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ADC0803

更新时间： 2024-02-19 18:35:15
品牌 Logo 应用领域
英特矽尔 - INTERSIL 转换器微处理器
页数 文件大小 规格书
17页 572K
描述
8-Bit, Microprocessor-Compatible, A/D Converters

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ADC0803 数据手册

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ADC0803, ADC0804  
®
Data Sheet  
August 2002  
FN3094.4  
8-Bit, Microprocessor-Compatible, A/D  
Converters  
The ADC080X family are CMOS 8-Bit, successive-  
approximation A/D converters which use a modified  
potentiometric ladder and are designed to operate with the  
8080A control bus via three-state outputs. These converters  
appear to the processor as memory locations or I/O ports,  
and hence no interfacing logic is required.  
Features  
• 80C48 and 80C80/85 Bus Compatible - No Interfacing  
Logic Required  
• Conversion Time . . . . . . . . . . . . . . . . . . . . . . . . . . <100µs  
• Easy Interface to Most Microprocessors  
• Will Operate in a “Stand Alone” Mode  
• Differential Analog Voltage Inputs  
The differential analog voltage input has good common-  
mode-rejection and permits offsetting the analog zero-input-  
voltage value. In addition, the voltage reference input can be  
adjusted to allow encoding any smaller analog voltage span  
to the full 8 bits of resolution.  
• Works with Bandgap Voltage References  
• TTL Compatible Inputs and Outputs  
• On-Chip Clock Generator  
• Analog Voltage Input Range  
(Single + 5V Supply) . . . . . . . . . . . . . . . . . . . . . . 0V to 5V  
Typical Application Schematic  
• No Zero-Adjust Required  
• 80C48 and 80C80/85 Bus Compatible - No Interfacing  
Logic Required  
1
2
3
20  
19  
4
CS  
RD  
WR  
INTR  
DB  
DB  
DB  
DB  
DB  
DB  
DB  
DB  
V+  
CLK R  
CLK IN  
+5V  
150pF  
Pinout  
10K  
ADC0803, ADC0804  
(PDIP)  
5
11  
12  
13  
14  
15  
16  
17  
18  
7
6
5
4
3
2
1
0
TOP VIEW  
ANY  
µPROCESSOR  
6
7
8
9
10  
1
2
3
4
5
6
7
8
9
V+ OR V  
V
V
(+)  
(-)  
20  
CS  
RD  
IN  
IN  
REF  
DIFF  
INPUTS  
19  
18  
CLK R  
DB  
AGND  
WR  
0 (LSB)  
V
/2  
V
/2  
REF  
REF  
17 DB  
16 DB  
15 DB  
14 DB  
CLK IN  
INTR  
1
DGND  
2
V
(+)  
(-)  
IN  
3
V
IN  
4
8-BIT RESOLUTION  
OVER ANY  
13  
12  
DB  
DB  
AGND  
/2  
5
V
DESIRED  
REF  
6
ANALOG INPUT  
VOLTAGE RANGE  
DGND 10  
11 DB  
7 (MSB)  
Ordering Information  
o
PART NUMBER  
ERROR  
EXTERNAL CONDITIONS  
TEMP. RANGE ( C)  
PACKAGE  
PKG. NO  
E20.3  
1
ADC0803LCN  
± / LSB  
V
/2 Adjusted for Correct Full Scale  
REF  
0 to 70  
20 Ld PDIP  
2
Reading  
ADC0804LCN  
±1 LSB  
V
/2 = 2.500V  
REF  
(No Adjustments)  
0 to 70  
20 Ld PDIP  
E20.3  
DC  
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.  
1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc.  
Copyright © Intersil Americas Inc. 2002. All Rights Reserved  
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