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參數資料
| 型號： | UCB1400 |
| 廠商： | NXP Semiconductors N.V. |
| 元件分類： | Codec |
| 英文描述： | Audio codec with touch screen controller and power management monitor |
| 中文描述： | 音頻編解碼器與觸摸屏控制器和電源管理監控 |
| 文件頁數： | 26/63頁 |
| 文件大小： | 674K |
| 代理商： | UCB1400 |
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Philips Semiconductors
UCB1400
Audio codec with touch screen controller
and power management monitor
Product data
Rev. 02 — 21 June 2002
26 of 63
9397 750 09611
Koninklijke Philips Electronics N.V. 2002. All rights reserved.
The UCB1400’s internal voltage reference (V
ref
) acts as the reference voltage for the
touch screen bias circuitry. This makes the touch screen biasing independent of
supply voltage and temperature variations. Four low pass filters, one on each touch
screen terminal, are built in to minimize the noise coupled from the LCD into the
touch screen signals. An LCD typically generates large noise glitches on the touch
screen, since they are closely coupled.
The setting of the touch screen bias circuitry and the ADC multiplexer is determined
by the setting of TM[1:0] in the touch screen control register according to
Table 8
.
10.2 Operational modes
The UCB1400 supports three modes of touch screen measurements: position,
pressure, and plate resistances. Additionally, an interrupt mode is provided for
detection of touch events.
10.2.1
Position measurement
Two position (X, Y) measurements are needed to determine the location of the
pressed spot. The X plate is biased during the X position measurement and the
voltage on one or both Y terminals (TSPY, TSMY) is measured. The circuit can be
represented by a potentiometer, with the TSPY and/or TSMY electrode being the
‘wiper’. The measured voltage on the TSPY/TSMY terminal is proportional to the X
position of the pressed spot of the touch screen.
In the Y position mode, the X plate and Y plate terminals are interchanged, thus the Y
plate is biased and the voltage on the TSPX and/or TSMX terminal is measured.
Table 8:
TM[1:0]
00
01
10
11
Touch screen mode selection
Selected mode
Interrupt
Pressure
Position
Position
Touch screen bias source
Resistor to AV
DD
Touch screen bias circuit
Touch screen bias circuit
Touch screen bias circuit
ADC multiplexer setting
Defined by AI[2:0]
Touch screen current monitor
Defined by AI[2:0]
Defined by AI[2:0]
Fig 18. Touch screen setup for X position measurement.
TSPY
TSMX
TSPX
VBIAS
TO ADC
TSMY
TO ADC
TSPY
TSPX
VBIAS
TSMY
TSMX
TOUCH
R
Y1
R
Y2
R
t
R
X1
R
X2
SN00247
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相關代理商/技術參數 |
參數描述 |
|---|---|
| UCB1400BE | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Audio codec with touch screen controller and power management monitor |
| UCB1400BE,128 | 功能描述:接口—CODEC AUDIO CODEC WITH TOUCHSCREEN RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉換速率:48 kSPs 接口類型:I2C ADC 數量:2 DAC 數量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel |
| UCB1400BE,151 | 功能描述:接口—CODEC AUDIO CODEC RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉換速率:48 kSPs 接口類型:I2C ADC 數量:2 DAC 數量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel |
| UCB1400BE,157 | 功能描述:接口—CODEC DO NOT USE ORDER -S OR -T PART RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉換速率:48 kSPs 接口類型:I2C ADC 數量:2 DAC 數量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel |
| UCB1400BEFE | 功能描述:IC AUDIO CODEC W/TCH SCRN 48LQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 編解碼器 系列:- 標準包裝:2,500 系列:- 類型:立體聲音頻 數據接口:串行 分辨率（位）:18 b ADC / DAC 數量:2 / 2 三角積分調變:是 S/N 比，標準 ADC / DAC (db):81.5 / 88 動態范圍，標準 ADC / DAC (db):82 / 87.5 電壓 - 電源，模擬:2.6 V ~ 3.3 V 電壓 - 電源，數字:1.7 V ~ 3.3 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-WFQFN 裸露焊盤 供應商設備封裝:48-TQFN-EP（7x7） 包裝:帶卷 (TR) |
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