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參數(shù)資料
| 型號： | 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 |
| 文件頁數(shù)： | 16/23頁 |
| 文件大?。?/td> | 967K |
| 代理商： | MXB7846EUE |
M
2.375V to 5.25V, 4-Wire Touch-Screen Controller
with Internal Reference and Temperature Sensor
16
______________________________________________________________________________________
The fastest the MXB7846 can run with
CS
held continu-
ously low is 15 clock conversions. Figure 10 shows the
serial-interface timing necessary to perform a conver-
sion every 15 DCLK cycles. If
CS
is connected low and
DCLK is continuous, guarantee a start bit by first clock-
ing in 16 zeros.
Most microcontrollers (μCs) require that data transfers
occur in multiples of eight DCLK cycles; 16 clocks per
conversion is typically the fastest that a μC can drive the
MXB7846. Figure 11 shows the serial interface timing nec-
essary to perform a conversion every 16 DCLK cycles.
8-Bit Conversion
The MXB7846 provides an 8-bit conversion mode
selected by setting the MODE bit in the control byte
high. In the 8-bit mode, conversions complete four
clock cycles earlier than in the 12-bit output mode,
resulting in 25% faster throughput. This can be used in
conjunction with serial interfaces that provide 12-bit
transfers, or two conversions could be accomplished
with three 8-bit transfers. Not only does this shorten each
conversion by 4 bits, but each conversion can also
occur at a faster clock rate since settling to better than 8
bits is all that is required. The clock rate can be as much
as 25% faster. The faster clock rate and fewer clock
cycles combine to increase the conversion rate.
SUPPLY CURRENT (typ) (μA)
DURING
CONVERSION
200
200
400
600
PD1
PD0
PENIRQ
STATUS
AFTER
CONVERSION
1
200
400
600
0
0
1
1
0
1
0
1
Enabled
Disabled
Disabled
Disabled
ADC is ON during conversion, OFF between conversion
ADC is always ON, reference is always OFF
ADC is always OFF, reference is always ON
ADC is always ON, reference is always ON
Table 4. Power-Mode Selection
DCLK
1
8
9
12
16
4
5
6
7
8
9
10
11
3
2
1
0
20
24
4
DOUT
A/D STATE
BUSY
CS
DIN
S
A2
A1
A0
MODE
ON
OFF
(MSB)
(LSB)
CONVERSION
ACQUIRE
IDLE
IDLE
IDLE
t
ACQ
T
B
ACQUIRE
CONVERSION
IDLE
RB1
OFF
OFF
OFF
ON
PD1
PD0
(START)
SER/
DFR
DRIVERS 1 AND 2
(SER/DFR HIGH)
DRIVERS 1 AND 2
(SER/DFR LOW)
R
B2
R
B3
Figure 9. Conversion Timing, 24-Clock per Conversion, 8-Bit Bus Interface
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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 工具用于評估:ADS130E08 接口類型:SPI 工作電源電壓:- 6 V to + 6 V |
| MXB7846EVKIT | 功能描述:開發(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 工具用于評估:P3041 核心:e500mc 接口類型:I2C, SPI, USB 工作電源電壓: |
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