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ADC10664 Datasheet

10-Bit 360 ns A/D Converter with Input Multiplexer and Sample/Hold

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June 1999
ADC10662/ADC10664
10-Bit 360 ns A/D Converter with Input Multiplexer and
Sample/Hold
General Description
Using an innovative, patented multistep* conversion tech-
nique, the 10-bit ADC10662 and ADC10664 are 2- and
4-input CMOS analog-to-digital converters offering
sub-microsecond conversion times yet dissipating a maxi-
mum of only 235 mW. The ADC10662 and ADC10664 per-
form 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.
In addition to standard static performance specifications
(Linearity, Full-Scale Error, etc.) dynamic performance (THD,
S/N) is guaranteed.
The analog input voltage to the ADC10662 and ADC10664 is
sampled and held by an internal sampling circuit. Input sig-
nals at frequencies from dc to over 250 kHz can therefore be
digitized accurately without the need for an external
sample-and-hold circuit.
The ADC10662 and ADC10664 include a “speed-up” pin.
Connecting an external resistor between this pin and ground
reduces the typical conversion time to as little as 360 ns.
For ease of interface to microprocessors, the ADC10662 and
ADC10664 have been designed to appear as a memory lo-
cation or I/O port without the need for external interface
logic.
Features
n Built-in sample-and-hold
n Single +5V supply
n 2- or 4-input multiplexer options
n No external clock required
Key Specifications
n Conversion time to 10 bits: 360 ns typical, 466 ns
max over temperature
n Sampling Rate: 1.5 MHz (min)
n Low power dissipation: 235 mW (max)
n Total harmonic distortion (50 kHz): −60 dB (max)
n No missing codes over temperature
Applications
n Digital signal processor front ends
n Instrumentation
n Disk drives
n Mobile telecommunications
Ordering Information
ADC10662
Industrial
(−40˚C TA +85˚C)
ADC10662CIWM
Package
M24B Small Outline
ADC10664
Industrial
(−40˚C TA +85˚C)
ADC10664CIWM
Package
M28B Small Outline
*U.S. Patent Number 4918449
TRI-STATE® is a registered trademark of National Semiconductor Corporation.
© 1999 National Semiconductor Corporation DS011192
www.national.com


National Semiconductor Electronic Components Datasheet

ADC10664 Datasheet

10-Bit 360 ns A/D Converter with Input Multiplexer and Sample/Hold

No Preview Available !

Simplified Block Diagram
*ADC10664 Only
Connection Diagrams
DS011192-9
Top View
DS011192-10
Top View
DS011192-11
www.national.com
2


Part Number ADC10664
Description 10-Bit 360 ns A/D Converter with Input Multiplexer and Sample/Hold
Maker National Semiconductor
Total Page 14 Pages
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