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参数资料
| 型号： | QT111-S |
| 英文描述： | IC-SMD-QPROX SENSOR |
| 中文描述： | 集成电路表面贴装，量研传感器 |
| 文件页数： | 7/9页 |
| 文件大小： | 78K |
| 代理商： | QT111-S |
QT115 QProx 8-pin Sensor
See QT110 datasheet for primary information.
Description
The QT115 is a variant of the QT110 having variable sensitivity and the ability to daisy-chain, allowing multiple
QT115's to be used in immediate proximity to each other to create a small touch panel of up to 10 keys. Like
the QT113, it has a variable threshold which can be modified by simply altering the value of the sample
capacitor Cs, which acts to modify gain. It does not include any of the option jumpers found on the QT110 or
QT113; instead it has a single option jumper for 'Master' or 'Slave' mode operation.
The QT115 includes 'Sync Out' and 'Sync In' pins for daisy-chaining. The first IC in the chain is the Master while
the remaining devices in the chain are slaves. Daisy-chaining lets each device take its turn in generating a
burst, free from interference by the other QT devices. In Master mode the IC operates autonomously, and
generates a 20us negative Sync Out pulse on pin 3 after each burst. In Slave mode the IC issues a detection
burst only after it receives a negative Sync pulse on pin 4 from a prior device in the chain, which could be
another Slave or a Master. Slave devices in turn issue a 20us Sync pulse after each burst on pin 3.
The QT115 is designed for contact and prox sensing applications where high sensitivity is paramount, for
example when sensing through thick panels or windows or for security monitoring. The QT115 trades off power
consumption for speed and sensing range. Also, note that the device has a consensus filter count of 3 instead
of 4, and does not have the drive capability for a piezo 'beeper'.
If desired, the Master device can be eliminated and the chain of Slave devices can be mastered from an
external pulse source of 20us negative pulses at the desired repetition rate. This potentially allows for faster
operation.
Differences with the QT110
The QT115 IC is exactly the same in all respects to the QT110 with the following exceptions (refer to Tables
5.2, 5.3, 5.4, and 5.5 in the QT110 datasheet).
5.2 RECOMMENDED OPERATING CONDITIONS
Cx Load Capacitance
................................................................. 0 to 100pF
Cs .............................................................................. 10nF to 500nF
5.3 AC SPECIFICATIONS VDD = 3.0, TA = RECOMMENDED OPERATING RANGE
Note 1
ms
300
8
Response time
TR
Cs = 10nf to 500nf, Cx = 0
ms
75
0.5
Burst length
TBL
Cs = 10nf, Cx = 0
ms
2
Burst spacing interval, slave
TBS2
Cs = 10nf to 500nf, Cx = 0
ms
40
30
Burst spacing interval, master
TBS1
Notes
Units
Max
Typ
Min
Description
Parameter
Note 1: Lengthens with increasing Cs but decreases with increasing Cx; see Chart 3.
5.4 SIGNAL PROCESSING
secs
10
Post-detection recalibration timer duration
ms/level
40
Negative drift compensation rate
ms/level
1,800
Positive drift compensation rate
samples
3
Consensus filter length
w.r.t. threshold cts.
%
17
Hysteresis
Note 1
counts
6
Threshold differential, fixed
Notes
Units
Max
Typ
Min
Description
Note 1: All percentage thresholds have been eliminated and replaced with a fixed threshold w.r.t. the reference level
3 April 2000
相关PDF资料 |
PDF描述 |
|---|---|
| QT115-D | IC-QPROX SENSOR |
| QT115-S | IC-SMD-QPROX SENSOR |
| QT114-D | IC-QPROX SENSOR |
| QT114-S | IC-SMD-QPROX SENSOR |
| QT12C-SERIES | Peripheral IC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| QT112 | 制造商:QUANTUM 制造商全称:QUANTUM 功能描述:QT 11x Series Variations |
| QT112-D | 功能描述:SENSOR IC TOUCH/PROXMTY 1CH 8DIP RoHS:否 类别:集成电路 (IC) >> 数据采集 - 触摸屏控制器 系列:QProx™ 标准包装:96 系列:- 类型:- 触摸面板接口:- 输入数/键:- 分辨率（位）:- 评估套件:* 数据接口:- 数据速率/采样率 (SPS，BPS):- 电压基准:- 电源电压:- 电流 - 电源:- 工作温度:- 安装类型:表面贴装 封装/外壳:16-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:16-TSSOP 包装:带卷 (TR) |
| QT112H-I | 制造商:QUANTUM 制造商全称:QUANTUM 功能描述:QT 11x Series Variations |
| QT112-I | 制造商:QUANTUM 制造商全称:QUANTUM 功能描述:QT 11x Series Variations |
| QT112-IS | 功能描述:SENSOR IC TOUCH/PROXMTY 1CH8SOIC RoHS:否 类别:集成电路 (IC) >> 数据采集 - 触摸屏控制器 系列:QProx™ 标准包装:96 系列:- 类型:- 触摸面板接口:- 输入数/键:- 分辨率（位）:- 评估套件:* 数据接口:- 数据速率/采样率 (SPS，BPS):- 电压基准:- 电源电压:- 电流 - 电源:- 工作温度:- 安装类型:表面贴装 封装/外壳:16-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:16-TSSOP 包装:带卷 (TR) |
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