Rainbow-electronics ADC1061 Bedienungsanleitung

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TL/H/10559
ADC1061 10-Bit High-Speed mP-Compatible A/D Converter with Track/Hold Function
December 1994
ADC1061 10-Bit High-Speed mP-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 frequen-
cies from DC to greater than 160 kHz can therefore be digi-
tized 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
Y
1.8 ms maximum conversion time to 10 bits
Y
Low power dissipation: 235 mW (maximum)
Y
Built-in track-and-hold
Y
No external clock required
Y
Single
a
5V supply
Y
No missing codes over temperature
Applications
Y
Waveform digitizers
Y
Disk drives
Y
Digital signal processor front ends
Y
Mobile telecommunications
Simplified Block and Connection Diagrams
TL/H/105592
Dual-In-Line Package
TL/H/105591
Top View
Order Number
ADC1061CIJ, ADC1061CIN,
ADC1061CIWM or ADC1061CMJ
See NS Package J20A,
M20B or N20A
Ordering Information
Industrial (
b
40
§
C
s
T
A
s
85
§
C) Package
ADC1061CIJ J20A
ADC1061CIN N20A
ADC1061CIWM M20B
Military (
b
55
§
C
s
T
A
s
125
§
C) Package
ADC1061CMJ J20A
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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Inhaltsverzeichnis

Seite 1 - Ordering Information

TL/H/10559ADC1061 10-Bit High-Speed mP-Compatible A/D Converter with Track/Hold FunctionDecember 1994ADC1061 10-Bit High-Speed mP-CompatibleA/D Conver

Seite 2 - Converter Characteristics

6.0 Layout and GroundingIn order to ensure fast, accurate conversions from theADC1061, it is necessary to use appropriate circuit boardlayout techniqu

Seite 3 - AC Electrical Characteristics

Physical Dimensions inches (millimeters)Order Number ADC1061CIJ or ADC1061CMJNS Package Number J20AOrder Number ADC1061CIWMNS Package Number M20B11

Seite 4 - TL/H/10559–3

ADC1061 10-Bit High-Speed mP-Compatible A/D Converter with Track/Hold FunctionPhysical Dimensions inches (millimeters) (Continued) Lit.Ý101004Order Nu

Seite 5 - Timing Diagrams

Absolute Maximum Ratings (Notes1&2)If Military/Aerospace specified devices are required,please contact the National Semiconductor SalesOffice/Dist

Seite 6 - Pin Descriptions

DC Electrical CharacteristicsThe following specifications apply for Vaea5V, VREF(a)e5V, and VREF(b)eGND unless otherwise specified. Boldfacelimits app

Seite 7 - Functional Description

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

Seite 8 - 1.0 Modes of Operation

Timing DiagramsTL/H/10559–7FIGURE 1. Mode 1. The conversion time (tCONV) is determined by the internal timer.TL/H/10559–8FIGURE 2. Mode 2 (RD Mode). T

Seite 9 - 4.0 Inherent Sample-and-Hold

Typical Performance CharacteristicsZero (Offset) Errorvs Reference VoltageTL/H/10559–9Linearity Error vsReference VoltageTL/H/10559–10Mode 1 Conversio

Seite 10 - 6.0 Layout and Grounding

Pin Descriptions (Continued)Symbol FunctionGND (10) This is the power supply ground pin. Theground pin should be connected to a‘‘clean’’ ground refere

Seite 11

Functional Description (Continued)The remaining four LSBs may now be determined using thesame sixteen comparators that were used for the first flashco

Seite 12

2.0 Reference ConsiderationsThe ADC1061 has two reference inputs. These inputs,VREFaand VREFb, are fully differential and define the zeroto full-scale

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