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ADC08351CIMTC Schematic ( PDF Datasheet ) - National Semiconductor

Teilenummer ADC08351CIMTC
Beschreibung 8-Bit/ 42 MSPS/ 40 mW A/D Converter
Hersteller National Semiconductor
Logo National Semiconductor Logo 




Gesamt 15 Seiten
ADC08351CIMTC Datasheet, Funktion
March 2000
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 is designed to operate over the
commercial temperature range of −20˚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
n Resolution
8 Bits
n Maximum Sampling Frequency
42 MSPS (min)
n ENOB @ fCLK = 42 MHz, fIN = 4.4 MHz 7.2 Bits (typ)
n Guaranteed No Missing Codes
n 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
Ordering Information
ADC08351CIMTC
ADC08351CIMTCX
TSSOP
TSSOP (tape & reel)
TRI-STATE® is a registered trademark of National Semiconductor Corporation.
© 2000 National Semiconductor Corporation DS100895
DS100895-1
www.national.com






ADC08351CIMTC Datasheet, Funktion
Converter Electrical Characteristics (Continued)
DS100895-6
Note 8: To guarantee accuracy, it is required that VA and VD be well bypassed. Each VA and VD pin must be decoupled with separate bypass capacitors.
Note 9: Typical figures are at TJ = 25˚C, and represent most likely parametric norms. Test limits are guaranteed to National’s AOQL (Average Outgoing Quality
Level).
Typical Performance Characteristics VA = VD = VD I/O = 3V, fCLK = 42 MHz, unless otherwise
specified
DNL @ 42 MSPS
DNL vs Sample Rate
DNL vs VA
DS100895-7
DNL vs Temperature
INL @ 42 MSPS
DS100895-8
INL vs Sample Rate
DS100895-9
INL vs VA
DS100895-10
INL vs Temperature
DS100895-11
DS100895-12
SINAD and ENOB vs fIN
www.national.com
DS100895-13
DS100895-14
6
DS100895-15

6 Page









ADC08351CIMTC pdf, datenblatt
Applications Information (Continued)
DS100895-27
FIGURE 5. AC Coupled Circuit for a Low Impedance Source Located Near the Converter
www.national.com
FIGURE 6. Non-inverting Input Circuit for Remote Signal Source
DS100895-28
12

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