unless otherwise specified, the Cdrv drive frequency is f
CDRV
= 143 kHz.
Not tested at low temperature before shipment.)
Parameter Symbol Conditions Min Typ Max Unit Remarks
Capacitance Detection Resolution N 8 bit
Output Noise RMS N
RMS
Minimum gain setting ±1.0 LSB (Notes 5, 7)
Input Offset Capacitance
Adjustment Range
Coff
RANGE
±8.0
pF
(Notes 5, 7)
Input Offset Capacitance
Adjustment Resolution
Coff
RESO
8
bit
Cin Offset Drift Cin
DRIFT
Minimum gain setting ±8
LSB
(Note 5)
Cin Detection Sensitivity Cin
SENSE
Minimum gain setting 0.04 0.12
LSB/fF
(Note 6)
Cin Pin Leak Current I
Cin
Cin = Hi−Z ±25 ±500
nA
Cin Allowable Parasitic Input
Capacitance
Cin
SUB
Cin against V
SS
30
pF
(Notes 5, 7)
Cdrv Drive Frequency f
CDRV
100 143 186
kHz
Cdrv Pin Leak Current I
CDRV
Cdrv = Hi−Z ±25 ±500
nA
nRST Minimum Pulse Width t
NRST
1
ms
Power-on Reset Time t
POR
20 ms
Power-on Reset Operation
Condition: Hold Time
t
POROP
10 ms (Note 5)
Power-on Reset Operation
Condition: Input Voltage
V
POROP
0.1 V (Note 5)
LC717A00AR
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3
Table 3. ELECTRICAL CHARACTERISTICS (continued)
(V
SS
= 0 V, V
DD
= 2.6 to 5.5 V, T
A
= −40 to +105°C, Unless otherwise specified, the Cdrv drive frequency is f
CDRV
= 143 kHz.
Not tested at low temperature before shipment.)
Parameter RemarksUnitMaxTypMinConditionsSymbol
Power-on Reset Operation
Condition: Power Supply Rise Rate
t
VDD
0 V to V
DD
1 V/ms (Note 5)
Pin Input Voltage
V
IH
High input 0.8 V
DD
V (Notes 5, 8)
V
IL
Low input 0.2 V
DD
Pin Output Voltage
V
OH
High output
(I
OH
= +3 mA)
0.8 V
DD
V (Note 9)
V
OL
Low output
(I
OL
= −3 mA)
0.2 V
DD
SDA Pin Output Voltage V
OL
I
2
C
SDA Low output
(I
OL
= −3 mA)
0.4 V
Pin Leak Current I
LEAK
±1
mA
(Note 10)
Current Consumption I
DD
When stand-alone
configuration and
non-touch
V
DD
= 2.8 V
320 390 mA
(Notes 5, 7)
When stand-alone
configuration and
non-touch
V
DD
= 5.5 V
740 900
I
STBY
During Sleep process 1
mA
(Note 7)
Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product
performance may not be indicated by the Electrical Characteristics if operated under different conditions.
5. Design-guaranteed values (not tested before shipment).
6. Measurements conducted using the test mode in the LSI.
7. T
A
= +25_C.
8. Apply to nRST, SCL, SDA, SA, SCK, SI, nCS, GAIN.
9. Apply to Cdrv, Pout0 to 7, SO, ERROR, INTOUT.
10.Apply to nRST, SCL, SDA, SA, SCK, SI, nCS, GAIN.

LC717A00AR-NH

Mfr. #:
Manufacturer:
ON Semiconductor
Description:
Capacitive Touch Sensors DISPLAY DEVICE OTHERS
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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