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ADC0809CCN/NOPB 参数 Datasheet PDF下载

ADC0809CCN/NOPB图片预览
型号: ADC0809CCN/NOPB
PDF下载: 下载PDF文件 查看货源
内容描述: [IC 8-CH 8-BIT SUCCESSIVE APPROXIMATION ADC, PARALLEL ACCESS, PDIP28, PLASTIC, DIP-28, Analog to Digital Converter]
分类和应用: 转换器
文件页数/大小: 14 页 / 348 K
品牌: NSC [ NATIONAL SEMICONDUCTOR ]
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ADC0808/ADC0809 8-Bit µP Compatible A/D Converters with 8-Channel Multiplexer
November 1995
ADC0808/ADC0809
8-Bit µP Compatible A/D Converters with 8-Channel
Multiplexer
General Description
The ADC0808, ADC0809 data acquisition component is a
monolithic CMOS device with an 8-bit analog-to-digital con-
verter, 8-channel multiplexer and microprocessor compatible
control logic. The 8-bit A/D converter uses successive ap-
proximation as the conversion technique. The converter fea-
tures a high impedance chopper stabilized comparator, a
256R voltage divider with analog switch tree and a succes-
sive approximation register. The 8-channel multiplexer can
directly access any of 8-single-ended analog signals.
The device eliminates the need for external zero and
full-scale adjustments. Easy interfacing to microprocessors
is provided by the latched and decoded multiplexer address
inputs and latched TTL TRI-STATE
®
outputs.
The design of the ADC0808, ADC0809 has been optimized
by incorporating the most desirable aspects of several A/D
conversion techniques. The ADC0808, ADC0809 offers high
speed, high accuracy, minimal temperature dependence, ex-
cellent long-term accuracy and repeatability, and consumes
minimal power. These features make this device ideally
suited to applications from process and machine control to
consumer and automotive applications. For 16-channel mul-
tiplexer with common output (sample/hold port) see
ADC0816 data sheet. (See AN-247 for more information.)
Features
n
Easy interface to all microprocessors
n
Operates ratiometrically or with 5 V
DC
or analog span
adjusted voltage reference
n
No zero or full-scale adjust required
n
8-channel multiplexer with address logic
n
0V to 5V input range with single 5V power supply
n
Outputs meet TTL voltage level specifications
n
Standard hermetic or molded 28-pin DIP package
n
28-pin molded chip carrier package
n
ADC0808 equivalent to MM74C949
n
ADC0809 equivalent to MM74C949-1
Key Specifications
n
n
n
n
n
Resolution: 8 Bits
Total Unadjusted Error:
±
1
2
LSB and
±
1 LSB
Single Supply: 5 V
DC
Low Power: 15 mW
Conversion Time: 100 µs
TRI-STATE
®
is a registered trademark of National Semiconductor Corp.
© 1997 National Semiconductor Corporation
DS005672
www.national.com