參數(shù)資料
型號(hào)： AD7148ACPZ-1500RL7
廠商： Analog Devices Inc
文件頁數(shù)： 14/57頁
文件大?。?/td> 0K
描述： IC CAP-TO-DGTL CONV PROG 16LFCSP
標(biāo)準(zhǔn)包裝： 1
類型： 電容性
觸摸面板接口： 2 線
輸入數(shù)/鍵： 8 鍵
分辨率（位）： 16 b
數(shù)據(jù)接口： I²C，串行
數(shù)據(jù)速率/采樣率 (SPS，BPS)： 250k
電壓基準(zhǔn)： 內(nèi)部
電源電壓： 2.6 V ~ 3.3 V
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 16-VQFN 裸露焊盤，CSP
供應(yīng)商設(shè)備封裝： 16-LFCSP
包裝： 標(biāo)準(zhǔn)包裝
產(chǎn)品目錄頁面： 781 (CN2011-ZH PDF)
其它名稱： AD7148ACPZ-1500RL7DKR
AD7148
Rev. A | Page 20 of 56
071
55
-0
29
PROXIMITY SENSITIVITY
The fast filter in Figure 30 is used to detect when someone is
close to the sensor (proximity). Two conditions set the internal
proximity detection signal, using Comparator 1 and Comparator 2.
Comparator 1 detects when a user is approaching a sensor. The
PROXIMITY_DETECTION_RATE bits (Address0x003[13:8])
controls the sensitivity of Comparator 1. For example, if
PROXIMITY_DETECTION_RATE is set to 4, the Proximity 1
signal is set when the absolute difference between WORD1 and
WORD3 exceeds (4 × 16) LSB codes. Comparator 2 detects when
a user hovers over a sensor or approaches a sensor very slowly.
The PROXIMITY_RECAL_LVL bits (Address 0x003[7:0]) control
the sensitivity of Comparator 2. For example, if PROXIMITY_
RECAL_LVL is set to 75, the Proximity 2 signal is set when the
absolute difference between the fast filter average value and the
ambient value exceeds (75 × 16) LSB codes.
FF_SKIP_CNT
The proximity detection fast FIFO is used by the on-chip logic
to determine if proximity is detected . The fast FIFO expects to
receive samples from the converter at a set rate. FF_SKIP_CNT
(Register 0x002[3:0]) is the fast filter skip control, which used to
normalize the frequency of the samples going into the FIFO,
regardless of how many conversion stages are in a sequence. This
value determines which CDC samples are not used (skipped) in
the proximity detection fast FIFO.
Determining the FF_SKIP_CNT value is required only once during
the initial setup of the capacitance sensor interface. Table 13 shows
how FF_SKIP_CNT controls the update rate to the fast FIFO.
Recommended value for this setting, when using all eight
conversion stages on the AD7148, is
FF_SKIP_CNT = 0000 = no samples skipped.
8
7
N
= 0
PROXIMITY_DETECTION_RATE
REGISTER 0x003
PROXIMITY_RECAL_LVL
REGISTER 0x003
BANK 3 REGISTERS
P
R
OX
IM
ITY
2
SLOW_FILTER_UPDATE_LVL
REGISTER 0x003
BANK 3 REGISTERS
SW1
16
NOTES
1. SLOW_FILTER_EN IS SET AND SW1 IS CLOSED WHEN |STAGEx_SF_WORD0–STAGEx_SF_WORD 1| EXCEEDS THE VALUE PROGRAMMED IN THE SLOW_FILTER_UPDATE_LVL BITS
PROVIDING PROXIMITY IS NOT SET.
2. PROXIMITY 1 IS SET WHEN |STAGEx_FF_WORD0– STAGEx_FF_WORD3| EXCEEDS THE VALUE PROGRAMMED IN THE PROXIMITY_DETECTION_RATE BITS.
3. PROXIMITY 2 IS SET WHEN |AVERAGE–AMBIENT| EXCEEDS THE VALUE PROGRAMMED IN THE PROXIMITY_RECAL_LVL BITS.
4. DESCRIPTION OF COMPARATOR FUNCTIONS:
COMPARATOR 1: USED TO DETECT WHEN A USER IS APPROACHING OR LEAVING A SENSOR.
COMPARATOR 2: USED TO DETECT WHEN A USER IS HOVERING OVER A SENSOR OR APPROACHING A SENSOR VERY SLOWLY.
FP_PROXIMITY_RECAL
REGISTER 0x004
LP_PROXIMITY_RECAL
REGISTER 0x004
PROXIMITY
AMBIENT VALUE
STAGEx_SF_WORDx
CDC
O
UT
P
UT
CO
DE
TIME
SENSOR
CONTACT
STAGEx_SF_AMBIENT
BANK 3 REGISTERS
STAGEx_FF_AVG
BANK 3 REGISTERS
FP_PROXIMITY_CNT
REGISTER 0x002
LP_PROXIMITY_CNT
REGISTER 0x002
PROXIMITY 1
PROXIMITY TIMING
CONTROL LOGIC
WORD(N)
Σ
STAGEx_SF_WORD7
STAGEx_SF_WORD6
STAGEx_SF_WORD5
STAGEx_SF_WORD4
STAGEx_SF_WORD3
STAGEx_SF_WORD2
STAGEx_SF_WORD1
STAGEx_SF_WORD0
STAGEx_FF_WORDx
ALSO USED TO DETECT IF THE SENSOR AMBIENT LEVEL HAS CHANGED AS A RESULT OF USER INTERACTION.
FOR EXAMPLE, HUMIDITY OR DIRT LEFT BEHIND ON SENSOR.
COMPARATOR 3: USED TO ENABLE THE SLOW FILTER UPDATE RATE. THE SLOW FILTER IS UPDATED WHENSLOW_FILTER_EN IS SET AND PROXIMITY IS NOT SET.
CDC
STAGEx_FF_WORD0
STAGEx_FF_WORD1
STAGEx_FF_WORD2
STAGEx_FF_WORD3
STAGEx_FF_WORD4
STAGEx_FF_WORD5
STAGEx_FF_WORD6
STAGEx_FF_WORD7
WORD0 – WORD3
AVERAGE – AMBIENT
PROXIMITY
COMPARATOR 1
COMPARATOR 2
COMPARATOR 3
SLOW_FILTER_EN
WORD0 – CDC VALUE
Figure 30. Proximity Detection Logic
相關(guān)PDF資料
PDF描述
MS27467P9B98SA CONN PLUG 3POS STRAIGHT W/SCKT
VE-J1J-MX-F1 CONVERTER MOD DC/DC 36V 75W
MS27484T10B35PB CONN PLUG 13POS STRAIGHT W/PINS
SY100E416JI IC LINE RCVR QUINT DIFF 28-PLCC
MS27467T15F19PD CONN PLUG 19POS STRAIGHT W/PINS
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AD7148ACPZ-1REEL 功能描述:IC CAP-TO-DGTL CONV PROG 16LFCSP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 觸摸屏控制器 系列:- 標(biāo)準(zhǔn)包裝:96 系列:- 類型:- 觸摸面板接口:- 輸入數(shù)/鍵:- 分辨率（位）:- 評(píng)估套件:* 數(shù)據(jù)接口:- 數(shù)據(jù)速率/采樣率 (SPS，BPS):- 電壓基準(zhǔn):- 電源電壓:- 電流 - 電源:- 工作溫度:- 安裝類型:表面貼裝 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:16-TSSOP 包裝:帶卷 (TR)
AD7150 制造商:AD 制造商全稱:Analog Devices 功能描述:Ultra Low Power, 2 Channel, Capacitance Converter for Proximity Sensing
AD7150BRMZ 功能描述:IC CAP CONV 2CH ULT LP 10MSOP RoHS:是 類別:集成電路 (IC) >> 接口 - 傳感器和探測器接口 系列:- 其它有關(guān)文件:Automotive Product Guide 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:74 系列:- 類型:觸控式傳感器 輸入類型:數(shù)字 輸出類型:數(shù)字 接口:JTAG，串行 電流 - 電源:100µA 安裝類型:表面貼裝 封裝/外殼:20-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:20-TSSOP 包裝:管件
AD7150BRMZ-REEL 功能描述:IC CAP CONV 2CH ULT LP 10MSOP RoHS:是 類別:集成電路 (IC) >> 接口 - 傳感器和探測器接口 系列:- 其它有關(guān)文件:Automotive Product Guide 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:74 系列:- 類型:觸控式傳感器 輸入類型:數(shù)字 輸出類型:數(shù)字 接口:JTAG，串行 電流 - 電源:100µA 安裝類型:表面貼裝 封裝/外殼:20-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:20-TSSOP 包裝:管件
AD7151 制造商:AD 制造商全稱:Analog Devices 功能描述:Ultra-Low Power, 1-Channel, Capacitance Converter for Proximity Sensing
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購

我的聯(lián)系方式

*
*
*