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±15kV ESD-Protected Touch-Screen
Controllers Include DAC and Keypad Controller
Typical Operating Characteristics (continued)
(AV DD = DV DD = 3V (MAX1233) or 5V (MAX1234), external V REF = +2.5V (MAX1233), external V REF = +4.096V (MAX1234), f SCLK =
10MHz (50% duty cycle), f SAMPLE = 20ksps, C LOAD = 50pF, 0.1μF capacitor at REF, T A = +25°C, unless otherwise noted.)
750
700
650
600
550
ADC REFERENCE SUPPLY CURRENT
vs. ANALOG SUPPLY VOLTAGE
750
700
650
600
550
REFERENCE SUPPLY CURRENT
vs. TEMPERATURE
2.7
3.2
3.7
4.2
4.7
5.2
-40 -25 -10
5
20
35
50
65
80
AV DD (V)
TEMPERATURE ( ° C)
Pin Description
PIN
1
2
3*
4*
5*
6*
7
8*
9*
10*
11*
12
13
14
15
16
17
18
NAME
DV DD
AV DD
X+
Y+
X-
Y-
GND
BAT1
BAT2
AUX1
AUX2
REF
DACOUT
R4
R3
R2
R1
C1
FUNCTION
Positive Digital Supply Voltage, +2.7V to +3.6V for MAX1233, +4.75V to +5.25V for MAX1234. Bypass
with a 0.1μF capacitor. Must be within 300mV of AV DD .
Positive Analog Supply Voltage, +2.7V to +3.6V for MAX1233, +4.75V to +5.25V for MAX1234.
Bypass with a 0.1μF capacitor. Must be within 300mV of DV DD .
X+ Position Input
Y+ Position Input
X- Position Input
Y- Position Input
Analog and Digital Ground
Battery Monitoring Input 1. Measures battery voltages up to 6V.
Battery Monitoring Input 2. Measures battery voltages up to 6V.
Auxiliary Analog Input 1 to ADC. Measures analog voltages from zero to V REF .
Auxiliary Analog Input 2 to ADC. Measures analog voltages from zero to V REF .
Voltage Reference Output/Input. Reference voltage for analog-to-digital conversion. In internal
reference mode, the reference buffer provides a 2.5V or 1.0V nominal output. In external reference
mode, apply a reference voltage between 1.0V and AV DD . Bypass REF to GND with a 0.1μF
capacitor in the external reference mode only.
DAC Voltage Output; 0.9 × AV DD Full Scale
Keypad Row 4. Can be reconfigured as GPIO3.
Keypad Row 3. Can be reconfigured as GPIO2.
Keypad Row 2. Can be reconfigured as GPIO1.
Keypad Row 1. Can be reconfigured as GPIO0.
Keypad Column 1. Can be reconfigured as GPIO4.
______________________________________________________________________________________
11
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MAX1234EVKIT 制造商:Maxim Integrated Products 功能描述:+15KV ESD-PROTECTED TOUCH-SCREEN CO - Rail/Tube
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MAX1236EUA+ 功能描述:模数转换器 - ADC 12-Bit 4Ch 94.4ksps 5.5V Precision ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32
MAX1236EUA+T 功能描述:模数转换器 - ADC 12-Bit 4Ch 94.4ksps 5.5V Precision ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32
MAX1236EUA-T 功能描述:模数转换器 - ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32
MAX1236EVKIT 功能描述:数据转换 IC 开发工具 MAX1236 Eval Kit RoHS:否 制造商:Texas Instruments 产品:Demonstration Kits 类型:ADC 工具用于评估:ADS130E08 接口类型:SPI 工作电源电压:- 6 V to + 6 V
MAX1236KEUA 功能描述:模数转换器 - ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32
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