Rainbow-electronics ADC10664 Manual do Utilizador

Consulte online ou descarregue Manual do Utilizador para Sensores Rainbow-electronics ADC10664. Rainbow Electronics ADC10664 User Manual Manual do Utilizador

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TL/H/11192
ADC10662/ADC10664 10-Bit 360 ns A/D Converter
with Input Multiplexer and Sample/Hold
January 1995
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-in-
put CMOS analog-to-digital converters offering sub-micro-
second conversion times yet dissipating a maximum of only
235 mW. The ADC10662 and ADC10664 perform 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
signals at frequencies from dc to over 250 kHz can there-
fore 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
location or I/O port without the need for external interface
logic.
Features
Y
Built-in sample-and-hold
Y
Single
a
5V supply
Y
2- or 4-input multiplexer options
Y
No external clock required
Key Specifications
Y
Conversion time to 10 bits 360 ns typical,
466 ns max over temperature
Y
Sampling Rate 1.5 MHz (min)
Y
Low power dissipation 235 mW (max)
Y
Total harmonic distortion (50 kHz)
b
60 dB (max)
Y
No missing codes over temperature
Applications
Y
Digital signal processor front ends
Y
Instrumentation
Y
Disk drives
Y
Mobile telecommunications
Ordering Information
ADC10662
Industrial
Package
(
b
40
§
C
s
T
A
s
a
85
§
C)
ADC10662CIN N24A Molded DIP
ADC10662CIWM M24B Small Outline
ADC10664
Industrial
Package
(
b
40
§
C
s
T
A
s
a
85
§
C)
ADC10664CIN N28B Molded DIP
ADC10664CIWM M28B Small Outline
*U.S. Patent Number 4918449
TRI-STATE
É
is a registered trademark of National Semiconductor Corporation.
C
1995 National Semiconductor Corporation RRD-B30M75/Printed in U. S. A.
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Resumo do Conteúdo

Página 1 - Ordering Information

TL/H/11192ADC10662/ADC10664 10-Bit 360 ns A/D Converterwith Input Multiplexer and Sample/HoldJanuary 1995ADC10662/ADC10664 10-Bit 360 nsA/D Converter

Página 2 - Converter Characteristics

Functional DescriptionThe ADC10662 and ADC10664 digitize an analog input sig-nal to 10 bits accuracy by performing two lower-resolution‘‘flash’’ conve

Página 3 - AC Electrical Characteristics

Applications Information1.0 MODES OF OPERATIONThe ADC10662 and ADC10664 have two basic digital inter-face modes.Figure 1andFigure 2are timing diagrams

Página 4

Applications Information (Continued)TL/H/11192– 13FIGURE 4. Typical Connection. Note the multiple bypass capacitors on the reference and power supply

Página 5 - TL/H/11192– 1

Applications Information (Continued)ic characteristics such as signal-to-noise ratio (SNR) andtotal harmonic distortion (THD), are quantitative measur

Página 6 - TL/H/11192– 2

Physical Dimensions inches (millimeters)Order Number ADC10662CIWMNS Package Number M24B14

Página 7 - Timing Diagrams

Physical Dimensions inches (millimeters) (Continued)Order Number ADC10664CIWMNS Package Number M28BOrder Number ADC10662CINNS Package Number N24A15

Página 8 - Simplified Block Diagram

ADC10662/ADC10664 10-Bit 360 ns A/D Converterwith Input Multiplexer and Sample/HoldPhysical Dimensions inches (millimeters) (Continued)Order Number AD

Página 9 - Pin Descriptions

Absolute Maximum Ratings (Notes 1, 2)If Military/Aerospace specified devices are required,please contact the National Semiconductor SalesOffice/Distri

Página 10 - Functional Description

DC Electrical CharacteristicsThe following specifications apply for Vaea5V, VREF(a)e5V VREF(b)eGND, and Speed Adjust pin connected to groundthrough a

Página 11 - Applications Information

AC Electrical Characteristics (Continued)The following specifications apply for Vaea5V, tretfe20 ns, VREF(a)e5V, VREF(b)eGND, and Speed Adjust pinconn

Página 12 - TL/H/11192– 13

Typical Performance Characteristicsvs Reference VoltageZero (Offset) Errorvs Reference VoltageLinearity Errorvs TemperatureAnalog Supply Currentvs Tem

Página 13 - Figure 4

Typical Performance Characteristics (Continued)vs Signal FrequencySignal-to-NoiseaTHD Ratiovs Speed-Up ResistorLinearity ChangeSpeed-Up ResistorLinear

Página 14 - NS Package Number M24B

TRI-STATE Test Circuits and WaveformsTL/H/11192– 3TL/H/11192– 4TL/H/11192– 5TL/H/11192– 6Timing DiagramsTL/H/11192– 7FIGURE 1. Mode 1. The conversion

Página 15

Timing Diagrams (Continued)TL/H/11192– 8FIGURE 2. Mode 2 (RD Mode). The conversion time (tCRD) includes thesampling time and is determined by the inte

Página 16

Connection DiagramsDual-In-Line PackageTL/H/11192– 10Top ViewDual-In-Line PackageTL/H/11192– 11Top ViewPin DescriptionsDVCC,AVCCThese are the digital

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