參數(shù)資料
型號(hào)： TSC2046EIZQCR
元件分類： 圓形連接器
英文描述： Circular Connector; MIL SPEC:MIL-C-26482, Series I, Crimp; Body Material:Aluminum; Series:PT06; No. of Contacts:3; Connector Shell Size:8; Connecting Termination:Crimp; Circular Shell Style:Straight Plug; Body Style:Straight
中文描述： 低電壓I / O觸摸屏控制器
文件頁(yè)數(shù)： 16/23頁(yè)
文件大小： 554K
代理商： TSC2046EIZQCR
TSC2046
SBAS265C
16
www.ti.com
1k
1M
10k
100k
f
SAMPLE
(Hz)
S
μ
A
1000
100
10
1
f
CLK
= 16 f
SAMPLE
f
CLK
= 2MHz
Supply Current from
+V
CC
and IOVDD
T
A
= 25
°
C
+V
CC
= 2.7V
IOVDD = 1.8V
FIGURE 15. Supply Current versus Directly Scaling the Fre-
quency of DCLK with Sample Rate or Maintain-
ing DCLK at the Maximum Possible Frequency.
FIGURE 14. Ideal Input Voltages and Output Codes.
O
0V
FS = Full-Scale Voltage = V
REF(1)
1LSB = V
REF(1)
/4096
FS – 1LSB
11...111
11...110
11...101
00...010
00...001
00...000
1LSB
NOTES: (1) Reference voltage at converter: +REF – (–REF), see Figure 2.
(2) Input voltage at converter, after multiplexer: +IN – (–IN), see Figure 2
Input Voltage
(2)
(V)
Digital Timing
Figures 9 and 12 and Table VI provide detailed timing for the
digital interface of the TSC2046.
15 Clocks-per-Conversion
Figure 13 provides the fastest way to clock the TSC2046.
This method does not work with the serial interface of most
microcontrollers and digital signal processors, as they are
generally not capable of providing 15 clock cycles per serial
transfer. However, this method can be used with field pro-
grammable gate arrays (FPGAs) or application specific inte-
grated circuits (ASICs). Note that this effectively increases
the maximum conversion rate of the converter beyond the
values given in the specification tables, which assume 16
clock cycles per conversion.
Data Format
The TSC2046 output data is in Straight Binary format, as
shown in Figure 14. This figure shows the ideal output code
for the given input voltage and does not include the effects
of offset, gain, or noise.
8-Bit Conversion
The TSC2046 provides an 8-bit conversion mode that can be
used when faster throughput is needed and the digital result
is not as critical. By switching to the 8-bit mode, a conversion
is complete four clock cycles earlier. Not only does this shorten
each conversion by four bits (25% faster throughput), but each
conversion can actually occur at a faster clock rate. This is
because the internal settling time of the TSC2046 is not as
critical—settling to better than 8 bits is all that is needed. The
clock rate can be as much as 50% faster. The faster clock rate
and fewer clock cycles combine to provide a 2x increase in
conversion rate.
POWER DISSIPATION
There are two major power modes for the TSC2046: full-power
(PD0 = 1) and auto power-down (PD0 = 0). When operating at
full speed and 16 clocks-per-conversion (see Figure 11), the
TSC2046 spends most of the time acquiring or converting.
There is little time for auto power-down, assuming that this
mode is active. Therefore, the difference between full-power
mode and auto power-down is negligible. If the conversion rate
is decreased by slowing the frequency of the DCLK input, the
two modes remain approximately equal. However, if the DCLK
frequency is kept at the maximum rate during a conversion but
conversions are done less often, the difference between the
two modes is dramatic.
Figure 15 shows the difference between reducing the DCLK
frequency (scaling DCLK to match the conversion rate) or
maintaining DCLK at the highest frequency and reducing the
number of conversions per second. In the latter case, the
converter spends an increasing percentage of time in power-
down mode (assuming the auto power-down mode is active).
Another important consideration for power dissipation is the
reference mode of the converter. In the single-ended refer-
ence mode, the touch panel drivers are ON only when the
analog input voltage is being acquired (see Figure 9 and
Table I). The external device (e.g., a resistive touch screen),
therefore, is only powered during the acquisition period. In
the differential reference mode, the external device must be
powered throughout the acquisition and conversion periods
(see Figure 9). If the conversion rate is high, this could
substantially increase power dissipation.
相關(guān)PDF資料
PDF描述
TSC2046IZQCR Circular Connector; MIL SPEC:MIL-C-26482, Series I, Crimp; Body Material:Aluminum; Series:PT06; Number of Contacts:3; Connector Shell Size:8; Connecting Termination:Crimp; Circular Shell Style:Straight Plug; Body Style:Straight
TSC2046IZQCR-90 Circular Connector; No. of Contacts:3; Series:; Body Material:Aluminum; Connector Shell Size:8; Circular Contact Gender:Socket; Circular Shell Style:Straight Plug; Insert Arrangement:8-3
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TSC2046EIZQCT 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
TSC2046E-Q1 制造商:TI 制造商全稱:Texas Instruments 功能描述:LOW-VOLTAGE I/O TOUCH SCREEN CONTROLLER
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TSC2046EVM 功能描述:觸摸傳感器開(kāi)發(fā)工具 TSC2046 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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