參數(shù)資料
型號(hào)： TSC2003IR
廠商： TEXAS INSTRUMENTS INC
元件分類： ADC
英文描述： 3-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO16
封裝： PLASTIC, TSSOP-16
文件頁(yè)數(shù)： 5/20頁(yè)
文件大?。?/td> 309K
代理商： TSC2003IR
TSC2003
13
SBAS162A
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 regu-
lator maintains 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 configuration 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 will calculate the touch resistance
using the second method:
R
X
Position
4096
Z
–1
–R
Y
Position
4096
TOUCH
X Plate
1
Y Plate
=
(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
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參數(shù)描述
TSC2003IZQCR 功能描述:觸摸屏轉(zhuǎn)換器和控制器 4-wire Touch Screen Controller RoHS:否 制造商:Microchip Technology 類型:Resistive Touch Controllers 輸入類型:3 Key 數(shù)據(jù)速率:140 SPS 分辨率:10 bit 接口類型:4-Wire, 5-Wire, 8-Wire, I2C, SPI 電源電壓:2.5 V to 5.25 V 電源電流:17 mA 工作溫度:- 40 C to + 85 C 封裝 / 箱體:SSOP-20
TSC2003-Q1 制造商:TI 制造商全稱:Texas Instruments 功能描述:I2C TOUCH SCREEN CONTROLLER
TSC2004 制造商:BB 制造商全稱: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 制造商全稱:BB 功能描述:1.2V to 3.6V, 12-Bit, Nanopower, 4-Wire
TSC2004EVM 功能描述:觸摸傳感器開發(fā)工具 TSC2004EVM Eval Mod RoHS:否 制造商:Cypress Semiconductor 工具用于評(píng)估: 接口類型: 工作電壓: 最大工作溫度:
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