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参数资料
| 型号： | MAX1233-MAX1234 |
| 厂商： | Maxim Integrated Products, Inc. |
| 英文描述： | 【15kV ESD-Protected Touch-Screen Controllers Include DAC and Keypad Controller |
| 中文描述： | 【15kV ESD保护触摸屏控制器包括DAC和键盘控制器 |
| 文件页数： | 41/44页 |
| 文件大小： | 706K |
| 代理商： | MAX1233-MAX1234 |
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M
±15kV ESD-Protected Touch-Screen
Controllers Include DAC and Keypad Controller
______________________________________________________________________________________
41
Equation 5 shows that the maximum output voltage occurs
for the minimum DAC voltage, and that the minimum
output voltage occurs for the maximum DAC voltage.
To ensure that the desired output swing is achieved,
choose appropriate values of R1, R2, and R3.
Calculate V
OUTMAX
using the following equation:
V
OUTMAX
= V
REFMAX
+ (R1
MAX
/ R2
MIN
)V
REFMAX
+ (R1
MAX
/ R3
MIN
) (V
REFMAX
- V
DACMIN
)
[Equation 6]
If V
OUTMAX
exceeds the maximum ratings of the
LCD/TFT display, the DAC codes that cause the output
voltage to go too high must be avoided.
Calculate V
OUTMIN
using the following equation:
V
OUTMIN
= V
REFMIN
+ (R1
MIN
/ R2
MAX
)V
REFMIN
+
(R1
MAX
/ R3
MIN
) (V
REFMIN
- V
DACMAX
)
[Equation 7]
If V
OUTMIN
is too low for desired operation, avoid the DAC
codes, which cause the output voltage to go too low.
Connection to Standard Interface
SPI and MICROWIRE Interfaces
When using an SPI interface (
Figure
28a) or
MICROWIRE (
Figure
28b), set the CPOL = CPHA = 0.
At least four 8-bit operations are necessary to read or
write data to/from the MAX1233/MAX1234. DOUT data
transitions on the serial clock
’
s falling edge and is
clocked into the μP on the DCLK
’
s rising edge. The first
MAX1233
MAX1234
R1
R3
i
1
i
2
i
3
R2
AV
DD
DAC
DACOUT
FEEDBACK
RESISTORS
V
1.25V
ERROR AMP
SIMPLIFIED DC/DC CONVERTER
V
BATT
V
OUT
(LCD BIAS)
CONTROL
MAX1677
Figure 27. LCD Contrast Control Circuit
MAX1233
MAX1234
CS
SCK
MISO
MOSI
CS
DCLK
DOUT
DIN
SPI
SS
V
DD
BUSY
PENIRQ
KEYIRQ
Figure 28a. SPI Interface
MAX1233
MAX1234
CS
SCK
MISO
MOSI
CS
DCLK
DOUT
DIN
MICROWIRE
BUSY
PENIRQ
KEYIRQ
Figure 28b. MICROWIRE Interface
相关PDF资料 |
PDF描述 |
|---|---|
| MAX1233 | 【15kV ESD-Protected Touch-Screen Controllers Include DAC and Keypad Controller |
| MAX1233EGI | 【15kV ESD-Protected Touch-Screen Controllers Include DAC and Keypad Controller |
| MAX1234EGI | 【15kV ESD-Protected Touch-Screen Controllers Include DAC and Keypad Controller |
| MAX1239 | 2.7V to 3.6V and 4.5V to 5.5V, Low-Power, 4-/12-Channel, 2-Wire Serial, 12-Bit ADCs |
| MAX1239LEEE | 2.7V to 3.6V and 4.5V to 5.5V, Low-Power, 4-/12-Channel, 2-Wire Serial, 12-Bit ADCs |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1234EGI | 功能描述:触摸屏转换器和控制器 RoHS:否 制造商:Microchip Technology 类型:Resistive Touch Controllers 输入类型:3 Key 数据速率:140 SPS 分辨率:10 bit 接口类型:4-Wire, 5-Wire, 8-Wire, I2C, SPI 电源电压:2.5 V to 5.25 V 电源电流:17 mA 工作温度:- 40 C to + 85 C 封装 / 箱体:SSOP-20 |
| MAX1234EGI+ | 制造商:Maxim Integrated Products 功能描述:TOUCH SCREEN CONTROLLER 28-PIN QFN EP - Rail/Tube |
| MAX1234EGI-T | 功能描述:触摸屏转换器和控制器 RoHS:否 制造商:Microchip Technology 类型:Resistive Touch Controllers 输入类型:3 Key 数据速率:140 SPS 分辨率:10 bit 接口类型:4-Wire, 5-Wire, 8-Wire, I2C, SPI 电源电压:2.5 V to 5.25 V 电源电流:17 mA 工作温度:- 40 C to + 85 C 封装 / 箱体:SSOP-20 |
| MAX1234ETI+ | 功能描述:触摸屏转换器和控制器 4Ch uWire QSPI/SPI Touch Interface RoHS:否 制造商:Microchip Technology 类型:Resistive Touch Controllers 输入类型:3 Key 数据速率:140 SPS 分辨率:10 bit 接口类型:4-Wire, 5-Wire, 8-Wire, I2C, SPI 电源电压:2.5 V to 5.25 V 电源电流:17 mA 工作温度:- 40 C to + 85 C 封装 / 箱体:SSOP-20 |
| MAX1234ETI+T | 功能描述:触摸屏转换器和控制器 4Ch uWire QSPI/SPI Touch Interface RoHS:否 制造商:Microchip Technology 类型:Resistive Touch Controllers 输入类型:3 Key 数据速率:140 SPS 分辨率:10 bit 接口类型:4-Wire, 5-Wire, 8-Wire, I2C, SPI 电源电压:2.5 V to 5.25 V 电源电流:17 mA 工作温度:- 40 C to + 85 C 封装 / 箱体:SSOP-20 |
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