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ADSEMI触摸控制芯片外部器件设计参考-触控科技
ADS Touch IC Quick Design Manual
Name (Components) | Description | Remarks |
Sensing Series Resistor ( Rs ) | - sense input 보호 저항. -1kΩ 이하로 사용을 권장 한다. | 10mm 이내 |
Sensing input pin (CSx) | -사용하지 않는 Sensing port 는 10pF 연결하여 준다. (I2C 기능이 없는 IC) -사용하지 않는 Sensing port 를 Open 하고, Sensing Control Register 에서 Disable 하여 준다. (I2C control) | |
I2C Series Resistor | -I2C (SDA, SCL) 보호 저항. -10Ω ~ 100Ω 사용을 권장 한다. | |
Output pin (Dx) | -사용하지 않는 Output port 는 GND 로 연결하여야 한다. | |
Bias Resistor (RB) | -내부 Bias 전류 조절. -System clock speed 조절 -1% 편차 저항 사용을 권장 한다. - Bias 저항을 GND 로 Shield 하여 외부 Noise 원으로 부터 보호하여 주십시오. | 5mm 이내 |
Bias Stabilizer Capacitor (CB) | -Connect to VDD -820pF(or 1nF) capacitor is recommended | 5mm 이내 |
Bypass Capacitor | -1uF capacitor is recommended. | 5mm 이내 |
Noise Detection (RND, Dummy) | -주변회로에 영향을 받지 않도록 GND 로 Shield 처리 하십시오. | 5mm 이내 |
LDO capacitor (LCAP) | -IC 내부 Digital Block 의 구동 전원 공급. ( 외부 회로에 연결하지 마시오) | 5mm 이내 |
Touch Sensing line Design | -Sensing line 은 0.15 mm ~ 0.25 mm의 두께를 가지도록 설계 하시오. -Touch Sensing line 을 GND 로 Shield 하여 Noise 원이 될 수 있는 다른 신호 Line 과 분리하시오. | |
Touch PAD Design | -Touch PAD 를 GND 로 약 1mm ~ 2mm 이격 하여 Shield 처리 하시오. | |
When PCB Layout | -Touch IC 의 주변 회로 부품은 IC 에 가깝게 배치되어야 합니다. -Bias 회로, Bypass capacitor, RND capacitor, LCAP capacitor 가 우선적으로 가깝게 배치되어야 한다. |
Name (Components) | Description | Remarks |
Sensing Series Resistor ( Rs ) | - Protection resistor of sensing input -Under 1kΩ is recommended | Within 10mm |
Sensing input pin (CSx) | -Unused CS pins should be connected to 10pF capacitor (IC without I2C function) -Unused CS pins may be open, it must be disabled in the Sensing Control Register (IC with I2C function) | |
I2C Series Resistor | -Protection resistor of I2C in/out put. -10Ω ~ 100Ω is recommended. | |
Output pin (Dx) | -The unused Output port should be connected to GND | |
Bias Resistor (RB) | -Internal bias current adjustment -System clock speed adjustment -1% deviation resistor is recommended -Protect the Bias resistor from external Noise source by shielding it with GND | Within 5mm |
Bias Stabilizer Capacitor (CB) | -Connect to VDD -820pF(or 1nF) capacitor is recommended | Within 5mm |
Bypass Capacitor | -1uF capacitor is recommended. | Within 5mm |
Noise Detection (RND, Dummy) | -Shield the RND capacitor with GND not to be affected by peripheral circuits. | Within 5mm |
LDO capacitor (LCAP) | -Internal Digital block power supply (Do not connect to an external circuit) | Within 5mm |
Touch Sensing line Design | -The sensing line shall be designed to have a minimum thickness of 0.15 mm ~ 0.25 mm. -Shield the Touch Sensing line with GND to separate it from other signal lines that can be noise source. | |
Touch PAD Design | -Shield the Touch PAD with GND at a distance of 1 ~ 2mm. | |
When PCB Layout | -All circuit components of Touch IC should be located close to the Touch IC. -Bias circuit, Bypass capacitor, RND capacitor, LCAP capacitor should be arranged in priority. |
Name (Components) | Description | Remarks |
Sensing Series Resistor ( Rs ) | - sense input 保护 阻力. -推荐使用 11kΩ 以下. | 10mm 以内 |
Sensing input pin (CSx) | -没使用的 Sensing port 是 10pF 连接. (没有I2C 技能的IC) -没使用的 Sensing port 是 做Open, Sensing Control Register 中 做Disable. (I2C control) | |
I2C Series Resistor | -I2C (SDA, SCL)保护 阻力. -推荐使用 10Ω ~ 100Ω. | |
Output pin (Dx) | -没使用的 Output port 是 连接 GND. | |
Bias Resistor (RB) | -内部 Bias 调整 电流. -调整 System clock speed. -推荐使用 1% 偏差电流. - Bias 电阻 GND 做 Shield 外部 自 Noise 保护. | 5mm 以内 |
Bias Stabilizer Capacitor (CB) | -连接 VDD. -820pF(or 1nF) 推荐电容. | 5mm以内 |
Bypass Capacitor | -1uF 电容 推荐. | 5mm以内 |
Noise Detection (RND, Dummy) | -周边电路以没收到影响 做GND 处理Shield. | 5mm以内 |
LDO capacitor (LCAP) | -IC 内部 Digital Block 驱动 电源 供电. ( 不能连接外部电路.) | 5mm以内 |
Touch Sensing line Design | -Sensing line 是 0.15 mm ~ 0.25 mm 设计具有厚度. -Touch Sensing line 是 以 GND 做 Shield , 尽量 Noise 其他 信号 Line 和 分离. | |
Touch PAD Design | -Touch PAD 是 GND 大约 1mm ~ 2mm 离开后 处理 Shield. | |
When PCB Layout | -Touch IC 周边 电路 零件是 从 IC 部署接近. -Bias 电路, Bypass capacitor, RND capacitor, LCAP capacitor 是 优先部署接近. |
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