Rainbow-electronics ADC08200 Manual de usuario

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ADC08200
8-Bit, 20 MSPS to 200 MSPS, 1.05 mW/MSPS A/D
Converter
General Description
The ADC08200 is a low-power, 8-bit, monolithic analog-to-
digital converter with an on-chip track-and-hold circuit. Opti-
mized for low cost, low power, small size and ease of use,
this product operates at conversion rates up to 230 MSPS
while consuming just 1.05 mW per MHz of clock frequency,
or 210 mW at 200 MSPS. Raising the PD pin puts the
ADC08200 into a Power Down mode where it consumes
about 1 mW.
The unique architecture achieves 7.3 Effective Bits with
50 MHz input frequency. The ADC08200 is resistant to
latch-up and the outputs are short-circuit proof. The top and
bottom of the ADC08200’s reference ladder are available for
connections, enabling a wide range of input possibilities. The
digital outputs are TTL/CMOS compatible with a separate
output power supply pin to support interfacing with 3V or
2.5V logic. The digital inputs (CLK and PD) are TTL/CMOS
compatible.
The ADC08200 is offered in a 24-lead plastic package
(TSSOP) and is specified over the industrial temperature
range of −40˚C to +85˚C. An evaluation board is available to
assist in the easy evaluation of the ADC08200.
Features
n Single-ended input
n Internal sample-and-hold function
n Low voltage (single +3V) operation
n Small package
n Power-down feature
Key Specifications
n Resolution 8 Bits
n Maximum sampling frequency 200 MSPS (min)
n DNL
±
0.4 LSB (typ)
n ENOB (f
IN
= 50 MHz) 7.3 bits (typ)
n THD (f
IN
= 50 MHz) 61 dB (typ)
n Power Consumption
— Operating 1.05 mW/MSPS (typ)
— Power Down 1 mW (typ)
Applications
n Flat panel displays
n Projection systems
n Set-top boxes
n Battery-powered instruments
n Communications
n Medical imaging
n Astronomy
Pin Configuration
20017901
July 2004
ADC08200 8-Bit, 20 MSPS to 200 MSPS, 1.05 mW/MSPS A/D Converter
© 2004 National Semiconductor Corporation DS200179 www.national.com
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Indice de contenidos

Pagina 1 - Converter

ADC082008-Bit, 20 MSPS to 200 MSPS, 1.05 mW/MSPS A/DConverterGeneral DescriptionThe ADC08200 is a low-power, 8-bit, monolithic analog-to-digital conve

Pagina 2 - Block Diagram

Typical Performance Characteristics VA=VDR= 3V, fCLK= 200 MHz, fIN= 50 MHz, unlessotherwise stated (Continued)SNR vs. Sample Rate SNR vs. Input Freque

Pagina 3

Typical Performance Characteristics VA=VDR= 3V, fCLK= 200 MHz, fIN= 50 MHz, unlessotherwise stated (Continued)Distortion vs. Input Frequency Distortio

Pagina 4 - Package Thermal Resistance

Typical Performance Characteristics VA=VDR= 3V, fCLK= 200 MHz, fIN= 50 MHz, unlessotherwise stated (Continued)SINAD/ENOB vs. Clock Duty Cycle Power Co

Pagina 5

Functional DescriptionThe ADC08200 uses a new, unique architecture thatachieves over 7 effective bits at input frequencies up to andbeyond 100 MHz.The

Pagina 6

Applications Information (Continued)2.0 THE ANALOG INPUTThe analog input of the ADC08200 is a switch followed by anintegrator. The input capacitance c

Pagina 7 - Specification Definitions

Applications Information (Continued)3.0 POWER SUPPLY CONSIDERATIONSA/D converters draw sufficient transient current to corrupttheir own power supplies

Pagina 8 - Timing Diagram

Applications Information (Continued)The CLOCK line should be series terminated at the clocksource in the characteristic impedance of that line if the

Pagina 9

Applications Information (Continued)the supply pins. Exceeding these limits on even a transientbasis may cause faulty or erratic operation. It is not

Pagina 10

Physical Dimensions inches (millimeters)unless otherwise notedNOTES: UNLESS OTHERWISE SPECIFIEDREFERENCE JEDEC REGISTRATION mo-153, VARIATION AD, DATE

Pagina 11

Ordering InformationOrder Number (−40˚C ≤ TA≤ +85˚C) PackageADC08200CIMT TSSOPADC08200CIMTX TSSOP (tape and reel)ADC08200EVAL Evaluation BoardBlock Di

Pagina 12

Pin Descriptions and Equivalent Circuits (Continued)Pin No. Symbol Equivalent Circuit Description23 PDPower Down input. When this pin is high, the con

Pagina 13 - Applications Information

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

Pagina 14

Converter Electrical Characteristics (Continued)The following specifications apply for VA=VDR= +3.0VDC,VRT= +1.9V, VRB= 0.3V, CL= 5 pF, fCLK= 200 MHz

Pagina 15

Converter Electrical Characteristics (Continued)The following specifications apply for VA=VDR= +3.0VDC,VRT= +1.9V, VRB= 0.3V, CL= 5 pF, fCLK= 200 MHz

Pagina 16

Specification DefinitionsAPERTURE (SAMPLING) DELAY is that time required afterthe rise of the clock input for the sampling switch to open.The Sample/H

Pagina 17

Timing DiagramTypical Performance CharacteristicsVA=VDR= 3V, fCLK= 200 MHz, fIN= 50 MHz, unless other-wise statedINL INL vs. Temperature20017908200179

Pagina 18 - NS Package Number MTC24

Typical Performance Characteristics VA=VDR= 3V, fCLK= 200 MHz, fIN= 50 MHz, unlessotherwise stated (Continued)DNL DNL vs. Temperature2001790920017917D

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