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參數(shù)資料
| 型號： | TSC2100IDA |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PDSO32 |
| 封裝： | GREEN, PLASTIC, TSSOP-32 |
| 文件頁數(shù)： | 11/77頁 |
| 文件大?。?/td> | 1079K |
| 代理商： | TSC2100IDA |
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TSC2100
SLAS378 NOVEMBER 2003
www.ti.com
19
Data Format
The TSC2100 output data is in unsigned binary format and can be read from the registers over the SPI interface.
Reference
The TSC2100 has an internal voltage reference that can be set to 1.25 V or 2.5 V,through the reference control register.
The internal reference voltage should only be used in the single-ended mode for battery monitoring, temperature
measurement, and for measuring the auxiliary inputs. Optimal touch screen performance is achieved when using a
ratiometric conversion, thus all touch screen measurements are done automatically in the ratiometric mode.
An external reference can also be applied to the VREF pin, and the internal reference can be turned off.
Variable Resolution
The TSC2100 provides three different resolutions for the A/D converter: 8-, 10- or 12-bits. Lower resolutions are often
practical for measurements such as touch pressure. Performing the conversions at lower resolution reduces the amount
of time it takes for the A/D converter to complete its conversion process, which lowers power consumption.
Conversion Clock and Conversion Time
The TSC2100 contains an internal 8-MHz clock, which is used to drive the state machines inside the device that perform
the many functions of the part. This clock is divided down to provide a clock to run the A/D converter. The division ratio for
this clock is set in the A/D converter control register. The ability to change the conversion clock rate allows the user to
choose the optimal value for resolution, speed, and power. If the 8-MHz clock is used directly, the A/D converter is limited
to 8-bit resolution; using higher resolutions at this speed may not result in accurate conversions. Using a 4-MHz conversion
clock is suitable for 10-bit resolution; 12-bit resolution requires that the conversion clock run at 1 or 2 MHz.
Regardless of the conversion clock speed, the internal clock runs nominally at 8 MHz. The conversion time of the TSC2100
is dependent upon several functions (see the section Touch Screen Conversion Initiated at Touch Detect in this data sheet).
While the conversion clock speed plays an important role in the time it takes for a conversion to complete, a certain number
of internal clock cycles is needed for proper sampling of the signal. Moreover, additional times, such as the panel voltage
stabilization time, can add significantly to the time it takes to perform a conversion. Conversion time can vary depending
upon the mode in which the TSC2100 is used. Throughout this data sheet, internal and conversion clock cycles are used
to describe the times that many functions take to execute. Considering the total system design, these times must be taken
into account by the user.
When both the audio ADC and DAC are powered down, the touch screen A/D uses an internal oscillator for conversions.
However, to save power whenever audio ADC or DAC are powered up, the internal oscillator is powered down and MCLK
and BCLK are used to clock the touch screen A/D.
The TSC2100 uses the programmed value of Page2, Reg 06H D13 and the PLL programmability to derive a clock from
MCLK. The various combinations are listed in Table 1.
Table 1. Conversion Clock Frequency
Page2, Reg 06H, D13 = 0
Page2, Reg 06H, D13 = 1
PLL enabled
MCLK
K
13
P
160
MCLK
K
17
P
192
PLL disabled
MCLK
13
Q
10
MCLK
17
Q
12
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TSC2100IRHBR | SPECIALTY CONSUMER CIRCUIT, PQCC32 |
| TSC2100IRHB | SPECIALTY CONSUMER CIRCUIT, PQCC32 |
| TSC2100IDAG4 | SPECIALTY CONSUMER CIRCUIT, PDSO32 |
| TSC2100IRHBG4 | SPECIALTY CONSUMER CIRCUIT, PQCC32 |
| TSC2100IRHBRG4 | SPECIALTY CONSUMER CIRCUIT, PQCC32 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TSC2100IDAG4 | 功能描述:觸摸屏轉(zhuǎn)換器和控制器 Prog 4-Wire w/Ster Codec & Hdph/Spk Amp 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 |
| TSC2100IDAR | 功能描述:觸摸屏轉(zhuǎn)換器和控制器 Prog 4-Wire w/Ster Codec & Hdph/Spk Amp 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 |
| TSC2100IDARG4 | 功能描述:觸摸屏轉(zhuǎn)換器和控制器 Prog 4-Wire w/Ster Codec & Hdph/Spk Amp 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 |
| TSC2100IRHB | 功能描述:觸摸屏轉(zhuǎn)換器和控制器 Prog 4-Wire w/Ster Codec & Hdph/Spk Amp 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 |
| TSC2100IRHBG4 | 功能描述:觸摸屏轉(zhuǎn)換器和控制器 Prog 4-Wire w/Ster Codec & Hdph/Spk Amp 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 |
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