ADC0808-N_14 Datasheet, PDF (1/20 Pages) Texas Instruments – ADC0808/ADC0809 8-Bit μP Compatible A/D Converters with 8-Channel Multiplexer

ADC0808-N, ADC0809-N
www.ti.com
SNAS535H – OCTOBER 1999 – REVISED MARCH 2013
ADC0808/ADC0809 8-Bit μP Compatible A/D Converters with 8-Channel Multiplexer
Check for Samples: ADC0808-N, ADC0809-N
FEATURES
1
•2 Easy Interface to All Microprocessors
• Operates Ratiometrically or with 5 V_DC or
Analog Span Adjusted Voltage Reference
• No Zero or Full-Scale Adjust Required
• 8-Channel Multiplexer with Address Logic
• 0V to V_CC Input Range
• Outputs meet TTL Voltage Level Specifications
• ADC0808 Equivalent to MM74C949
• ADC0809 Equivalent to MM74C949-1
KEY SPECIFICATIONS
• Resolution: 8 Bits
• Total Unadjusted Error: ±½ LSB and ±1 LSB
• Single Supply: 5 VDC
• Low Power: 15 mW
• Conversion Time: 100 μs
DESCRIPTION
The ADC0808, ADC0809 data acquisition component
is a monolithic CMOS device with an 8-bit analog-to-
digital converter, 8-channel multiplexer and
microprocessor compatible control logic. The 8-bit
A/D converter uses successive approximation as the
conversion technique. The converter features a high
impedance chopper stabilized comparator, a 256R
voltage divider with analog switch tree and a
successive 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, excellent 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 multiplexer with common output (sample/hold
port) see ADC0816 data sheet. (See AN-247
(Literature Number SNOA595) for more information.)
Block Diagram
Connection Diagrams
1
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2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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