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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
DESCRIPTION


The ADC0808, ADC0809 data acquisition component
is a monolithic CMOS device with an 8-bit analog-todigital
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.
1
2






Easy Interface to All Microprocessors
Operates Ratiometrically or with 5 VDC or
Analog Span Adjusted Voltage Reference
No Zero or Full-Scale Adjust Required
8-Channel Multiplexer with Address Logic
0V to VCC 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
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 16channel 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
2
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
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.
Copyright © 1999–2013, Texas Instruments Incorporated
ADC0808-N, ADC0809-N
SNAS535H – OCTOBER 1999 – REVISED MARCH 2013
Figure 1. PDIP Package
See Package N0028E
www.ti.com
Figure 2. PLCC
Package
See Package FN0028A
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
Absolute Maximum Ratings (1) (2) (3)
Supply Voltage (VCC) (4)
6.5V
−0.3V to (VCC+0.3V)