- 您现在的位置：买卖IC网 > PDF目录9508 > AD7142ACPZ-1REEL (Analog Devices Inc)IC CAP-TO-DGTL CONV PROG 32LFCSP PDF资料下载
参数资料
| 型号： | AD7142ACPZ-1REEL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 9/73页 |
| 文件大小： | 0K |
| 描述： | IC CAP-TO-DGTL CONV PROG 32LFCSP |
| 标准包装： | 1 |
| 类型： | 电容数字转换器 |
| 分辨率（位）： | 16 b |
| 采样率（每秒）： | 250k |
| 数据接口： | 串行 |
| 电压电源： | 单电源 |
| 电源电压： | 2.6 V ~ 3.6 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-VFQFN 裸露焊盘，CSP |
| 供应商设备封装： | 32-LFCSP-VQ |
| 包装： | 标准包装 |
| 产品目录页面： | 781 (CN2011-ZH PDF) |
| 其它名称： | AD7142ACPZ-1REELDKR |
第1页第2页第3页第4页第5页第6页第7页第8页当前第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页
AD7142
Rev. A | Page 16 of 72
CIN0
CIN1
CIN2
CIN3
CIN4
CIN5
CIN6
CIN7
CIN8
CIN9
CIN10
CIN1 1
CIN12
CIN13
STAGE0
STAGE1
STAGE2
STAGE3
STAGE4
STAGE5
STAGE6
STAGE7
STAGE8
STAGE9
STAGE10
STAGE11
SW
IT
C
H
M
A
T
R
IX
Σ-Δ
16-BIT
ADC
C
O
NV
E
RS
IO
N
S
E
Q
UE
N
C
E
05
70
2-
01
2
Figure 24. CDC Conversion Stages
The number of required conversion stages depends completely
on the number of sensors attached to the AD7142. Figure 25
shows how many conversion stages are required for each sensor,
and how many inputs each sensor requires to the AD7142.
057
02-014
BUTTONS
STAGEX
8-ELEMENT SLIDER
CDC
STAGEX
+
–
CDC
STAGEX
+
–
CDC
STAGEX
+
–
CDC
STAGEX
+
–
CDC
STAGEX
+
–
CDC
STAGEX
+
–
CDC
STAGEX
+
–
CDC
STAGEX
+
–
AD7142 SEQUENCER
SRC
S2
S3
S1
CDC
+
–
CDC
+
–
Figure 25. Sequencer Setup for Sensors
A button sensor generally requires one sequencer stage;
however, it is possible to configure two button sensors to
operate differentially. Only one button from the pair can be
activated at a time; pressing both buttons together results in
neither button being activated. This configuration requires one
conversion stage, and is shown in Figure 25, B2 and B3.
A scroll bar or slider sensor requires eight stages. The result from
each stage is used by the host software to determine the user’s
position on the scroll bar. The algorithm that performs this process
is available from Analog Devices free of charge, on signing a
software license. Scroll wheels also require eight stages.
The 8-way switch is made from two pairs of differential buttons.
It, therefore, requires two conversion stages, one for each of the
differential button pairs. It also requires a stage to measure
whether the sensor is active. The buttons are orientated so that
one pair makes up the top and bottom portions of the 8-way
switch; the other pair makes up the left and right portions of the
8-way switch.
CDC CONVERSION SEQUENCE TIME
The time required for one complete measurement for all 12 stages
by the CDC is defined as the CDC conversion sequence time. The
SEQUENCE_STAGE_NUM register and DECIMATION register
determine the conversion time as listed in Table 10.
Table 10. CDC Conversion Times for Full Power Mode
Conversion Time (ms)
SEQUENCE_STAGE_NUM
DECIMATION
= 128
DECIMATION
= 256
0
1.536
3.072
1
3.072
6.144
2
4.608
9.216
3
6.144
12.288
4
7.68
15.36
5
9.216
18.432
6
10.752
21.504
7
12.288
24.576
8
13.824
27.648
9
15.36
30.72
10
16.896
33.792
11
18.432
36.864
For example, operating with a decimation rate of 128, if the
SEQUENCE_STAGE_NUM register is set to 5 for the
conversion of six stages in a sequence, the conversion sequence
time is 9.216 ms.
Full Power Mode CDC Conversion Sequence Time
The full power mode CDC conversion sequence time for all 12
stages is set by configuring the SEQUENCE_STAGE_NUM
register, and DECIMATION register as outlined in Table 10.
Figure 26 shows a simplified timing diagram of the full power
CDC conversion time. The full power mode CDC conversion
NOTES
1.
tCONV_FP = VALUE SET FROM TABLE 10.
tCONV_FP
CONVERSION
SEQUENCE N
CONVERSION
SEQUENCE N+1
CONVERSION
SEQUENCE N+2
CDC
CONVERSION
05
70
2-
01
5
Figure 26. Full Power Mode CDC Conversion Sequence Time
相关PDF资料 |
PDF描述 |
|---|---|
| V110A8M200BL2 | CONVERTER MOD DC/DC 8V 200W |
| CS3106A-24-67P | CONN PLUG 19POS STRAIGHT W/PINS |
| V110A8M200BL | CONVERTER MOD DC/DC 8V 200W |
| MS27497T18F35SC | CONN RCPT 66POS WALL MNT W/SCKT |
| V110A8M200B3 | CONVERTER MOD DC/DC 8V 200W |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AD7142ACPZ-1REEL1 | 制造商:AD 制造商全称:Analog Devices 功能描述:Programmable Controller for Capacitance Touch Sensors |
| AD7142ACPZ-500RL7 | 功能描述:IC CAP-TO-DGTL CONV PROG 32LFCSP RoHS:是 类别:集成电路 (IC) >> 数据采集 - ADCs/DAC - 专用型 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:50 系列:- 类型:数据采集系统（DAS） 分辨率（位）:16 b 采样率（每秒）:21.94k 数据接口:MICROWIRE?，QSPI?，串行，SPI? 电压电源:模拟和数字 电源电压:1.8 V ~ 3.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:40-WFQFN 裸露焊盘 供应商设备封装:40-TQFN-EP（6x6） 包装:托盘 |
| AD7142ACPZ-500RL71 | 制造商:AD 制造商全称:Analog Devices 功能描述:Programmable Controller for Capacitance Touch Sensors |
| AD7142ACPZ-REEL | 功能描述:IC CAP-TO-DGTL CONV PROG 32LFCSP RoHS:是 类别:集成电路 (IC) >> 数据采集 - ADCs/DAC - 专用型 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:50 系列:- 类型:数据采集系统（DAS） 分辨率（位）:16 b 采样率（每秒）:21.94k 数据接口:MICROWIRE?，QSPI?，串行，SPI? 电压电源:模拟和数字 电源电压:1.8 V ~ 3.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:40-WFQFN 裸露焊盘 供应商设备封装:40-TQFN-EP（6x6） 包装:托盘 |
| AD7142ACPZ-REEL1 | 制造商:AD 制造商全称:Analog Devices 功能描述:Programmable Controller for Capacitance Touch Sensors |
发布紧急采购，3分钟左右您将得到回复。