Rainbow-electronics ADC08351 Manual do Utilizador

Consulte online ou descarregue Manual do Utilizador para Sensores Rainbow-electronics ADC08351. Rainbow Electronics ADC08351 User Manual Manual do Utilizador

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ADC08351
8-Bit, 42 MSPS, 40 mW A/D Converter
General Description
The ADC08351 is an easy to use low power, low cost, small
size, 42 MSPS analog-to-digital converter that digitizes sig-
nals to 8 bits. The ADC08351 uses an unique architecture
that achieves 7.2 Effective Bits with a 4.4 MHz input and
42 MHz clock frequency and 6.8 Effective Bits with a 21 MHz
input and 42 MHz clock frequency. Output formatting is
straight binary coding.
To minimize system cost and power consumption, the
ADC08351 requires minimal external components and in-
cludes input biasing to allow optional a.c. input signal cou-
pling. The user need only provide a +3V supply and a clock.
Many applications require no separate reference or driver
components.
The excellent dc and ac characteristics of this device, to-
gether with its low power consumption and +3V single supply
operation, make it ideally suited for many video and imaging
applications, including use in portable equipment. Total
power consumption is reduced to less than 7 mW in the
power-down mode. Furthermore, the ADC08351 is resistant
to latch-up and the outputs are short-circuit proof.
Fabricated on a 0.35 micron CMOS process, the ADC08351
is offered in TSSOP and LLP (a molded lead frame-based
chip-scale package), and is designed to operate over the
industrial temperature range of −40˚C to +85˚C.
Features
n Low Input Capacitance
n Internal Sample-and-Hold Function
n Single +3V Operation
n Power Down Feature
n TRI-STATE Outputs
Key Specifications
j
Resolution 8 Bits
j
Maximum Sampling Frequency 42 MSPS (min)
j
ENOB
@
f
CLK
= 42 MHz, f
IN
= 4.4 MHz 7.2 Bits (typ)
j
Guaranteed No Missing Codes
j
Power Consumption 40 mW (typ); 48 mW (max)
(Excluding Reference Current)
Applications
n Video Digitization
n Digital Still Cameras
n Set Top Boxes
n Digital Camcorders
n Communications
n Medical Imaging
n Personal Computer Video
n CCD Imaging
n Electro-Optics
Pin Configuration
20-Pin TSSOP 24-Pin LLP (CSP)
10089501
Top View
10089534
Bottom View
November 2003
ADC08351 8-Bit, 42 MSPS, 40 mW A/D Converter
© 2003 National Semiconductor Corporation DS100895 www.national.com
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Resumo do Conteúdo

Página 1 - ADC08351

ADC083518-Bit, 42 MSPS, 40 mW A/D ConverterGeneral DescriptionThe ADC08351 is an easy to use low power, low cost, smallsize, 42 MSPS analog-to-digital

Página 2 - ADC08351 Block Diagram

Applications Information (All schematicpin numbers refer to the TSSOP.) (Continued)CLC440, LM6152, LM6154, LM6181 and LM6182 are gooddevices for drivi

Página 3

Applications Information (All schematic pin numbers refer to the TSSOP.) (Continued)10089525FIGURE 3. Layout examples showing separate analog and digi

Página 4

Applications Information (All schematicpin numbers refer to the TSSOP.) (Continued)Generally, analog and digital lines should cross each other at90 de

Página 5

Applications Information (All schematic pin numbers refer to the TSSOP.) (Continued)10089527FIGURE 5. AC Coupled Circuit for a Low Impedance Source Lo

Página 6

Applications Information (All schematic pin numbers refer to the TSSOP.) (Continued)ACCURATELY EVALUATING THE ADCIf a signal that is spectrally impure

Página 7

Applications Information (All schematicpin numbers refer to the TSSOP.) (Continued)7.0 COMMON APPLICATION PITFALLSDriving the inputs (analog or digita

Página 8 - Specification Definitions

Physical Dimensions inches (millimeters) unless otherwise noted20-Lead TSSOPOrder Number ADC08351CIMTCNS Package Number MTC2024-Lead Package LLPOrder

Página 9 - Functional Description

NotesLIFE SUPPORT POLICYNATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORTDEVICES OR SYSTEMS WITHOUT THE EXPRESS WR

Página 10

Ordering InformationADC08351CIMTC TSSOPADC08351CIMTCX TSSOP (tape & reel)ADC08351CILQ LLP (tape & reel - 1, 000 units)ADC08351CILQX LLP (tape

Página 11

Pin Descriptions and Equivalent Circuits (LLP pins in parentheses) (Continued)PinNo.Symbol Equivalent Circuit Description3 thru10(1 thru8)D0–D7Convers

Página 12

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

Página 13

Converter Electrical Characteristics (Continued)The following specifications apply for VA=VD= +3.0 VDC,VREF= 2.4V, VIN= 1.63 VP-P, OE = 0V, CL= 20 pF,

Página 14

Note 7: All inputs are protected as shown below. Input voltage magnitudes up to 500 mV above the supply voltage or 500 mV below GND will not damage th

Página 15

Typical Performance Characteristics VA=VD=VDI/O = 3V, fCLK= 42 MHz, unless otherwisespecified (Continued)INL vs VAINL vs Temperature SINAD and ENOB vs

Página 16

Specification DefinitionsANALOG INPUT BANDWIDTH is a measure of the fre-quency at which the reconstructed output fundamental drops3 dB below its low f

Página 17

Timing DiagramFunctional DescriptionThe ADC08351 achieves 6.8 effective bits at 21 MHz inputfrequency with 42 MHz clock frequency digitizing to eight

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