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ADC0808 Datasheet(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part No. ADC0808
Description  8-Bit uP Compatible A/D Converters with 8-Channel Multiplexer
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Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com

ADC0808 Datasheet(HTML) 1 Page - National Semiconductor (TI)

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8-Bit µP Compatible A/D Converters with 8-Channel
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-
ADC0816 data sheet. (See AN-247 for more information.)
n Easy interface to all microprocessors
n Operates ratiometrically or with 5 VDC 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 Resolution
8 Bits
n Total Unadjusted Error
±12 LSB and ±1 LSB
n Single Supply
5 V
n Low Power
15 mW
n Conversion Time
100 µs
Block Diagram
TRI-STATE® is a registered trademark of National Semiconductor Corp.
See Ordering
October 1999
© 1999 National Semiconductor Corporation

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