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参数资料
| 型号： | TSC2003IPWT |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | ADC |
| 英文描述： | 2-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO16 |
| 封装： | PLASTIC, TSSOP-16 |
| 文件页数： | 6/25页 |
| 文件大小： | 535K |
| 代理商： | TSC2003IPWT |
TSC2003
14
SBAS162G
www.ti.com
BATTERY MEASUREMENT
An added feature of the TSC2003 is the ability to monitor the
battery voltage on the other side of the voltage regulator
(DC/DC converter), as shown in Figure 7. The battery voltage
can vary from 0.5V to 6V, while the voltage regulator main-
tains the voltage to the TSC2003 at 2.7V, 3.3V, etc. The input
voltage (VBAT1 or VBAT2) is divided down by 4 so that a 6.0V
battery voltage is represented as 1.5V to the A/D converter.
The simplifies the multiplexer and control logic. In order to
minimize the power consumption, the divider is only ON
during the sample period which occurs after control bits C3
= 0, C2 = 0, C1 = 0, and C0 = 1 (VBAT1) or C3 = 0, C2 = 1,
C1 = 0, and C0 = 1 (VBAT2) are received. See Tables I and
II for the relationship between the control bits and configura-
tion of the TSC2003.
VDD
VBAT
7.5k
2.5k
DC/DC
Converter
Battery
0.5V
to
6.0V
0.125V to 1.5V
2.7V
+
A/D
Converter
FIGURE 7. Battery Measurement Functional Block Diagram.
X-Position
Measure X-Position
Measure Z
1-Position
Touch
X+
Y+
X–
Y–
Z
1-Position
Touch
X+
Y+
Y–
X–
Measure Z
2-Position
Z
2-Position
Touch
X+
Y+
Y–
X–
FIGURE 8. Pressure Measurement Block Diagrams.
PRESSURE MEASUREMENT
Measuring touch pressure can also be done with the TSC2003.
To determine pen or finger touch, the pressure of the “touch”
needs to be determined. Generally, it is not necessary to
have high accuracy for this test, therefore, the 8-bit resolution
mode is recommended. However, calculations will be shown
with the 12-bit resolution mode. There are several different
ways of performing this measurement—the TSC2003 sup-
ports two methods.
The first method requires knowing the X-Plate resistance,
measurement of the X-Position, and two additional
cross-panel measurements (Z2 and Z1) of the touch screen,
as shown in Figure 8. Using Equation 2 will calculate the
touch resistance:
RR
X Position
4096
Z
– 1
TOUCH
X Plate
2
1
=
(2)
The second method requires knowing both the X-Plate and
Y-Plate resistance, measurement of X-Position and Y-Posi-
tion, and Z1. Equation 3 calculates the touch resistance using
the second method:
R
X
Position
4096
Z
– 1
–R
Y
Position
4096
TOUCH
X Plate
1
Y Plate
=
1–
(3)
DIGITAL INTERFACE
The TSC2003 supports the I2C serial bus and data transmis-
sion protocol in all three defined modes: standard, fast, and
high-speed. A device that sends data onto the bus is defined
as a transmitter, and a device receiving data as a receiver.
The device that controls the message is called a
master. The
devices that are controlled by the master are
slaves. The bus
must be controlled by a master device which generates the
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TSC2003IR | 功能描述:IC TOUCH SCREEN CNTRLLR 16-TSSOP RoHS:否 类别:集成电路 (IC) >> 数据采集 - 触摸屏控制器 系列:- 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) |
| TSC2003IZQCR | 功能描述:触摸屏转换器和控制器 4-wire Touch Screen Controller RoHS:否 制造商:Microchip Technology 类型:Resistive Touch Controllers 输入类型:3 Key 数据速率:140 SPS 分辨率:10 bit 接口类型:4-Wire, 5-Wire, 8-Wire, I2C, SPI 电源电压:2.5 V to 5.25 V 电源电流:17 mA 工作温度:- 40 C to + 85 C 封装 / 箱体:SSOP-20 |
| TSC2003-Q1 | 制造商:TI 制造商全称:Texas Instruments 功能描述:I2C TOUCH SCREEN CONTROLLER |
| TSC2004 | 制造商:BB 制造商全称:BB 功能描述:1.2V to 3.6V, 12-Bit, Nanopower, 4-Wire TOUCH SCREEN CONTROLLER with I2C⑩ Interface |
| TSC2004_12 | 制造商:BB 制造商全称:BB 功能描述:1.2V to 3.6V, 12-Bit, Nanopower, 4-Wire |
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