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参数资料
| 型号： | TSC2003I |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | ADC |
| 英文描述： | 3-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO16 |
| 封装： | PLASTIC, TSSOP-16 |
| 文件页数： | 20/20页 |
| 文件大小： | 309K |
| 代理商： | TSC2003I |
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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相关代理商/技术参数 |
参数描述 |
|---|---|
| TSC2003IPW | 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 |
| TSC2003IPWG4 | 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 |
| TSC2003IPWR | 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 |
| TSC2003IPWR | 制造商:Texas Instruments 功能描述:Controller IC |
| TSC2003IPWRG4 | 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 |
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