參數(shù)資料
型號(hào)： MXB7846EUE
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： ADC
英文描述： 2.375V to 5.25V, 4-Wire Touch-Screen Controller with Internal Reference and Temperature Sensor
中文描述： 2-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO16
封裝： 4.40 MM, 0.65 MM PITCH, MO-153AC, TSSOP-16
文件頁(yè)數(shù)： 13/23頁(yè)
文件大小： 967K
代理商： MXB7846EUE
M
2.375V to 5.25V, 4-Wire Touch-Screen Controller
with Internal Reference and Temperature Sensor
______________________________________________________________________________________
13
The first method performs pressure measurements
using a known X-plate resistance. After completing
three conversions (X-position, Z1, and Z2), use the fol-
lowing equation to calculate R
TOUCH
:
The second method requires knowing both the X-plate
and Y-plate resistance. Three conversions are required in
this method: the X-position, Y-position, and Z1-position.
Use the following equation to calculate R
TOUCH:
Internal Temperature Sensor
The MXB7846 provides two temperature measurement
options: single-ended conversion and differential con-
version. Both temperature measurement techniques rely
on the semiconductor junction’s temperature character-
istics. The forward diode voltage (V
BE
) vs. temperature
is a well-defined characteristic. The ambient tempera-
ture can be calculated by knowing the value of V
BE
at a
fixed temperature and then monitoring the change in
that voltage as the temperature changes. The single
conversion method requires calibration at a known tem-
perature, but only needs a single reading to calculate
the ambient temperature. First, the
PENIRQ
diode for-
R
R
Z
X
Z
R
Y
TOUCH
XPLATE
1
POSITION
4096
YPLATE
POSITION
4096
=
×
×
×
1
4096
1
R
R
X
Z
Z
TOUCH
XPLATE
POSITION
4096
=
(
)
×
×
1
2
1
R
TOUCH
OPEN CIRCUIT
F
SENSE LINE
MEASURE Z2
MEASURE Z1
X+
X-
Y+
+
-
Y-
R
TOUCH
OPEN CIRCUIT
F
S
X+
X-
Y+
Y-
MEASURE X- POSITION
X- POSITION
R
TOUCH
OPEN CIRCUIT
F
S
X+
X-
Y+
Y-
V
+
-
V
+
-
V
Figure 7. Pressure Measurement Block Diagram
NO RESPONSE TO TOUCH
MASK PENIRQ
PENIRQ ENABLED
t
TOUCH
SCREEN TOUCHED HERE
INTERRUPT PROCESSOR
S
A2
A1
A0
M
S/D
PD1
PD0
1
2
3
4
5
6
7
8
1
2
3
12
13
14
15
16
PENIRQ
CS
DIN
DCLK
Figure 6.
PENIRQ
Timing Diagram
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MXB7846EUE+ 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
MXB7846EUE+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
MXB7846EUE-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
MXB7846EVC16 功能描述:數(shù)據(jù)轉(zhuǎn)換 IC 開(kāi)發(fā)工具 MXB7846C16 Eval Kit RoHS:否 制造商:Texas Instruments 產(chǎn)品:Demonstration Kits 類型:ADC 工具用于評(píng)估:ADS130E08 接口類型:SPI 工作電源電壓:- 6 V to + 6 V
MXB7846EVKIT 功能描述:開(kāi)發(fā)板和工具包 - 其他處理器 Programmers, Development Systems RoHS:否 制造商:Freescale Semiconductor 產(chǎn)品:Development Systems 工具用于評(píng)估:P3041 核心:e500mc 接口類型:I2C, SPI, USB 工作電源電壓:
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