Power Mode............................................................................................................................................................................... 6
Interface with the Host ............................................................................................................................................................... 8
Packaging Information ............................................................................................................................................................. 12
Index ........................................................................................................... ........................................................................................ 16
The Microchip Web Site ....................................................................................................................................................................... 17
Customer Change Notification Service ................................................................................................................................................ 17
Customer Support ................................................................................................................................................................................ 17
Product Identification System .............................................................................................................................................................. 18
TO OUR VALUED CUSTOMERS
It is our intention to provide our valued customers with the best documentation possible to ensure successful use of your Microchip
products. To this end, we will continue to improve our publications to better suit your needs. Our publications will be refined and
enhanced as new volumes and updates are introduced.
If you have any questions or comments regarding this publication, please contact the Marketing Communications Department via
E-mail at
docerrors@microchip.com.
We welcome your feedback.
Most Current Data Sheet
To obtain the most up-to-date version of this data sheet, please register at our Worldwide Web site at:
http://www.microchip.com
You can determine the version of a data sheet by examining its literature number found on the bottom outside corner of any page.
The last character of the literature number is the version number, (e.g., DS30000000A is version A of document DS30000000).
Errata
An errata sheet, describing minor operational differences from the data sheet and recommended workarounds, may exist for current
devices. As device/documentation issues become known to us, we will publish an errata sheet. The errata will specify the revision
of silicon and revision of document to which it applies.
To determine if an errata sheet exists for a particular device, please check with one of the following:
• Microchip’s Worldwide Web site;
http://www.microchip.com
• Your local Microchip sales office (see last page)
When contacting a sales office, please specify which device, revision of silicon and data sheet (include literature number) you are
using.
Customer Notification System
Register on our web site at
www.microchip.com
to receive the most current information on all of our products.
DS40001664B-page 2
Preliminary
2012-2013 Microchip Technology Inc.
MTCH101
1.0
DEVICE OVERVIEW
The MTCH101 provides an easy way to add proximity
or touch detection to any human interface application.
The device integrates a single-channel capacitive
proximity detection, which can work through plastic,
glass or wood-front panel. It also supports a wide range
of conductive materials as sensor, like copper pad on
PCB, silver or carbon printing on plastic, Indium Tin
Oxide (ITO) pad, wire/cable, etc. On-board adjustable
sensitivity and power mode selection allow the user to
configure the device at run time easily. An active-low
output will communicate the state of the sensor to a
host/master MCU, or drive an indication LED (see
Figure 1-1).
FIGURE 1-1:
BLOCK DIAGRAM
Proximity
Scan Driver
Power Mode
Control
Proximity Sensor
ADC
Data Filtering
Proximity
Decoding
State Output
Host/
Discrete
Components
MTCH101
Sensitivity Adjust
2012-2013 Microchip Technology Inc.
Preliminary
DS40001664B-page 3
MTCH101
2.0
TYPICAL CIRCUIT
The MTCH101 can work either as a stand-alone device
to control a LED (see
Figure 2-1)
to indicate touch/
proximity, or work with host MCU (see
Figure 2-2).
FIGURE 2-1:
TYPICAL CIRCUIT AS STAND-ALONE
Proximity Sensor
V
DD
MTCH101
R3 1
4.7k
V
DD
R1
R4 3
R2
10k
MTSA
MTO
4
2
V
SS
V
DD
5
C1
0.1 µF
R6
MTI
MTPM
6
V
DD
V
DD
R5
10k
1k
FIGURE 2-2:
Proximity Sensor
TYPICAL CIRCUIT WITH HOST MCU
Host
MTCH101
R1 1
4.7k
2
V
SS
R2 3
10k
DAC output
V
DD
5
C1
0.1 µF
4
R4
MTI
MTPM
6
R3
Digital output
10k
V
DD
V
DD
4.7k
Digital input
MTSA
MTO
DS40001664B-page 4
Preliminary
2012-2013 Microchip Technology Inc.
MTCH101
3.0
SENSITIVITY ADJUSTMENT
FIGURE 3-3:
The sensitivity of the system determines how far and
fast it can respond to proximity or touch. The MTCH101
provides the MTSA pin to adjust the sensitivity, and the
voltage on this pin will determine the sensitivity. V
DD
voltage will give the lowest sensitivity, while GND
voltage will give the highest sensitivity.
The device will sample the voltage on the MTSA pin
after each scan, so it does not only support setting a
fixed sensitivity by a resistor ladder, but it also allows
adjusting the sensitivity dynamically, while the device is
running. A Digital-to-Analog Converter (DAC)
controlled by the host, or a hardware potentiometer can
be used to adjust the sensitivity. See typical circuit in
ABI Research最近评选并公布了全球超高频无源和高频无源 RFID芯片的前十大制造商。 前十大超高频无源芯片制造商是： 前十大高频无源芯片制造商是： 超高频的得奖名单并不出人意外，因为实际上似乎总是前三家公司获得大订单。ABI分析家 Mike Liard称，ABI很容易就评选出 Alien、Avery,和 Raflatac为全球...[详细]
ADI 近日宣布日立公司在其最新的消费类无线传输集线器 TP-WL700H 中使用 ADI 公司的 Advantiv ™高级电视解决方案 IC ，以提供高端的无线功能、灵活性和无缝高清 (HD) 连接。这款 TP-WL700H 集线器仅在日本市场供应，它是一款单机设备，专门用于为日立 Wooo UT 系列液晶电视提供无线高清娱乐内容。在日立公司最新的无线视...[详细]
Microchip MCU
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
