TL/H/5587
ADC0811
8-Bit
Serial
I/O
A/D
Converter
With
11-Channel
Multiplexer
December 1994
ADC0811 8-Bit Serial I/O A/D Converter
With 11-Channel Multiplexer
General Description
The ADC0811 is an 8-Bit successive approximation A/D
converter with simultaneous serial I/O. The serial input con-
trols an analog multiplexer which selects from 11 input
channels or an internal half scale test voltage.
An input sample-and-hold is implemented by a capacitive
reference ladder and sampled data comparator. This allows
the input signal to vary during the conversion cycle.
Separate serial I/O and conversion clock inputs are provid-
ed to facilitate the interface to various microprocessors.
Features
Y
Separate asynchronous converter clock and serial data
I/O clock.
Y
11-Channel multiplexer with 4-Bit serial address logic.
Y
Built-in sample and hold function.
Y
Ratiometric or absolute voltage referencing.
Y
No zero or full-scale adjust required.
Y
Internally addressable test voltage.
Y
0V to 5V input range with single 5V power supply.
Y
TTL/MOS input/output compatible.
Y
0.3 standard width 20-pin dip or 20-pin molded chip
carrier
Key Specifications
Y
Resolution 8-Bits
Y
Total unadjusted error g (/2LSB and g 1LSB
Y
Single supply 5V
DC
Y
Low Power 15 mW
Y
Conversion Time 32 mS
Connection Diagrams
Dual-In-Line Package
TL/H/5587–1
Top View
Molded Chip Carrier (PCC) Package
TL/H/5587–2
Top View
Order Number ADC0811J,N,V
See NS Packages J20A, N20A, V20A
Use Ordering Information
Functional Diagram
TL/H/5587–3
C
1995 National Semiconductor Corporation RRD-B30M115/Printed in U. S. A.