參數(shù)資料
型號(hào): AK4673EG
廠商: Asahi Kasei Microsystems Co.,Ltd
元件分類: Codec
英文描述: Stereo CODEC with MIC/HP-AMP and Touch Screen Controller
中文描述: 立體聲編解碼器麥克風(fēng)/惠普- AMP及觸摸屏控制器
文件頁數(shù): 69/107頁
文件大?。?/td> 1171K
代理商: AK4673EG
[AK4673]
MS0670-E-00
2007/09
- 69 -
TSC OPERATION OVERVIEW
A/D Converter for Touch Screen
The AK4673 incorporates a 12-bit successive approximation resistor (SAR) A/D converter for position measurement.
The architecture is based on a capacitive redistribution algorithm, and an internal capacitor array functions as the
sample/hold (S/H) circuit.
The SAR A/D converter output is a straight binary format as shown below:
Input Voltage
(
Δ
VREF-1.5LSB)~
Δ
VREF
(
Δ
VREF-2.5LSB) ~
(
Δ
VREF-1.5LSB)
---------
0.5LSB ~ 1.5LSB
0 ~ 0.5LSB
Δ
VREF: (VREF+) – (VREF-)
Table 58 Output Code
The Block Diagram of TSC block
Figure 62
shows the block diagram in touch screen controller block that consists of the 12bit ADC and control block of
the driver switches and peninterrupt output.
Output Code
FFFH
FFEH
---------
001H
000H
PEN
INTERRUPT
PENIRQN
VSS3
AIN+
12bit
ADC
(SAR type)
AIN-
VREF+
VREF-
Control
Logic
Block
TSVDD
XP Driver SW
YP Driver SW
XN Driver SW
YN Driver SW
TSVDD
TSVDD
YP
XN
YN
XP
Figure 62 Touch Screen Controller Block Diagram
相關(guān)PDF資料
PDF描述
AK4682 Multi-channel CODEC with 2Vrms Stereo Selector
AK4682EQ Multi-channel CODEC with 2Vrms Stereo Selector
AK4683_07 Asynchronous Multi-Channel Audio CODEC with DIR/T
AK4683EQ Asynchronous Multi-Channel Audio CODEC with DIR/T
AK4683 Asynchronous Multi-Channel Audio CODEC with DIR/T
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AK4675 制造商:AKM 制造商全稱:AKM 功能描述:Stereo CODEC with MIC/RCV/HP/SPK-AMP
AK4675EG 制造商:AKM 制造商全稱:AKM 功能描述:Stereo CODEC with MIC/RCV/HP/SPK-AMP
AK4682 制造商:AKM 制造商全稱:AKM 功能描述:Multi-channel CODEC with 2Vrms Stereo Selector
AK4682AEQ 功能描述:IC CODEC MULTI-CHANNEL 48LQFP 制造商:akm semiconductor inc. 系列:* 零件狀態(tài):上次購買時(shí)間 標(biāo)準(zhǔn)包裝:1,000
AK4682EQ 制造商:AKM 制造商全稱:AKM 功能描述:Multi-channel CODEC with 2Vrms Stereo Selector