CLC5956PCASM National Semiconductor, CLC5956PCASM Datasheet

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CLC5956PCASM

Manufacturer Part Number
CLC5956PCASM
Description
EVALUATION BOARD FOR CLC5956
Manufacturer
National Semiconductor
Datasheet

Specifications of CLC5956PCASM

Number Of Adc's
1
Number Of Bits
12
Sampling Rate (per Second)
65M
Data Interface
Parallel
Inputs Per Adc
1 Differential
Input Range
2.048 Vpp
Power (typ) @ Conditions
615mW @ 65MSPS
Voltage Supply Source
Analog and Digital
Operating Temperature
-40°C ~ 85°C
Utilized Ic / Part
CLC5956
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
*CLC5956PCASM
© 2001 National Semiconductor Corporation
CLC5956
12-Bit, 65 MSPS Broadband Monolithic A/D Converter
General Description
The
analog-to-digital converter subsystem. The device has been
optimized for use in cellular base stations and other applica-
tions where high resolution, high sampling rate, wide dy-
namic range, low power dissipation, and compact size are
required. The CLC5956 features differential analog inputs,
low jitter differential PECL clock inputs, a low distortion
track-and-hold with DC to 300 MHz input bandwidth, a band-
gap voltage reference, TTL compatible CMOS output logic,
and a proprietary 12-bit multi-stage quantizer. The CLC5956
is fabricated on the ABIC-IV 0.8 micron BiCMOS process.
The part features a 73 dB spurious free dynamic range
(SFDR) and 67 dB SNR. The wideband track-and-hold al-
lows sampling of IF signals to greater than 250 MHz. The
part produces two-tone, dithered, spurious-free dynamic
range of 83 dBFS at 75 MHz input frequency. The differential
analog input provides excellent common-mode rejection,
while the differential PECL clock inputs permit the use of
balanced transmission to minimize jitter in distributed sys-
tems. The 48-pin TSSOP package provides an extremely
small footprint for applications where space is a critical con-
sideration. The CLC5956 operates from a single +5V power
supply over the industrial temperature range of −40˚C to
+85˚C. National thoroughly tests each part to verify full com-
pliance with the guaranteed specifications.
Block Diagram
CLC5956
is
a
monolithic
12-bit,
DS015011
65
MSPS
Features
n Wide dynamic range
n IF sampling capability
n 300 MHz input bandwidth
n Small 48-pin TSSOP
n Single +5V supply
n Low cost
Key Specifications
n Sample Rate
n SFDR
n SFDR with dither
n SNR
n Low power consumption
Applications
n Cellular base-stations
n Digital communications
n Infrared/CCD imaging
n IF sampling
n Electro-optics
n Instrumentation
n Medical imaging
n High definition video
DS015011-2
January 2001
www.national.com
65 MSPS
85 dBFS
615 mW
73 dBc
67 dB

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CLC5956PCASM Summary of contents

Page 1

... The CLC5956 operates from a single +5V power supply over the industrial temperature range of −40˚C to +85˚C. National thoroughly tests each part to verify full com- pliance with the guaranteed specifications. Block Diagram © 2001 National Semiconductor Corporation Features n Wide dynamic range 12-bit, 65 ...

Page 2

... NC 27, 28, 29 www.national.com Ordering Information CLC5956IMTD CLC5956IMTDX CLC5956PCASM DS015011-1 Differential input with a common mode voltage of +2.4V. The ADC full scale input is 1.024 V signals. Differential clock where ENCODE initiates a new data conversion cycle on each rising edge. Logic for these inputs are a 50% duty cycle differential PECL signal ...

Page 3

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Positive Supply Voltage ( Differential Voltage between any Two Grounds Analog Input Voltage Range Digital Input Voltage Range Output Short Circuit Duration (one-pin ...

Page 4

Converter Electrical Characteristics The following specifications apply for AV for −40˚ +85˚C, all other limits T A min max Symbol Parameter ANALOG INPUTS V Analog Diff Input Voltage Range IN Analog Input Resistance ...

Page 5

Typical Performance Characteristics SNR and SFDR vs Input Frequency DS015011-3 SNR and SFDR vs Sample Rate DS015011-6 Differential Non-Linearity DS015011-9 SNR and SFDR vs Input Amplitude DS015011-12 ( +5V SNR and SFDR vs Input Frequency ...

Page 6

Typical Performance Characteristics Two Tone Output Spectrum (with Dither) DS015011-15 Spectral Response Timing Diagram www.national.com ( +5V) (Continued Two Tone Output Spectrum DS015011-16 SINAD vs Input Level DS015011-21 6 Two Tone Output Spectrum DS015011-17 DS015011-22 ...

Page 7

Full Scale Analog Input Levels Single IF Down Converter DS015011-19 7 DS015011-20 www.national.com ...

Page 8

Evaluation Board www.national.com Evaluation Board Schematic 8 DS015011-23 ...

Page 9

Evaluation Board (Continued) CLC730079 Layer 1 CLC730079 Layer 3 DS015011-24 CLC730079 Layer 2 DS015011-25 CLC730079 Layer 4 9 DS015011-26 DS015011-27 www.national.com ...

Page 10

... CLC5956. Supply Voltages (J1 pins 31 A&B and 32 A&B) The CLC5956PCASM is powered from a single 5V supply connected from the referenced pins on the Eurocard con- nector. The recommended supplies are low noise linear supplies. ...

Page 11

CLC5957 and CLC5956 Interchangeability TABLE 1. CLC5957 and CLC5956 Pin Compatibility Pin No. Pin 21 Pin 27 Pin 28 Pin 29 * Pin should be buffered as described in the CLC5956 and CLC5957 datasheet pin definitions. Failure ...

Page 12

... NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant ...

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