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參數(shù)資料
| 型號： | AK4182AVN |
| 廠商： | Asahi Kasei Microsystems Co.,Ltd |
| 英文描述： | Touch Screen Controller |
| 中文描述： | 觸摸屏控制器 |
| 文件頁數(shù)： | 9/18頁 |
| 文件大?。?/td> | 186K |
| 代理商： | AK4182AVN |
ASAHI KASEI
[AK4182A]
MS0482-E-00
2006/03
9
ON
YN
VREF+
VREF-
ADC
AIN+
AIN-
XP
YP
XN
ON
a) Z1-Position Measurement Differential Mode
touch
ON
YN
VREF+
VREF-
ADC
AIN+
AIN-
XP
YP
XN
ON
b) Z2-Position Measurement Differential Mode
touch
Figure 3 Pen Pressure Measurements
Voltage Reference
The AK4182A has an internal 2.5V voltage reference. This reference can be turned ON when PD1 = “1”, and OFF when PD1 =
“0”. This reference is used in the single-ended mode for the battery monitoring, temperature measurement, or for auxiliary input.
A 0.1
μ
F or larger capacitor should be connected for stable operation of the VREF circuit. Settling time depends on this external
capacitance, but 500
μ
s or longer time is required if the external capacitance is 0.1
μ
F.
If an external voltage reference is used, PD1 bit should be set to “0”.
VCC should be more than 2.7V in order to be stable internal output reference when PD1 = “1” (internal voltage reference).
Battery Measurement
The AK4182A can directly measure the battery voltage up to 5V while the AK4182A operates at 2.2V to 3.6V. The VBAT input
voltage is divided internally by the resistance of R1 (7.5k
) and R2 (2.5k
) and applied to the input of AD converter (AIN+) as
shown in Figure 4. Minimum 5
μ
s is required as tracking time.
.
PD1
Internal
VREF(2.5V)
R1=7.5K
R2=2.5K
VBAT
ADC
Enable
R0
AIN+
AIN-
VREF+
VREF-
VREF
Figure 4 Battery Monitoring
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AK4182 | Touch Screen Controller |
| AK4182VN | Touch Screen Controller |
| AK4183 | I2C Touch Screen Controller |
| AK4183VT | I2C Touch Screen Controller |
| AK4184 | TSC with Keypad Scanner and GPIO Expander |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AK4182VN | 制造商:AKM 制造商全稱:AKM 功能描述:Touch Screen Controller |
| AK4183 | 制造商:AKM 制造商全稱:AKM 功能描述:I2C Touch Screen Controller |
| AK4183_08 | 制造商:AKM 制造商全稱:AKM 功能描述:I2C Touch Screen Controller |
| AK4183KT | 制造商:AKM 制造商全稱:AKM 功能描述:I2C Touch Screen Controller |
| AK4183VT | 制造商:AKM 制造商全稱:AKM 功能描述:I2C Touch Screen Controller |
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