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AD7746

更新时间: 2024-02-20 05:37:01
品牌 Logo 应用领域
亚德诺 - ADI 转换器传感器温度传感器
页数 文件大小 规格书
28页 780K
描述
24-Bit Capacitance-to-Digital Converter with Temperature Sensor

AD7746 技术参数

是否无铅: 含铅是否Rohs认证: 符合
生命周期:Active针数:16
Reach Compliance Code:compliantECCN代码:EAR99
HTS代码:8542.39.00.01风险等级:5.31
最大精度(摄氏度):2 Cel主体宽度:4.4 mm
主体高度:1.2 mm主体长度或直径:5 mm
JESD-609代码:e3安装特点:SURFACE MOUNT
位数:24最大工作电流:0.7 mA
最高工作温度:125 °C最低工作温度:-40 °C
输出接口类型:2-WIRE INTERFACE封装形状/形式:RECTANGULAR
传感器/换能器类型:TEMPERATURE SENSOR,SWITCH/DIGITAL OUTPUT,SERIAL最大供电电压:5.25 V
最小供电电压:2.7 V表面贴装:YES
端子面层:Matte Tin (Sn)端接类型:SOLDER

AD7746 数据手册

 浏览型号AD7746的Datasheet PDF文件第4页浏览型号AD7746的Datasheet PDF文件第5页浏览型号AD7746的Datasheet PDF文件第6页浏览型号AD7746的Datasheet PDF文件第8页浏览型号AD7746的Datasheet PDF文件第9页浏览型号AD7746的Datasheet PDF文件第10页 
AD7745/AD7746  
PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS  
1
2
3
4
5
6
7
8
16  
15  
14  
13  
12  
11  
10  
9
1
2
3
4
5
6
7
8
16  
15  
14  
13  
12  
11  
10  
9
SCL  
SDA  
NC  
SCL  
SDA  
NC  
RDY  
RDY  
EXCA  
EXCA  
VDD  
GND  
VIN(–)  
VIN(+)  
VDD  
GND  
VIN(–)  
VIN(+)  
AD7745  
TOP VIEW  
(Not to Scale)  
AD7746  
TOP VIEW  
(Not to Scale)  
EXCB  
REFIN(+)  
REFIN(–)  
CIN1(–)  
EXCB  
REFIN(+)  
REFIN(–)  
CIN1(–)  
NC  
NC  
CIN2(–)  
CIN2(+)  
CIN1(+)  
CIN1(+)  
NC = NO CONNECT  
NC = NO CONNECT  
Figure 4. AD7745 Pin Configuration (16-Lead TSSOP)  
Figure 5. AD7746 Pin Configuration (16-Lead TSSOP)  
Table 4. Pin Function Descriptions  
Pin No.  
Mnemonic  
Description  
1
SCL  
Serial Interface Clock Input. Connects to the master clock line. Requires pull-up resistor if not already  
provided in the system.  
2
RDY  
Logic Output. A falling edge on this output indicates that a conversion on enabled channel(s) has been  
finished and the new data is available. Alternatively, the status register can be read via the 2-wire serial  
interface and the relevant bit(s) decoded to query the finished conversion. If not used, this pin should be left  
as an open circuit.  
3, ±  
5, 9  
EXCA, EXCB  
CDC Excitation Outputs. The measured capacitance is connected between one of the EXC pins and one of the  
CIN pins. If not used, these pins should be left as an open circuit.  
REFIN(+),  
REFIN(–)  
Differential Voltage Reference Input for the Voltage Channel (ADC). Alternatively, the on-chip internal  
reference can be used for the voltage channel. These reference input pins are not used for conversion on  
capacitive channel(s) (CDC). If not used, these pins can be left as an open circuit or connected to GND.  
7
8
CIN1(–)  
CIN1(+)  
CDC Negative Capacitive Input in Differential Mode. This pin is internally disconnected in single-ended CDC  
configuration. If not used, this pin can be left as an open circuit or connected to GND.  
CDC Capacitive Input (in Single-Ended Mode) or Positive Capacitive Input (in Differential Mode). The  
measured capacitance is connected between one of the EXC pins and one of the CIN pins. If not used, this pin  
can be left as an open circuit or connected to GND.  
ꢀ, 10  
NC  
Not Connected. This pin should be left as an open circuit.  
(AD77±5)  
CIN2(+)  
CIN2(–)  
CDC Second Capacitive Input (in Single-Ended Mode) or Positive Capacitive Input (in Differential Mode). If not  
used, this pin can be left open circuit or connected to GND.  
(AD77±9)  
10  
(AD77±9)  
CDC Negative Capacitive Input in Differential Mode. This pin is internally disconnected in a single-ended CDC  
configuration. If not used, this pin can be left as an open circuit or connected to GND.  
11, 12  
VIN(+), VIN(–) Differential Voltage Input for the Voltage Channel (ADC). These pins are also used to connect an external  
temperature sensing diode. If not used, these pins can be left as an open circuit or connected to GND.  
13  
1±  
GND  
VDD  
Ground Pin.  
Power Supply Voltage. This pin should be decoupled to GND, using a low impedance capacitor, for example  
in combination with a 10 µF tantalum and a 0.1 µF multilayer ceramic.  
15  
19  
NC  
Not Connected. This pin should be left as an open circuit.  
SDA  
Serial Interface Bidirectional Data. Connects to the master data line. Requires a pull-up resistor if not provided  
elsewhere in the system.  
Rev. 0| Page 7 of 28  
 

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