參數(shù)資料
型號： MAX1234ETI+
廠商： Maxim Integrated Products
文件頁數(shù)： 22/44頁
文件大?。?/td> 0K
描述： IC CNTRLR TOUCH 28-TQFN
其它有關(guān)文件： Automotive Product Guide
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝： 60
類型： 電阻
觸摸面板接口： 4 線
輸入數(shù)/鍵： 1，4 x 4 小鍵盤
分辨率（位）： 8，10，12 b
數(shù)據(jù)接口： MICROWIRE?，QSPI?，串行，SPI?
數(shù)據(jù)速率/采樣率 (SPS，BPS)： 50k
電壓基準(zhǔn)： 內(nèi)部
電源電壓： 4.75 V ~ 5.25 V
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 28-TQFN 裸露焊盤
供應(yīng)商設(shè)備封裝： 28-TQFN-EP（5x5）
包裝： 管件
MAX1233/MAX1234
±15kV ESD-Protected Touch-Screen
Controllers Include DAC and Keypad Controller
______________________________________________________________________________________
29
DAC Data Register
The DAC data register stores data that is to be written
to the 8-bit DAC. Table 36 shows the configuration of
the DAC data register. It is right justified with bit 7–bit 0
storing the input data.
GPIO Data Register
Tables 37 and 38 show the format and descriptions for
the GPIO data register. The register is left justified with
data in bit 15–bit 8. Reading the GPIO data register
gives the state of the R_ and C_ pins. Data written to
the GPIO data register appears on those R_ and C_
pins, which are configured as general-purpose outputs.
Data written to pins not configured as general-purpose
outputs is not stored.
ADC Transfer Function
The MAX1233/MAX1234 output data is in straight bina-
ry format as shown in Figure 11. This figure shows the
ideal output code for the given input voltage and does
not include the effects of offset error, gain error, noise,
or nonlinearity.
Applications Information
Programmable 8-/10-/12-Bit Resolution
The MAX1233/MAX1234 provide the option of three dif-
ferent resolutions for the ADC: 8, 10, or 12 bits. Lower
resolutions are practical for some measurements such
as touch pressure. Lower resolution conversions have
smaller conversion times and therefore consume less
power. Program the resolution of the MAX1233/
MAX1234 12-bit ADCs by writing to the RES1 and RES0
bits in the ADC control register. When the MAX1233/
MAX1234 power up, both bits are set to zero so the res-
olution is set to 8 bits with a 31s internally timed refer-
ence power-up delay as indicated by the ADC
resolution control table. As explained in the control reg-
ister section, the RES1 and RES0 bits control the refer-
COMPONENT
C1
C2
C3
C4
R1
K0
K4
K8
K12
R2
K1
K5
K9
K13
R3
K2
K6
K10
K14
R4
K3
K7
K11
K15
Table 35. Keypad to Key Bit Mapping
BIT15
BIT14
BIT13
BIT12
BIT11
BIT10
BIT9
BIT8
BIT7
BIT6
BIT5
BIT4
BIT3
BIT2
BIT1
BIT0
000
0000
0
DA7
DA6
DA5
DA4
DA3
DA2
DA1
DA0
Table 36. DAC Data Register(Write 0x000B/Read 0x800B)
BIT15
BIT14
BIT13
BIT12
BIT11
BIT10
BIT9
BIT8
BIT7
BIT6
BIT5
BIT4
BIT3
BIT2
BIT1
BIT0
GPD7
GPD6
GPD5
GPD4
GPD3
GPD2
GPD1
GPD0
0
0000000
Table 37. GPIO Data Register (Write 0x000F/Read 0x800F)
BIT
NAME
DESCRIPTION
15...8
GPD7...0
GPIO data bits for GPIO pins 7...0
7...0
0
Reserved
Table 38. GPIO Data Register Bit Descriptions (Write 0x000F/Read 0x800F)
OUTPUT CODE
FULL-SCALE
TRANSITION
11 ... 111
11 ... 110
11 ... 101
00 ... 011
00 ... 010
00 ... 001
00 ... 000
3
0FS
FS - 3/2LSB
FS = VREF
ZS = GND
INPUT VOLTAGE (LSB)
1LSB =
VREF
4096
2
1
MAX1233
MAX1234
Figure 11. Ideal Input Voltages and Output Codes
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX1234ETI+ 功能描述:觸摸屏轉(zhuǎn)換器和控制器 4Ch uWire QSPI/SPI Touch Interface 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
MAX1234ETI+T 功能描述:觸摸屏轉(zhuǎn)換器和控制器 4Ch uWire QSPI/SPI Touch Interface 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
MAX1234EVC16 功能描述:數(shù)據(jù)轉(zhuǎn)換 IC 開發(fā)工具 MAX1233/34 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
MAX1234EVKIT 制造商:Maxim Integrated Products 功能描述:+15KV ESD-PROTECTED TOUCH-SCREEN CO - Rail/Tube
MAX1236EUA 功能描述:模數(shù)轉(zhuǎn)換器 - ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
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