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PDF LC717A00AJ Data sheet ( Hoja de datos )

Número de pieza LC717A00AJ
Descripción Capacitance-Digital-Converter LSI
Fabricantes Sanyo Semicon Device 
Logotipo Sanyo Semicon Device Logotipo



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Ordering number : ENA2089A
CMOS LSI
LC717A00AJ Capacitance-Digital-Converter LSI
for Electrostatic Capacitive Touch
Sensors
Overview
The LC717A00AJ 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,
LC717A00AJ can operate as stand-alone when the recommended switch pattern is applied.
Also, since LC717A00AJ has a serial interface compatible with I2C 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): 18ms (Typ) (at initial configuration),
3ms (Typ) (at minimum interval configuration)
External components for measurement: Not required
Current consumption: 320μA (Typ) (VDD = 2.8V), 740μA (Typ) (VDD = 5.5V)
Supply voltage: 2.6V to 5.5V
Detection operations: Switch
Packages: SSOP30
Interface: I2C * compatible bus or SPI selectable.
* I2C Bus is a trademark of Philips Corporation.
Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to
"standard application", intended for the use as general electronics equipment. The products mentioned herein
shall not be intended for use for any "special application" (medical equipment whose purpose is to sustain life,
aerospace instrument, nuclear control device, burning appliances, transportation machine, traffic signal system,
safety equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives
in case of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any
guarantee thereof. If you should intend to use our products for new introduction or other application different
from current conditions on the usage of automotive device, communication device, office equipment, industrial
equipment etc. , please consult with us about usage condition (temperature, operation time etc.) prior to the
intended use. If there is no consultation or inquiry before the intended use, our customer shall be solely
responsible for the use.
Specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein stipulate
the performance, characteristics, and functions of the described products in the independent state, and are not
guarantees of the performance, characteristics, and functions of the described products as mounted in the
customer's products or equipment. To verify symptoms and states that cannot be evaluated in an independent
device, the customer should always evaluate and test devices mounted in the customer's products or
equipment.
Ver1.0.1
D1912HKPC 20121129-S00003/71112HK No.A2089-1/11

1 page




LC717A00AJ pdf
LC717A00AJ
Power-on Reset (POR)
When power is turned on, power-on reset is enabled inside the LSI and its state is released after a certain power-on reset
time, tPOR. Power-on reset operation condition: Power supply rise rate tVDD must be at least 1V/ms.
Since INTOUT pin changes from “High” to “Low” at the same time as the released of power-on reset state, it is
possible to verify the tPOR externally.
During power-on reset state, Cin, Cref and Pout are unknown.
VDD
tVDD
tPOR
POR
(LSI internal signal)
RESET
RELEASE
VPOROP
tPOROP
tPOR
UNKNOWN RESET
RELEASE
INTOUT
VALID UNKNOWN
Cin,
Cref,
Pout
UNKNOWN
VALID
UNKNOWN
I2C Compatible Bus Data Timing
fig.1
SDA
10%
90%
10%
SCL
tLOW
tHD;DTA tSU;DTA
90% 90%
90%
10% 10%
10%
tHIGH
10%
tHD;STA
tr tf
START
condition
tSU;STA
90%
90%
10%
tHD;STA
90%
repeated START
condition
fig.2
90%
10%
tSU;STO
tBUF
90%
10%
90%
STOP
condition
START
condition
I2C Compatible Bus Communication Formats
Write format (data can be written into sequentially incremented addresses)
START
Slave Address
Write=L ACK
Slave
Register Address (N)
ACK Data written to Register Address (N) ACK Data written to Register Address (N+1) ACK STOP
Slave
fig.3
Slave
Slave
Read format (data can be read from sequentially incremented addresses)
START
Slave Address
RESTART
Slave Address
Write=L ACK
Slave
Register Address (N)
ACK
Slave
Read=H ACK Data read from Register Address (N) ACK Data read from Register Address (N+1) ACK Data read from Register Address (N+2) NACK STOP
Slave
Master
fig.4
Master
Master
No.A2089-5/11

5 Page





LC717A00AJ arduino
LC717A00AJ
nCS
Interface selection / Chip-select-inverting input (SPI)
Selection of I2C compatible bus mode or SPI mode is through this terminal. After initialization, the LSI is
automatically in I2C compatible bus mode. To continually use I2C compatible bus mode, fix nCS pin to “High”. To
switch to SPI mode after LSI initialization, change the nCS input “High” “Low”. The nCS pin is used as the chip-
select-inverting input pin of SPI, and SPI mode is kept until LSI is again initialized.
If interface is not to be used, fix the pin to “High”.
nRST
It is the external-reset-signal-inverting-input pin. When nRST pin is “Low”, LSI is in the reset state.
Each pin (Cin0 to 7, Cref, Pout,0 to 7, ERROR) is “Hi-Z” during reset state.
SDA/SI
Data input and output (I2C) / Data input (SPI)
It is the data input and output pin of the I2C compatible bus or the data input pin of the SPI depending on the mode of
operation.
If interface is not to be used, fix the pin to “High”. However, even if interface is not to be used, providing a
communication terminal on board is still recommended.
SA/SO
Slave address selection (I2C) / Data output (SPI)
It is the slave address selection pin of the I2C compatible bus or the data output pin of the SPI depending on the mode
of operation.
If interface is not to be used, fix the pin to “High”. However, even if interface is not to be used, providing a
communication terminal on board is still recommended.
SANYO Semiconductor Co.,Ltd. assumes no responsibility for equipment failures that result from using
products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition
ranges, or other parameters) listed in products specifications of any and all SANYO Semiconductor Co.,Ltd.
products described or contained herein.
Regarding monolithic semiconductors, if you should intend to use this IC continuously under high temperature,
high current, high voltage, or drastic temperature change, even if it is used within the range of absolute
maximum ratings or operating conditions, there is a possibility of decrease reliability. Please contact us for a
confirmation.
SANYO Semiconductor Co.,Ltd. strives to supply high-quality high-reliability products, however, any and all
semiconductor products fail or malfunction with some probability. It is possible that these probabilistic failures or
malfunction could give rise to accidents or events that could endanger human lives, trouble that could give rise
to smoke or fire, or accidents that could cause damage to other property. When designing equipment, adopt
safety measures so that these kinds of accidents or events cannot occur. Such measures include but are not
limited to protective circuits and error prevention circuits for safe design, redundant design, and structural
design.
In the event that any or all SANYO Semiconductor Co.,Ltd. products described or contained herein are
controlled under any of applicable local export control laws and regulations, such products may require the
export license from the authorities concerned in accordance with the above law.
No part of this publication may be reproduced or transmitted in any form or by any means, electronic or
mechanical, including photocopying and recording, or any information storage or retrieval system, or otherwise,
without the prior written consent of SANYO Semiconductor Co.,Ltd.
Any and all information described or contained herein are subject to change without notice due to
product/technology improvement, etc. When designing equipment, refer to the "Delivery Specification" for the
SANYO Semiconductor Co.,Ltd. product that you intend to use.
Upon using the technical information or products described herein, neither warranty nor license shall be granted
with regard to intellectual property rights or any other rights of SANYO Semiconductor Co.,Ltd. or any third
party. SANYO Semiconductor Co.,Ltd. shall not be liable for any claim or suits with regard to a third party's
intellectual property rights which has resulted from the use of the technical information and products mentioned
above.
This catalog provides information as of December, 2012. Specifications and information herein are subject
to change without notice.
PS No.A2089-11/11

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