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参数资料
| 型号： | MAX1233 |
| 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，包含DAC及键盘控制器 |
| 文件页数： | 31/44页 |
| 文件大小： | 706K |
| 代理商： | MAX1233 |
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Battery-Voltage Monitors
Two dedicated analog inputs (BAT1 and BAT2) allow the
MAX1233/MAX1234 to monitor the battery voltages prior
to the DC/DC converter.
Figure
14 shows the battery volt-
age monitoring circuitry. The MAX1233/ MAX1234 direct-
ly monitor battery voltages from 0.5V to 6V. An internal
resistor network divides down BAT1 and BAT2 by 4 so
that a 6V battery voltage results in a 1.5V input to the
ADC. To minimize power consumption, the divider is only
enabled during the sampling of BAT1 and BAT2.
Figure
15 illustrates the process of battery input reading.
M
±15kV ESD-Protected Touch-Screen
Controllers Include DAC and Keypad Controller
______________________________________________________________________________________
31
TOUCH
X-POSITION
SENSE LINE
OPEN CIRCUIT
X+
X-
Y+
Y-
FORCE LINE
SENSE LINE
MEASURE X-POSITION
FORCE LINE
V
TOUCH
Z1-RESISTANCE
OPEN CIRCUIT
X+
X-
Y+
Y-
FORCE LINE
SENSE LINE
MEASURE Z1-RESISTANCE
FORCE LINE
V
V
TOUCH
Z2-RESISTANCE
OPEN CIRCUIT
X+
X-
Y+
Y-
FORCE LINE
FORCE LINE
MEASURE Z2-RESISTANCE
Figure 13. Pressure Measurement Block Diagram
CONVERTER
0.125V TO 1.5V
2.5k
7.5k
V
BAT
BATTERY
0.5V TO
6.0V
DC/DC
CONVERTER
2.7V
AV
DD
Figure 14. Battery Measurement Block Diagram
BATTERY INPUT 1 OR
BATTERY INPUT 2
DONE
NO
IS DATA
AVERAGING DONE
STORE BATTERY INPUT 1 OR 2 IN
BAT1 OR BAT2 REGISTER
POWER DOWN
ADC
POWER UP
ADC
POWER UP REFERENCE
CONVERT
BATTERY INPUT 1 OR 2
POWER DOWN REFERENCE
TURN OFF CLOCK
HOST WRITES
ADC
CONTROL REGISTER
START CLOCK
IS ADC
REFERENCE IN
AUTO POWER-DOWN
MODE
NO
YES
SET BUSY
LOW
YES
SET BUSY HIGH
Figure 15. Battery Voltage-Reading Flowchart
相关PDF资料 |
PDF描述 |
|---|---|
| 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 |
| MAX1239MEEE | Circular Connector; No. of Contacts:128; Series:D38999; Body Material:Metal; Connecting Termination:Crimp; Connector Shell Size:25; Circular Contact Gender:Pin; Circular Shell Style:Wall Mount Receptacle; Insert Arrangement:25-35 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1233EGI | 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 |
| MAX1233EGI+ | 制造商:Maxim Integrated Products 功能描述: |
| MAX1233EGI-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 |
| MAX1233ETI+ | 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 |
| MAX1233ETI+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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