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Touch MCU

CST3240

The CST3240 series multi point capacitive touch chip supports single-layer, multi-layer modules, and multiple patterns. It adopts multiple high-voltage drives above 7V to achieve high-performance, high sensitivity, and realistic multi finger touch effects. Compared to traditional single channel low-voltage drives, it can provide higher signal-to-noise ratio and anti-interference ability. At the same time, the chip‘s internal self integrating capacitive sensing module, combined with intelligent scanning algorithms, achieves fast response while also exhibiting excellent noise resistance, waterproofing, and low power consumption performance.
    CST3240概述:
        The CST3240 series multi point capacitive touch chip supports single-layer, multi-layer modules, and multiple patterns. It adopts multiple high-voltage drives above 7V to achieve high-performance, high sensitivity, and realistic multi finger touch effects. Compared to traditional single channel low-voltage drives, it can provide higher signal-to-noise ratio and anti-interference ability. At the same time, the chip‘s internal self integrating capacitive sensing module, combined with intelligent scanning algorithms, achieves fast response while also exhibiting excellent noise resistance, waterproofing, and low power consumption performance.
        CST3240系列多點(diǎn)電容觸控芯片,支持單層,多層模組及多種圖案,采用多路 7V 以上高壓驅(qū)動(dòng),實(shí)現(xiàn)高性能,高靈敏度真實(shí)多指觸摸效果。相較傳統(tǒng)的單路低壓驅(qū)動(dòng)可提供更高的信噪比和抗干擾能力。同時(shí),芯片內(nèi)部自互一體電容感應(yīng)模塊,結(jié)合智能掃描算法,在實(shí)現(xiàn)快速反應(yīng)的同時(shí),具有優(yōu)異的抗噪、防水、低功耗表現(xiàn)。

    CST3240特性:
    高性能電容檢測(cè)電路及DSP模塊
      自互一體檢測(cè)模塊;
      多路高壓同時(shí)驅(qū)動(dòng),實(shí)現(xiàn)高靈敏度,高信噪比采樣;
      動(dòng)態(tài)寬范圍跳頻技術(shù),支持更強(qiáng)的抗干擾能力;
      支持被動(dòng)電容觸摸筆;
      支持待機(jī)手勢(shì)喚醒功能;
      支持在線編程;
      內(nèi)置看門狗;
      多個(gè)按鍵支持。
    性能指標(biāo)
      典型刷新率 100Hz;
      帶水操作,大拇指識(shí)別及大手掌抑制;
      動(dòng)態(tài)模式下典型功耗:10mA;
      監(jiān)控模式下典型功耗:4mA(30Hz);
      睡眠模式下典型功耗:20uA。
    電容屏支持
      最多支持 40 個(gè)驅(qū)動(dòng)/感應(yīng)通道,并支持TX/RX 互換;
      通道懸空/下拉設(shè)計(jì)支持;
      支持傳統(tǒng)的 DITO 和 SITO 及各種圖案;
      模組參數(shù)自動(dòng)調(diào)校,最大支持阻抗達(dá) 60K;
      Cover Lens 厚度支持,玻璃<= 2mm 亞克力<=1mm。
    通訊接口
      I2C 主/從通訊接口,速率 50Khz~400Khz可配置;
      GPIO 支持,多種工作模式可配,內(nèi)置上拉電阻模式;
      內(nèi)置 1.8V LDO,兼容 1.8V/VDDA 接口電平可配。
    電源供電
      單電源供電 2.8~3.6V,請(qǐng)參考電路設(shè)計(jì),電源紋波<=50mv; ? 少量的外圍器件。
      封裝類型:QFN52L 6*6

    CST3240應(yīng)用:
    手機(jī),平板,筆記本,觸摸板等。

    CST3240典型應(yīng)用電路圖:
    C1:2.2uF/10V C2: 1uF/10V
    C3:100nF/10V C4: 1uF/10V
    VDDIO:VDDA或者VCC18,根據(jù)IIC、SPI通訊及RSTn電壓決定。
    R1/R2: I2C 總線上拉電阻,也可配置芯片內(nèi)部5K上拉電阻代替。
    GPIO:可作為INT,也可作為SensorID配置懸空或者接GND。
    CST3240引腳排列:
    CST3240引腳描述:


    CST3240訂購(gòu)信息:
    料號(hào)
    封裝
    表面印字
    包裝
    CST3240
    QFN52L 6*6
    CST3240
    XXXXX
    (生產(chǎn)跟蹤碼)
    4000/盤,編帶出貨

    CST3240功能框圖:
    Please submit your basic information and send an email Sales@ChipSourceTek.com , or call us at 13823761625 (the same number as wechat), and we will contact you as soon as possible!

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