- 您现在的位置：买卖IC网 > PDF目录9712 > AD7877ACBZ-REEL (Analog Devices Inc)IC CTRLR TOUCH SCREEN 25-WLCSP PDF资料下载
参数资料
| 型号： | AD7877ACBZ-REEL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 13/45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 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页当前第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
Data Sheet
AD7877
Rev. D | Page 19 of 44
AUXILIARY INPUTS
The AD7877 has three auxiliary analog inputs, AUX1 to AUX3.
These channels have a full-scale input range from 0 V to VREF.
The ADC channel addresses for AUX1 to AUX3 are 0011b,
0100b, and 0101b, and the results are stored in Register 10011b,
Register 10100b, and Register 10101b. These pins can also be
reconfigured as general-purpose logic inputs/outputs, as
described in the GPIO Configuration section.
LIMIT COMPARISON
The AUX1 measurement, the two battery measurements, and
the TEMP1 measurement can all be compared with high and
low limits, and an out-of-limit result that generates an alarm
output at the ALERT pin. The limits are stored in registers with
addresses from 00100b to 01011b. After a measurement from
any one of the four channels is converted, it is compared with
the corresponding high and low limits. An out-of-limit result
sets one of the status bits in the alert status/enable register. For
details on these and other registers, see the Register Maps and
Detailed Register Descriptions sections. For details on writing
and reading data, see the Serial Interface section.
As described in the Single Conversion Method section, the
temperature comparison is made using the result of the TEMP1
measurement, that is, the diode forward voltage. Because the
temperature coefficient of the diode is known but the actual
forward voltage can have a wide tolerance, it is not possible
to program the high and low limit registers with predeter-
mined values.
Instead, it is necessary to calibrate the temperature measure-
ment, calculate the TEMP1 readings at the high and low limit
temperatures, and then program those values into the limit
registers, as follows:
1. Calculate
LSB per degree = 2.1 mV/(VREF/4096).
2. Save the calibration reading DCAL at the calibration
temperature, TCAL.
3. Subtract TCAL from limit temperatures THIGH and TLOW
to get the difference in degrees between the limit
temperatures and the calibration temperature.
4. Multiply this value by LSB per degree to obtain the
value in LSBs.
5. Add these values to the digital value at the calibration
temperature to get the digital high and low limit values.
Example:
The internal 2.5 V reference is used.
1. THIGH = +65°C and TLOW = 10°C.
2. LSB per degree = 2.1 × 103/(2.5/4096) = 3.44.
3. DCAL = 983 decimal at 25°C.
4. DHIGH = (65 25) × 3.44 + 983 = 845.
5. DLOW = (10 25) × 3.44 + 983 = 1103.
相关PDF资料 |
PDF描述 |
|---|---|
| MS27497E24F35S | CONN RCPT 128POS WALL MNT W/SCKT |
| MS3106R32-17PY | CONN PLUG 4POS STRAIGHT W/PINS |
| VI-24D-IW-B1 | CONVERTER MOD DC/DC 85V 100W |
| VI-24B-IW-B1 | CONVERTER MOD DC/DC 95V 100W |
| VE-J54-MX-F1 | CONVERTER MOD DC/DC 48V 75W |
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 |
发布紧急采购，3分钟左右您将得到回复。