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| 型号： | AD7877ACBZ-REEL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 15/45页 |
| 文件大小： | 0K |
| 描述： | IC CTRLR TOUCH SCREEN 25-WLCSP |
| 标准包装： | 10,000 |
| 类型： | 电阻 |
| 触摸面板接口： | 4 线 |
| 输入数/键： | 1 TSC |
| 分辨率（位）： | 12 b |
| 评估套件： | 可供 |
| 数据接口： | 串行，SPI? |
| 数据速率/采样率 (SPS，BPS)： | 125k |
| 电压基准： | 外部，内部 |
| 电源电压： | 2.7 V ~ 5.25 V |
| 电流 - 电源： | 1µA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 25-UFBGA，WLCSP |
| 供应商设备封装： | 25-WLCSP |
| 包装： | 带卷 (TR) |
| 配用： | EVAL-AD7877EBZ-ND - BOARD EVALUATION FOR AD7877 |
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Data Sheet
AD7877
Rev. D | Page 21 of 44
Table 6. Codes for Selecting Input Channel and Normal or Ratiometric Conversion
Channel
SER/DFR
CHADD(3:0)
Analog Input
X Switches
Y Switches
+REF
REF
0
0 0 0 0
X+ (Y position)
Off
On
Y+
Y
1
0
0 0 0 1
Y+ (X position)
On
Off
X+
X
2
0
0 0 1 0
Y (Z2)
X+ off, X on
Y+ on, Y off
Y+
X
3
0
0 01 1
AUX1
Off
VREF
GND
4
0
0 1 00
AUX2
Off
VREF
GND
5
0
0 1 0 1
AUX3
Off
VREF
GND
6
0
0 1 1 0
BAT1
Off
VREF
GND
7
0
0 1 1 1
BAT2
Off
VREF
GND
8
0
1 0 0 0
TEMP1
Off
VREF
GND
9
0
1 0 0 1
TEMP2
Off
VREF
GND
10
0
1 0 1 0
X+ (Z1)
X+ OFF, X ON
Y+ on Y off
Y+
X
-
0
1 0 1 1
Invalid address
-
0
1 1 0 0
Invalid address
-
0
1 1 0 1
Invalid address
-
0
1 1 1 0
Invalid address
-
0
1 1 1 1
Invalid address
0
1
0 0 0 0
X+ (Y position)
Off
On
VREF
GND
1
0 0 0 1
Y+ (X position)
On
Off
VREF
GND
2
1
0 0 1 0
Y (Z2)
X+ off, X on
Y+ on, Y off
VREF
GND
3
1
0 0 1 1
AUX1
Off
VREF
GND
4
1
0 1 0 0
AUX2
Off
VREF
GND
5
1
0 1 0 1
AUX3
Off
VREF
GND
6
1
0 1 1 0
BAT1
Off
VREF
GND
7
1
0 1 1 1
BAT2
Off
VREF
GND
8
1
1 0 0 0
TEMP1
Off
VREF
GND
9
1
1 0 0 1
TEMP2
Off
VREF
GND
10
1
1 0 1 0
X+ (Z1)
X+ off, X on
Y+ on, Y off
VREF
GND
-
1
10 1 1
Invalid address
-
1
1 1 0 0
Invalid address
-
1
1 1 0 1
Invalid address
-
1
1 1 1 0
Invalid address
-
1
1 1 1 1
Invalid address
CONTROL REGISTER 2
Timer (Control Register 2, Bits[1:0])
The TMR bits in Control Register 2 enable the ADC to
repeatedly perform a conversion or conversion sequence either
once only or at intervals of 512 s, 1.024 ms, or 8.19 ms. In slave
mode, the timer starts as soon as the conversion sequence is
finished. In master mode, the timer starts at the end of a
conversion sequence only if the screen remains touched. If the
touch is released at any stage, then the timer stops and, the next
time the screen is touched, a conversion sequence begins
immediately.
Table 7. Control Register 2 Timer Selection
TMR1
TMR0
Function
0
Convert only once (default)
0
1
Every 1024 clocks (512 s)
1
0
Every 2048 clocks (1.024 ms)
1
Every 16,384 clocks (8.19 ms)
Int/Ext Reference (Control Register 2, Bit[2])
If the REF bit in Control Register 2 is 0 (default value), the
internal reference is selected. Buffer any connection made to
VREF while the internal reference is selected (for example, to
supply a reference to other circuits). An external power supply
should not be connected to this pin while REF is equal to 0,
because it might overdrive the internal reference. Because the
internal reference is 2.5 V, it operates only with supply voltages
down to 2.7 V. Below this value, use an external reference.
If the REF bit is 1, the VREF pin becomes an input and the
internal reference is powered down. This overrides any setting
of the PM bits with regard to the reference. An external
reference can then be applied to the REF pin.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD7877ACBZ-REEL7 | 功能描述:IC CTRLR TOUCH SCREEN 25-WLCSP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 触摸屏控制器 系列:- 标准包装:96 系列:- 类型:- 触摸面板接口:- 输入数/键:- 分辨率（位）:- 评估套件:* 数据接口:- 数据速率/采样率 (SPS，BPS):- 电压基准:- 电源电压:- 电流 - 电源:- 工作温度:- 安装类型:表面贴装 封装/外壳:16-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:16-TSSOP 包装:带卷 (TR) |
| AD7877ACP | 制造商:Analog Devices 功能描述:TOUCH SCREEN CNTRLR 32LFCSP - Bulk |
| AD7877ACP-500RL7 | 制造商:Analog Devices 功能描述:TOUCH SCREEN CONTROLLER |
| AD7877ACP-REEL | 制造商:AD 制造商全称:Analog Devices 功能描述:Touch Screen Controller |
| AD7877ACP-REEL7 | 制造商:Analog Devices 功能描述:TOUCH SCREEN CONTROLLER |
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