Rainbow-electronics ADC08060 Manual de usuario

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ADC08060
8-Bit, 20 MSPS to 60 MSPS, 1.3 mW/MSPS A/D Converter
General Description
The ADC08060 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 of 20 MSPS to 70
MSPS with outstanding dynamic performance over its full
operating range while consuming just 1.3 mW per MHz of
clock frequency. That’s just 78 mW of power at 60 MSPS.
Raising the PD pin puts the ADC08060 into a Power Down
mode where it consumes just 1 mW.
The unique architecture achieves 7.5 Effective Bits with
25 MHz input frequency. The excellent DC and AC charac-
teristics of this device, together with its low power consump-
tion and single +3V supply operation, make it ideally suited
for many imaging and communications applications, includ-
ing use in portable equipment. Furthermore, the ADC08060
is resistant to latch-up and the outputs are short-circuit proof.
The top and bottom of the ADC08060’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 interfac-
ing with 3V or 2.5V logic. The digital inputs (CLK and PD) are
TTL/CMOS compatible.
The ADC08060 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 ADC08060.
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 60 MSPS (min)
n DNL 0.4 LSB (typ)
n ENOB 7.5 bits (typ) at f
IN
=25MHz
n THD −60 dB (typ)
n No missing codes Guaranteed
n Power Consumption
— Operating 1.3 mW/MSPS (typ)
— Power Down Mode 1 mW (typ)
Applications
n Digital imaging systems
n Communication systems
n Portable instrumentation
n Viterbi decoders
n Set-top boxes
Pin Configuration
20006201
November 2003
ADC08060 8-Bit, 60 MSPS, 1.3 mW/MSPS A/D Converter
© 2003 National Semiconductor Corporation DS200062 www.national.com
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Indice de contenidos

Pagina 1 - ADC08060

ADC080608-Bit, 20 MSPS to 60 MSPS, 1.3 mW/MSPS A/D ConverterGeneral DescriptionThe ADC08060 is a low-power, 8-bit, monolithic analog-to-digital conver

Pagina 2 - Ordering Information

Typical Performance Characteristics VA=DRVD= 3V, fCLK= 60 MHz, fIN= 10 MHz, unlessotherwise stated (Continued)SINAD/ENOB vs. Temperature SINAD/ENOB vs

Pagina 3

Typical Performance Characteristics VA=DRVD= 3V, fCLK= 60 MHz, fIN= 10 MHz, unlessotherwise stated (Continued)Spectral Response@fIN= 10.1 MHz Spectral

Pagina 4

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

Pagina 5

Timing DiagramFunctional DescriptionThe ADC08060 uses a new, unique architecture thatachieves over 7.4 effective bits at input frequencies up to30 MHz

Pagina 6

Applications Information (Continued)The reference bias circuit of Figure 2 is very simple and theperformance is adequate for many applications. Howeve

Pagina 7

Applications Information (Continued)VRTshould always be at least 1.0V more positive than VRBto minimize noise.VRM(pin 9) is the center of the referenc

Pagina 8

Applications Information (Continued)The RC at the amplifier output filters the clock rate energythat comes out of the analog input due to the input sa

Pagina 9

Applications Information (Continued)4.0 THE DIGITAL INPUT PINSThe ADC08060 has two digital input pins: The PD pin andthe Clock pin.4.1 The PD PinThe P

Pagina 10

Applications Information (Continued)Figure 5 gives an example of a suitable layout. All analogcircuitry (input amplifiers, filters, reference componen

Pagina 11

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

Pagina 12 - Specification Definitions

Ordering InformationADC08060CIMT TSSOPADC08060CIMTX TSSOP (tape and reel)ADC08060EVAL Evaluation BoardBlock Diagram20006202Pin Descriptions and Equiva

Pagina 13 - Applications Information

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

Pagina 14

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

Pagina 15

Converter Electrical Characteristics (Continued)The following specifications apply for VA=DRVD= +3.0VDC,VRT= +1.9V, VRB= 0.3V, CL= 10 pF, fCLK= 60 MHz

Pagina 16

Converter Electrical Characteristics (Continued)The following specifications apply for VA=DRVD= +3.0VDC,VRT= +1.9V, VRB= 0.3V, CL= 10 pF, fCLK= 60 MHz

Pagina 17

Typical Performance Characteristics VA=DRVD= 3V, fCLK= 60 MHz, fIN= 10 MHz, unless other-wise statedINL INL vs. Temperature2000620820006214INL vs. Sup

Pagina 18

Typical Performance Characteristics VA=DRVD= 3V, fCLK= 60 MHz, fIN= 10 MHz, unlessotherwise stated (Continued)DNL vs. Supply Voltage DNL vs. Sample Ra

Pagina 19 - NS Package Number MTC24

Typical Performance Characteristics VA=DRVD= 3V, fCLK= 60 MHz, fIN= 10 MHz, unlessotherwise stated (Continued)SNR vs. Clock Duty Cycle Distortion vs.

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