Rainbow-electronics ADC12L066 Manual de usuario

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ADC12L066
12-Bit, 66 MSPS, 450 MHz Bandwidth A/D Converter with
Internal Sample-and-Hold
General Description
The ADC12L066 is a monolithic CMOS analog-to-digital con-
verter capable of converting analog input signals into 12-bit
digital words at 66 Megasamples per second (MSPS), mini-
mum, with typical operation possible up to 80 MSPS. This
converter uses a differential, pipeline architecture with digital
error correction and an on-chip sample-and-hold circuit to
minimize die size and power consumption while providing
excellent dynamic performance. A unique sample-and-hold
stage yields a full-power bandwidth of 450 MHz. Operating
on a single 3.3V power supply, this device consumes just
357 mW at 66 MSPS, including the reference current. The
Power Down feature reduces power consumption to just
50 mW.
The differential inputs provide a full scale input swing equal
to
±
V
REF
with the possibility of a single-ended input. Full use
of the differential input is recommended for optimum perfor-
mance. For ease of use, the buffered, high impedance,
single-ended reference input is converted on-chip to a differ-
ential reference for use by the processing circuitry. Output
data format is 12-bit offset binary.
This device is available in the 32-lead LQFP package and
will operate over the industrial temperature range of −40˚C to
+85˚C. An evaluation board is available to facilitate the
evaluation process.
Features
n Single supply operation
n Low power consumption
n Power down mode
n On-chip reference buffer
Key Specifications
n Resolution 12 Bits
n Conversion Rate 66 MSPS
n Full Power Bandwidth 450 MHz
n DNL
±
0.4 LSB (typ)
n SNR (f
IN
= 10 MHz) 66 dB (typ)
n SFDR (f
IN
= 10 MHz) 80 dB (typ)
n Data Latency 6 Clock Cycles
n Supply Voltage +3.3V
±
300 mV
n Power Consumption, 66 MHz 357 mW (typ)
Applications
n Ultrasound and Imaging
n Instrumentation
n Cellular Base Stations/Communications Receivers
n Sonar/Radar
n xDSL
n Wireless Local Loops
n Data Acquisition Systems
n DSP Front Ends
Connection Diagram
20032801
TRI-STATE
®
is a registered trademark of National Semiconductor Corporation.
December 2003
ADC12L066 12-Bit, 66 MSPS, 450 MHz Bandwidth A/D Converter with Internal Sample-and-Hold
© 2003 National Semiconductor Corporation DS200328 www.national.com
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Indice de contenidos

Pagina 1 - Internal Sample-and-Hold

ADC12L06612-Bit, 66 MSPS, 450 MHz Bandwidth A/D Converter withInternal Sample-and-HoldGeneral DescriptionThe ADC12L066 is a monolithic CMOS analog-to-

Pagina 2 - Block Diagram

Specification DefinitionsAPERTURE DELAY is the time after the rising edge of theclock to when the input signal is acquired or held for conver-sion.APE

Pagina 3

Timing Diagram20032809Output TimingTransfer Characteristic20032810FIGURE 1. Transfer CharacteristicADC12L066www.national.com11

Pagina 4

Typical Performance Characteristics VA=VD= 3.3V, VDR= 2.5V, fCLK= 66 MHz, fIN= 25 MHz,VREF= 1.0V, unless otherwise stated.DNL DNL vs. fCLK200328E62003

Pagina 5

Typical Performance Characteristics VA=VD= 3.3V, VDR= 2.5V, fCLK= 66 MHz, fIN= 25 MHz,VREF= 1.0V, unless otherwise stated. (Continued)INL vs. Clock Du

Pagina 6

Typical Performance Characteristics VA=VD= 3.3V, VDR= 2.5V, fCLK= 66 MHz, fIN= 25 MHz,VREF= 1.0V, unless otherwise stated. (Continued)SNR vs. Clock Du

Pagina 7

Typical Performance Characteristics VA=VD= 3.3V, VDR= 2.5V, fCLK= 66 MHz, fIN= 25 MHz,VREF= 1.0V, unless otherwise stated. (Continued)THD vs. fCLKTHD

Pagina 8

Typical Performance Characteristics VA=VD= 3.3V, VDR= 2.5V, fCLK= 66 MHz, fIN= 25 MHz,VREF= 1.0V, unless otherwise stated. (Continued)SINAD vs. VCMSIN

Pagina 9 - AC Electrical Characteristics

Typical Performance Characteristics VA=VD= 3.3V, VDR= 2.5V, fCLK= 66 MHz, fIN= 25 MHz,VREF= 1.0V, unless otherwise stated. (Continued)SFDR vs. VDRSFDR

Pagina 10 - Specification Definitions

Typical Performance Characteristics VA=VD= 3.3V, VDR= 2.5V, fCLK= 66 MHz, fIN= 25 MHz,VREF= 1.0V, unless otherwise stated. (Continued)Power Consumptio

Pagina 11 - Transfer Characteristic

Typical Performance Characteristics VA=VD= 3.3V, VDR= 2.5V, fCLK= 66 MHz, fIN= 25 MHz,VREF= 1.0V, unless otherwise stated. (Continued)Spectral Respons

Pagina 12

Ordering InformationIndustrial (−40˚C ≤ TA≤ +85˚C) PackageADC12L066CIVY 32 Pin LQFPADC12L066CIVYX 32 Pin LQFP Tape and ReelADC12L066EVAL Evaluation Bo

Pagina 13

Functional DescriptionOperating on a single +3.3V supply, the ADC12L066 uses apipeline architecture and has error correction circuitry to helpensure m

Pagina 14

Applications Information (Continued)The two input signals should be exactly 180˚ out of phasefrom each other and of the same amplitude. For singlefreq

Pagina 15

Applications Information (Continued)2.0 DIGITAL INPUTSDigital inputs are TTL/CMOS compatible and consist of CLK,OE and PD.2.1 CLKThe CLK signal contro

Pagina 16

Applications Information (Continued)20032813FIGURE 4. Simple Application Circuit with Single-Ended to Differential Buffer20032814FIGURE 5. Differentia

Pagina 17

Applications Information (Continued)4.0 POWER SUPPLY CONSIDERATIONSThe power supply pins should be bypassed with a 10 µFcapacitor and with a 0.1 µF ce

Pagina 18

Applications Information (Continued)weight will have little effect upon the logic-generated noise.This is because of the skin effect. Total surface ar

Pagina 19

Applications Information (Continued)cause faulty or erratic operation. It is not uncommon for highspeed digital components (e.g., 74F and 74AC devices

Pagina 20 - Applications Information

Physical Dimensions inches (millimeters) unless otherwise noted32-Lead LQFP PackageOrdering Number ADC12L066CIVYNS Package Number VBE32ALIFE SUPPORT P

Pagina 21

Pin Descriptions and Equivalent CircuitsPin No. Symbol Equivalent Circuit DescriptionANALOG I/O2VIN+Analog signal Input pins. With a 1.0V reference vo

Pagina 22

Pin Descriptions and Equivalent Circuits (Continued)Pin No. Symbol Equivalent Circuit Description14–19,22–27D0–D11Digital data output pins that make u

Pagina 23

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

Pagina 24

Converter Electrical Characteristics (Continued)Unless otherwise specified, the following specifications apply for AGND = DGND = DR GND = 0V, VA=VD= +

Pagina 25

Converter Electrical Characteristics (Continued)Unless otherwise specified, the following specifications apply for AGND = DGND = DR GND = 0V, VA=VD= +

Pagina 26

Converter Electrical Characteristics (Continued)Unless otherwise specified, the following specifications apply for AGND = DGND = DR GND = 0V, VA=VD= +

Pagina 27 - NS Package Number VBE32A

AC Electrical CharacteristicsUnless otherwise specified, the following specifications apply for AGND = DGND = DR GND = 0V, VA=VD= +3.3V,VDR= +2.5V, PD

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