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參數(shù)資料
| 型號： | AD7877ACBZ-REEL7 |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 31/45頁 |
| 文件大小： | 0K |
| 描述： | IC CTRLR TOUCH SCREEN 25-WLCSP |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 類型： | 電阻 |
| 觸摸面板接口： | 4 線 |
| 輸入數(shù)/鍵： | 1 TSC |
| 分辨率（位）： | 12 b |
| 評估套件： | 可供 |
| 數(shù)據(jù)接口： | 串行，SPI? |
| 數(shù)據(jù)速率/采樣率 (SPS，BPS)： | 125k |
| 電壓基準(zhǔn)： | 外部，內(nèi)部 |
| 電源電壓： | 2.7 V ~ 5.25 V |
| 電流 - 電源： | 1µA |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 25-UFBGA，WLCSP |
| 供應(yīng)商設(shè)備封裝： | 25-WLCSP |
| 包裝： | 標(biāo)準(zhǔn)包裝 |
| 產(chǎn)品目錄頁面： | 779 (CN2011-ZH PDF) |
| 配用： | EVAL-AD7877EBZ-ND - BOARD EVALUATION FOR AD7877 |
| 其它名稱： | AD7877ACBZ-REEL7DKR |
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AD7877
Data Sheet
Rev. D | Page 36 of 44
Register Name: Control Register 2
Write Address: 0010
Read Address:
00010
Default Value:
0x000
Type:
Read/write
Table 17.
Bit
Name
Read/Write
Description
0
TMR0
R/W
LSB of conversion interval timer
1
TMR1
R/W
MSB of conversion interval timer
00 = convert only once
01 = every 1024 clock periods (512 s)
10 = every 2048 clock periods (1.024 ms)
11 = every 16,384 clock periods (8.19 ms)
2
REF
R/W
Selects internal or external reference
0 = internal reference
1 = external reference
3
POL
R/W
Indicates polarity of signal on STOPACQ pin
0 = active low
1 = active high
4
FCD0
R/W
LSB of first conversion delay
5
FCD1
R/W
MSB of first conversion delay
This delay occurs before the first conversion after powering up the ADC, before converting the X and Y
coordinate channels to allow settling, and after the last conversion to allow PENIRQ precharge
00 = 1 clock period delay (500 ns)
01 = 256 clock periods delay (128 s)
10 = 2048 clock periods delay (1.024 ms)
11 = 16,384 clock periods delay (8.19 ms)
6
PM0
R/W
LSB of ADC power management code
7
PM1
R/W
MSB of ADC power management code
00 = ADC and reference powered down continuously
For the following codes, regardless of PM bits, the reference is always powered down if the REF bit is 1:
01 = ADC and reference powered down when not converting
10 = ADC and reference powered up continuously (master sequencer does not work if PM = 10)
11 = ADC powered down when not converting, reference powered up
8
ACQ0
R/W
LSB of ADC acquisition time
9
ACQ1
R/W
MSB of ADC acquisition time
00 = 4 clock periods (2 s)
01 = 8 clock periods (4 s)
10 = 16 clock periods (8 s)
11 = 32 clock periods (16 s)
10
AVG0
R/W
LSB of ADC averaging code
11
AVG1
R/W
MSB of ADC averaging code
00 = no averaging (1 conversion per channel)
01 = 4 measurements per channel averaged
10 = 8 measurements per channel averaged
11 = 16 measurements per channel averaged
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