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參數(shù)資料
| 型號： | MXB7843 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | 2.375V to 5.25V, 4-Wire Touch-Screen |
| 中文描述： | 2.375V至5.25V、4線觸摸屏控制器 |
| 文件頁數(shù)： | 18/21頁 |
| 文件大?。?/td> | 508K |
| 代理商： | MXB7843 |
M
ground. Connect the digital system ground to the star
ground at this point only. For lowest noise operation,
minimize the length of the ground return to the star
ground
’
s power supply.
Power-supply decoupling is also crucial for optimal
device performance. Analog supplies can be decou-
pled by placing a 10μF tantalum capacitor in parallel
with a 0.1μF capacitor bypassed to GND. To maximize
performance, place these capacitors as close as possi-
ble to the supply pin of the device. Minimize capacitor
lead length for best supply-noise rejection. If the supply
is very noisy, a 10
resistor can be connected in series
as a lowpass filter.
While using the MXB7843, the interconnection between
the converter and the touch screen should be as short
as possible. Since touch screens have low resistance,
longer or loose connections may introduce error. Noise
can also be a major source of error in touch-screen
applications (e.g., applications that require a backlight
LCD panel). EMI noise coupled through the LCD panel
to the touch screen may cause flickering of the convert-
ed data. Utilizing a touch screen with a bottom-side
metal layer connected to ground decouples the noise
to ground. In addition, the filter capacitors from Y+, Y-,
X+, and X- inputs to ground also help further reduce
the noise. Caution should be observed for settling time
of the touch screen, especially operating in the single-
ended measurement mode and at high data rates.
Definitions
Integral Nonlinearity
Integral nonlinearity (INL) is the deviation of the values
on an actual transfer function from a straight line. This
straight line can be either a best-straight-line fit or a line
drawn between the endpoints of the transfer function,
once offset and gain errors have been nullified. The
static linearity parameters for the MXB7843 are mea-
sured using the end-point method.
Differential Nonlinearity
Differential nonlinearity (DNL) is the difference between
an actual step width and the ideal value of 1LSB. A
DNL error specification of less than 1LSB guarantees
no missing codes and a monotonic transfer function.
Aperture Jitter
Aperture jitter (t
AJ
) is the sample-to-sample variation in
the time between the samples.
Aperture Delay
Aperture delay (t
AD
) is the time defined between the
falling edge of the sampling clock and the instant when
an actual sample is taken.
Chip Information
TRANSISTOR COUNT: 12,000
PROCESS: 0.6μm BiCMOS
2.375V to 5.25V, 4-Wire Touch-Screen
Controller
18
______________________________________________________________________________________
MICROWIRE
I/O
SCK
MISO
MOSI
MASKABLE
INTERRUPT
CS
DCLK
DOUT
DIN
BUSY
MXB7843
Figure 11. MICROWIRE Interface
QSPI/SPI
I/O
SCK
MISO
MOSI
MASKABLE
INTERRUPT
CS
DCLK
DOUT
DIN
BUSY
MXB7843
Figure 12. QSPI/SPI Interface
TMS320LC3x
XF
CLKX
CLKR
DR
FSR
DX
CS
SCLK
DIN
DOUT
BUSY
MXB7843
Figure 13. TMS320 Serial Interface
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MXB7843EEE | 2.375V to 5.25V, 4-Wire Touch-Screen |
| MXB7843EUE | 2.375V to 5.25V, 4-Wire Touch-Screen |
| MXD1000SE__ | 5-Tap Silicon Delay Line |
| MXD1000PA__ | 5-Tap Silicon Delay Line |
| MXD1000PD__ | 5-Tap Silicon Delay Line |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MXB7843_05 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:2.375V to 5.25V, 4-Wire Touch-Screen Controller |
| MXB7843EEE | 功能描述:觸摸屏轉(zhuǎn)換器和控制器 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 |
| MXB7843EEE+ | 功能描述:觸摸屏轉(zhuǎn)換器和控制器 2.375-5.25V 4-Wire Touch-Screen Ctlr 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 |
| MXB7843EEE+T | 功能描述:觸摸屏轉(zhuǎn)換器和控制器 2.375-5.25V 4-Wire Touch-Screen Ctlr 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 |
| MXB7843EEE-T | 功能描述:觸摸屏轉(zhuǎn)換器和控制器 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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