- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄361325 > QT320 (Electronic Theatre Controls, Inc.) 2 CHANNEL PROGAMMABLE ADVANCED SENSOR IC PDF資料下載
參數(shù)資料
| 型號(hào)： | QT320 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 2 CHANNEL PROGAMMABLE ADVANCED SENSOR IC |
| 中文描述： | 2頻道PROGAMMABLE先進(jìn)傳感器IC |
| 文件頁(yè)數(shù)： | 2/18頁(yè) |
| 文件大小： | 960K |
| 代理商： | QT320 |
第1頁(yè)當(dāng)前第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)第17頁(yè)第18頁(yè)
Serial clone data in
SDI
7
Serial clone data out
SDO
6
Serial clone data clock
SCK
3
Alternate Pin Functions for Cloning
Positive supply
VDD
8
Detection output, Ch. 2
OUT2
7
Sense Ch 2 pin A
S2A
6
Sense Ch 1 pin B
S1B
5
Negative supply (ground)
VSS
4
Sense Ch 1 pin A
S1A
3
Sense Ch 2 pin B
S2B
2
Detection output, Ch. 1
OUT1
1
Function
Name
Pin
Table 1-1 Pin Descriptions
1 - OVERVIEW
The QT320 is a 2 channel digital burst mode charge-transfer
(QT) sensor designed specifically for touch controls; it
includes all hardware and signal processing functions
necessary to provide stable sensing under a wide variety of
changing conditions. Only two low-cost, non-critical capacitors
are required for operation.
A unique aspect of the QT320 is the ability of the designer to
‘
clone
’
a wide range of user-defined setups into the part
’
s
eeprom during development and in production. Cloned setups
can dramatically alter the behavior of each channel,
independently. For production, the parts can be cloned
in-circuit or can be procured from Quantum pre-cloned.
Figure 1-1 shows the basic QT320 circuit using the device,
with a conventional output drive and power supply
connections.
1.1 BASIC OPERATION
The QT320 employs bursts of variable-length charge-transfer
cycles to acquire its signal. Burst mode permits power
consumption in the microamp range, dramatically reduces RF
emissions, lowers susceptibility to EMI, and yet permits
excellent response time. Internally the signals are digitally
processed to reject impulse noise using a 'consensus' filter
which requires several consecutive confirmations of a
detection before an output is activated.
The two channels of sensing operate in a completely
independent fashion. A unique cloning process allows the
internal eeprom of the device to be programmed for each
channel, to permit unique combinations of sensing and
processing functions for each.
The two sensing channels operate in interleaved
time-sequence and thus cannot interfere with each other.
1.2 ELECTRODE DRIVE
1.2.1 S
WITCHING
O
PERATION
The IC implements two channels of direct-to-digital
capacitance acquisition using the charge-transfer method, in
a process that is better understood as a capacitance-
to-digital converter (CDC). The QT switches and charge
measurement functions are all internal to the IC (Figure 1-2).
The CDC treats sampling capacitor Cs as a floating store of
accumulated charge which is switched between the sense
pins; as a result, the sense electrode can be connected to
either pin with no performance difference. In both cases the
rule Cs >> Cx must be observed for proper operation. The
polarity of the charge build-up across Cs during a burst is the
same in either case. Typical values of Cs range from 2nF to
100nF for touch operation.
Larger values of Cx cause charge to be transferred into Cs
more rapidly, reducing available resolution and resulting in
lower gain. Conversely, larger values of Cs reduce the rise of
differential voltage across it, increasing available resolution
and raising gain. The value of Cs can thus be increased to
allow larger values of Cx to be tolerated (Figures 5-1 to 5-4).
As Cx increases, the length of the burst decreases resulting in
lower signal numbers.
It is possible to connect separate Cx and Cx
’
loads to Sa and
Sb simultaneously, although the result is no different than if
the loads were connected together at Sa (or Sb). It is
important to limit the amount of stray Cx capacitance on both
terminals, especially if the load Cx is already large. This can
be accomplished by minimising trace lengths and widths.
l
Q
2
QT320/R1.03 08/02
Figure 1-2 Internal Switching
Figure 1-1 Basic QT320 circuit
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| QT320-D | 2 CHANNEL PROGAMMABLE ADVANCED SENSOR IC |
| QT320-IS | 2 CHANNEL PROGAMMABLE ADVANCED SENSOR IC |
| QT60040-S | IC-SMD-QPROX MATRIX SENSOR |
| QT60040 | 4-KEY CHARGE-TRANSFER IC |
| QT60040-D | 4-KEY CHARGE-TRANSFER IC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| QT320-D | 功能描述:SENSOR IC TOUCH PROG 2CH 8-DIP RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 觸摸屏控制器 系列:QProx™ 標(biāo)準(zhǔn)包裝:96 系列:- 類型:- 觸摸面板接口:- 輸入數(shù)/鍵:- 分辨率（位）:- 評(píng)估套件:* 數(shù)據(jù)接口:- 數(shù)據(jù)速率/采樣率 (SPS，BPS):- 電壓基準(zhǔn):- 電源電壓:- 電流 - 電源:- 工作溫度:- 安裝類型:表面貼裝 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:16-TSSOP 包裝:帶卷 (TR) |
| QT320-IS | 功能描述:SENSOR IC TOUCH PROG 2CH 8-SOIC RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 觸摸屏控制器 系列:QProx™ 標(biāo)準(zhǔn)包裝:96 系列:- 類型:- 觸摸面板接口:- 輸入數(shù)/鍵:- 分辨率（位）:- 評(píng)估套件:* 數(shù)據(jù)接口:- 數(shù)據(jù)速率/采樣率 (SPS，BPS):- 電壓基準(zhǔn):- 電源電壓:- 電流 - 電源:- 工作溫度:- 安裝類型:表面貼裝 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:16-TSSOP 包裝:帶卷 (TR) |
| QT320-ISG | 功能描述:SENSOR IC TOUCH PROG 2CH 8-SOIC RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 觸摸屏控制器 系列:QProx™ 標(biāo)準(zhǔn)包裝:96 系列:- 類型:- 觸摸面板接口:- 輸入數(shù)/鍵:- 分辨率（位）:- 評(píng)估套件:* 數(shù)據(jù)接口:- 數(shù)據(jù)速率/采樣率 (SPS，BPS):- 電壓基準(zhǔn):- 電源電壓:- 電流 - 電源:- 工作溫度:- 安裝類型:表面貼裝 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:16-TSSOP 包裝:帶卷 (TR) |
| QT320-S | 功能描述:SENSOR IC TOUCH PROG 2CH 8-SOIC 制造商:microchip technology 系列:QProx?? 包裝:管件 零件狀態(tài):停產(chǎn) 觸摸屏:2 線電容 分辨率（位）:16 b 接口:串行 電壓基準(zhǔn):內(nèi)部 電壓 - 電源:1.8 V ~ 5.25 V 電流 - 電源:600μA 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 供應(yīng)商器件封裝:8-SO 基本零件編號(hào):QT320 標(biāo)準(zhǔn)包裝:95 |
| QT-35B | 功能描述:印刷電路板和試驗(yàn)板 TEST SOCKET 60 TIE POINTS, BREADBOARD RoHS:否 制造商:3M Electronic Solutions Division 產(chǎn)品:Jumper & Insulated Wires 描述/功能:Jumper wire, 22 AWG 0.1 inch 長(zhǎng)度:0.1 in 寬度: |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。