ADC1061
10-Bit High-Speed µP-Compatible A/D Converter with
Track/Hold Function
General Description
Using a modified half-flash conversion technique, the 10-bit
ADC1061 CMOS analog-to-digital converter offers very fast
conversion times yet dissipates a maximum of only 235 mW.
The ADC1061 performs a 10-bit conversion in two
lower-resolution “flashes”, thus yielding a fast A/D without
the cost, power dissipation, and other problems associated
with true flash approaches.
The analog input voltage to the ADC1061 is tracked and held
by an internal sampling circuit. Input signals at frequencies
from DC to greater than 160 kHz can therefore be digitized
accurately without the need for an external sample-and-hold
circuit.
For ease of interface to microprocessors, the ADC1061 has
been designed to appear as a memory location or I/O port
without the need for external interface logic.
Features
n 1.8 µs maximum conversion time to 10 bits
n Low power dissipation: 235 mW (maximum)
n Built-in track-and-hold
n No external clock required
n Single +5V supply
n No missing codes over temperature
Applications
n Waveform digitizers
n Disk drives
n Digital signal processor front ends
n Mobile telecommunications
Simplified Block and Connection Diagrams
TRI-STATE
®
is a registered trademark of National Semiconductor Corporation.
DS010559-2
June 1999
ADC1061
10-Bit
High-Speed
µP-Compatible
A/D
Converter
with
T
rack/Hold
Function
© 1999 National Semiconductor Corporation DS010559 www.national.com