參數(shù)資料
型號： AK4650
廠商： Asahi Kasei Microsystems Co.,Ltd
元件分類： Codec
英文描述： 16Bit ツヒ CODEC with MIC/HP/SPK-AMP & TSC
中文描述： 16位ツヒ編解碼器麥克風(fēng)/惠普/胰腎聯(lián)合移植腺苷
文件頁數(shù)： 45/86頁
文件大?。?/td> 824K
代理商： AK4650
[AK4650]
MS0502-E-01
2007/04
- 45 -
■
A/D Converter for Touch Screen
The AK4650 incorporates a 12-bit successive approximation resistor A/D converter for position measurement, and
battery voltage. The architecture is based on capacitive redistribution algorithm, and an internal capacitor array functions
as the sample/hold circuit.
The A/D converter output is a straight binary format as shown in Table 40:
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 40. Output Code
The A/D converter’s full scale measurements depend on the input mode.
■
Analog Inputs
Analog input is selected via the A2-0 and SER bits in the control register. If the analog inputs are the X or Y-axis and the
SER bit is set to “0”(differential mode), the full scale (
Δ
VREF) is the differential voltage between the non-inverting
terminal and the inverting terminal of the measured axis (e.g. (XP) – (XN)). Analog non-inverting input to A/D converter
(
Δ
AIN) is the non-inverting terminal of the non-measured axis while the inverting input is the inverting terminal of the
measured axis. If the SER bit is set to “1” (single-ended mode), the full scale of A/D converter (
Δ
VREF) is the internal
reference voltage, or external reference voltage. Note that the SER bit should be set to “0” if the IN2 pin is selected as
analog input; nevertheless, the IN2 pin is actually measured by single-ended mode.
SER bit
Analog Input Type
Δ
VREF
X-axis measurement: XP
XN
Y-axis measurement: YP
YN
1
Single-ended
VREF
TSVSS
Table 41. Analog Input Type,
Δ
VREF and
Δ
AIN
Output Code
FFFH
FFEH
:
001H
000H
Δ
AIN
0
Differential
X-axis measurement: YP
XN
Y-axis measurement: XP
YN
AIN
TSVSS
相關(guān)PDF資料
PDF描述
AK4650VG 16Bit ツヒ CODEC with MIC/HP/SPK-AMP & TSC
AK4651 16Bit ツヒ CODEC with MIC/HP/SPK-AMP
AK4651VG 16Bit ツヒ CODEC with MIC/HP/SPK-AMP
AK4665A 20-Bit Stereo CODEC with MIC/HP-AMP
AK4665AEN 20-Bit Stereo CODEC with MIC/HP-AMP
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AK4650VG 制造商:AKM 制造商全稱:AKM 功能描述:16Bit ツヒ CODEC with MIC/HP/SPK-AMP & TSC
AK4651 制造商:AKM 制造商全稱:AKM 功能描述:16Bit ツヒ CODEC with MIC/HP/SPK-AMP
AK4651VG 制造商:AKM 制造商全稱:AKM 功能描述:16Bit ツヒ CODEC with MIC/HP/SPK-AMP
AK4664VQ 功能描述:IC CODEC STEREO 20BIT LQFP 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
AK4665A 制造商:AKM 制造商全稱:AKM 功能描述:20-Bit Stereo CODEC with MIC/HP-AMP
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