參數(shù)資料
型號(hào)： TSC2003IPWT
廠商： TEXAS INSTRUMENTS INC
元件分類： ADC
英文描述： 2-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO16
封裝： PLASTIC, TSSOP-16
文件頁(yè)數(shù)： 2/25頁(yè)
文件大小： 535K
代理商： TSC2003IPWT
TSC2003
10
SBAS162G
www.ti.com
THEORY OF OPERATION
The TSC2003 is a classic Successive Approximation
Register (SAR) Analog-to-Digital (A/D) converter. The archi-
tecture is based on capacitive redistribution which inherently
includes a sample-and-hold function. The converter is fabri-
cated 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 con-
verter input channel to provide power, and an accompanying
pin to provide ground for an external device. By maintaining
FIGURE 1. Basic Operation of the TSC2003.
a differential input to the converter, and a differential refer-
ence 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(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TSC2003IR 功能描述:IC TOUCH SCREEN CNTRLLR 16-TSSOP RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 觸摸屏控制器 系列:- 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)
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
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