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參數資料
| 型號： | 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 |
| 文件頁數： | 20/20頁 |
| 文件大小： | 309K |
| 代理商： | TSC2003IR |
TSC2003
9
SBAS162A
www.ti.com
THEORY OF OPERATION
The TSC2003 is a classic Successive Approximation
Register (SAR) Analog-to-Digital (A/D) converter. The ar-
chitecture is based on capacitive redistribution which inher-
ently includes a sample-and-hold function. The converter is
fabricated on a 0.6
CMOS process.
The basic operation of the TSC2003 is shown in Figure 1.
The device features an internal 2.5V reference and an
internal clock. Operation is maintained from a single supply
of 2.7V to 5.25V. The internal reference can be overdriven
with an external, low-impedance source between 2V and
+VDD. The value of the reference voltage directly sets the
input range of the converter.
The analog input (X, Y, and Z parallel coordinates, auxiliary
inputs, battery voltage, and chip temperature) to the con-
verter is provided via a multiplexer. A unique configuration
of low on-resistance switches allows an unselected A/D
converter input channel to provide power, and an accompa-
FIGURE 1. Basic Operation of the TSC2003.
nying pin to provide ground for an external device. By
maintaining a differential input to the converter, and a
differential reference architecture, it is possible to negate the
switch’s on-resistance error (should this be a source of error
for the particular measurement).
ANALOG INPUT
See Figure 2 for a block diagram of the input multiplexer on
the TSC2003, the differential input of the A/D converter,
and the converter's differential reference.
When the converter enters the Hold mode, the voltage
difference between the +IN and –IN inputs (see Figure 2) is
captured on the internal capacitor array. The input current on
the analog inputs depends on the conversion rate of the
device. During the sample period, the source must charge
the internal sampling capacitor (typically 25pF). After the
capacitor has been fully charged, there is no further input
current. The amount of charge transfer from the analog
source to the converter is a function of conversion rate.
1
2
3
4
5
6
7
8
+V
DD
X+
Y+
X–
Y–
GND
V
BAT1
V
BAT2
IN1
IN2
A0
A1
SCL
SDA
PENIRQ
V
REF
16
15
14
13
12
11
10
9
TSC2003
Serial Clock
Serial Data
Pen Interrupt
+
1
F
to
10
F
(Optional)
+2.7V to +5V
Touch
Screen
0.1
F
1
F
to
10
F
(Optional)
0.1
F
+
Main
Battery
Secondary
Battery
1.2k
50k
1.2k
Auxiliary Input
Voltage
Regulator
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相關代理商/技術參數 |
參數描述 |
|---|---|
| TSC2003IZQCR | 功能描述:觸摸屏轉換器和控制器 4-wire Touch Screen Controller RoHS:否 制造商:Microchip Technology 類型:Resistive Touch Controllers 輸入類型:3 Key 數據速率: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:觸摸傳感器開發工具 TSC2004EVM Eval Mod RoHS:否 制造商:Cypress Semiconductor 工具用于評估: 接口類型: 工作電壓: 最大工作溫度: |
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