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ADS7852 参数 Datasheet PDF下载

ADS7852图片预览
型号: ADS7852
PDF下载: 下载PDF文件 查看货源
内容描述: 12位, 8通道,并行输出模拟数字转换器 [12-Bit, 8-Channel, Parallel Output ANALOG-TO-DIGITAL CONVERTER]
分类和应用: 转换器
文件页数/大小: 13 页 / 150 K
品牌: BB [ BURR-BROWN CORPORATION ]
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PIN ASSIGNMENTS  
PIN CONFIGURATION  
PIN  
1
NAME  
AIN0  
AIN1  
AIN2  
AIN3  
AIN4  
AIN5  
AIN6  
AIN7  
AGND  
VREF  
DESCRIPTION  
Top View  
TQFP  
Analog Input Channel 0  
Analog Input Channel 1  
Analog Input Channel 2  
Analog Input Channel 3  
Analog Input Channel 4  
Analog Input Channel 5  
Analog Input Channel 6  
Analog Input Channel 7  
Analog Ground, GND = 0V  
2
3
4
5
6
7
8
DB2  
DB3  
DB4  
DB5  
DB6  
DB7  
DB8  
DB9  
AIN0  
AIN1  
AIN2  
AIN3  
AIN4  
AIN5  
AIN6  
AIN7  
1
2
3
4
5
6
7
8
24  
23  
22  
21  
20  
19  
18  
17  
9
10  
Voltage Reference Input and Output. See  
Specification Table for ranges. Decouple to  
ground with a 0.1µF ceramic capacitor and  
a 2.2µF tantalum capacitor.  
ADS7852Y  
11  
12  
DGND  
A2  
Digital Ground, GND = 0V  
Channel Address. See Channel Selection  
Table for details.  
13  
14  
A1  
A0  
Channel Address. See Channel Selection  
Table for details.  
Channel Address. See Channel Selection  
Table for details.  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
DB11  
DB10  
DB9  
DB8  
DB7  
DB6  
DB5  
DB4  
DB3  
DB2  
DB1  
DB0  
WR  
Data Bit 11 (MSB)  
Data Bit 10  
Data Bit 9  
Data Bit 8  
Data Bit 7  
Data Bit 6  
Data Bit 5  
Data Bit 4  
Data Bit 3  
ABSOLUTE MAXIMUM RATINGS(1)  
Data Bit 2  
Data Bit 1  
Analog Inputs to AGND, Any Channel Input .............. –0.3V to (VD + 0.3V)  
REFIN ......................................................................... –0.3V to (VD + 0.3V)  
Digital Inputs to DGND .............................................. –0.3V to (VD + 0.3V)  
Ground Voltage Differences: AGND, DGND..................................... ±0.3V  
+VSS to AGND ..........................................................................0.3V to 6V  
Power Dissipation .......................................................................... 325mW  
Maximum Junction Temperature ................................................... +150°C  
Operating Temperature Range ......................................... –40°C to +85°C  
Storage Temperature Range .......................................... –65°C to +150°C  
Lead Temperature (soldering, 10s) ............................................... +300°C  
Data Bit 0 (LSB)  
Write Input. Active LOW. Use to start a  
new conversion and to select an analog  
channel via address inputs A0, A1 and A2  
in combination with CS.  
28  
29  
30  
BUSY  
CLK  
RD  
BUSY output goes LOW and stays LOW  
during a conversion. BUSY rises when a  
conversion is complete.  
External Clock Input. The clock speed  
determines the conversion rate by the  
equation: fCLK = 16 • fSAMPLE  
NOTE: (1) Stresses above those listed under “Absolute Maximum Ratings” may  
cause permanent damage to the device. Exposure to absolute maximum condi-  
tions for extended periods may affect device reliability.  
.
Read Input. Active LOW. Use to read the  
data outputs in combination with CS. Also  
use (in conjunction with A0 or A1) to place  
device in power-down mode.  
ELECTROSTATIC  
DISCHARGE SENSITIVITY  
Electrostatic discharge can cause damage ranging from per-  
formance degradation to complete device failure. Burr-  
Brown Corporation recommends that all integrated circuits  
be handled and stored using appropriate ESD protection  
methods.  
31  
32  
CS  
Chip Select Input. Active LOW. The  
combination of CS taken LOW and WR  
taken LOW initiates a new conversion and  
places the outputs in tri-state mode.  
VSS  
Voltage Supply Input. Nominally +5V.  
Decouple to ground with a 0.1µF ceramic  
capacitor and a 10µF tantalum capacitor.  
ESD damage can range from subtle performance degrada-  
tion to complete device failure. Precision integrated circuits  
may be more susceptible to damage because very small  
parametric changes could cause the device not to meet  
published specifications.  
®
3
ADS7852