CLC5958PCASM National Semiconductor, CLC5958PCASM Datasheet

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CLC5958PCASM

Manufacturer Part Number
CLC5958PCASM
Description
EVALUATION BOARD FOR CLC5958
Manufacturer
National Semiconductor
Datasheet

Specifications of CLC5958PCASM

Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
*CLC5958PCASM
© 2001 National Semiconductor Corporation
CLC5958
14-Bit, 52 MSPS A/D Converter
General Description
The
analog-to-digital converter. The ultra-wide dynamic range
and high sample rate of the device make it an excellent
choice for wideband receivers found in multi-channel
base-stations. The CLC5958 integrates a low distortion
track-and-hold amplifier and a 14-bit multi-stage quantizer
on a single die. Other features include differential analog
inputs, low jitter differential clock inputs, an internal bandgap
voltage reference, and CMOS/TTL compatible outputs. The
CLC5958 is fabricated on the National ABIC-V 0.8 micron
BiCMOS process.
The CLC5958 features a 90 dB spurious free dynamic range
(SFDR) and 70 dB signal-to-noise ratio (SNR). The balanced
differential analog inputs ensure low even-order distortion,
while the differential clock inputs permit the use of balanced
clock signals to minimize clock jitter. The 48-pin CSP pack-
age provides an extremely small footprint for applications
where space is a critical consideration. The package also
provides a very low thermal resistance to ambient. The
CLC5958 may be operated with a single +5V power supply.
Alternatively, an additional supply may be used to program
the digital output levels over the range of +3.3V to +5V.
Operation over the industrial temperature range of −40˚C to
+85˚C is guaranteed. National Semiconductor tests each
part to verify compliance with the guaranteed specifications.
Block Diagram
CLC5958
is
a
monolithic
14-bit,
DS015019
52
MSPS
Features
n Ultra-wide dynamic range
n Excellent performance to Nyquist
n IF sampling capability
n Very small package: 48-pin CSP
n Programmable Output Levels: 3.3V to 5V
Key Specifications
n Sample Rate
n SFDR
n Noise floor
Applications
n Multi-channel basestations
n Multi-standard basestations:
n Smart antenna systems
n Wireless local loop
n Wideband digital communications
GSM, WCDMA, DAMPS, etc.
01501901
February 2001
www.national.com
−72 dBFS
52 MSPS
90 dB

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CLC5958PCASM Summary of contents

Page 1

... Alternatively, an additional supply may be used to program the digital output levels over the range of +3.3V to +5V. Operation over the industrial temperature range of −40˚C to +85˚C is guaranteed. National Semiconductor tests each part to verify compliance with the guaranteed specifications. Block Diagram © 2001 National Semiconductor Corporation ...

Page 2

... DV 37 www.national.com Ordering Information CLC5958SLB CLC5958PCASM 01501902 Differential inputs. Self biased at a common mode voltage of +3.25V. The ADC full scale input is 2.048 V Differential clock inputs. ENCODE initiates a new data conversion cycle on each rising edge. Clock signals may be sinusoidal or square waves with PECL encode levels. The falling edge of ENCODE clocks internal pipeline stages ...

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 ...

Page 4

Converter Electrical Characteristics The following specifications apply for +85˚C, all other limits T = 25˚C (Note 4). max A Symbol Parameter Next Worst Clock Spur (Note 9) Calibration Side-band Coefficient (Note 10) DC ACCURACY AND PERFORMANCE DNL ...

Page 5

Converter Electrical Characteristics The following specifications apply for +85˚C, all other limits T = 25˚C (Note 4). max A Symbol Parameter +3.3V Supply Current ( (Note 3) Power Dissipation V Power Supply Rejection Ratio CC ...

Page 6

Typical Performance Characteristics www.national.com (V = +5V), 52 MSPS; unless specified CC 01501903 01501905 01501907 01501909 6 01501904 01501906 01501908 01501910 ...

Page 7

Typical Performance Characteristics (V = +5V), 52 MSPS; unless specified (Continued) CC 01501934 01501912 01501914 01501916 7 01501911 01501913 01501915 01501917 www.national.com ...

Page 8

Typical Performance Characteristics Timing Diagram www.national.com (V = +5V), 52 MSPS; unless specified (Continued) CC 01501918 CLC5958 Aperture Delay Diagram t : Effective Aperture Delay Nominally - 0.2ns A CLC5958 ENCODE to Data Timing Diagram CLC5958 ENCODE to DAV Timing ...

Page 9

CLC5958 Application Information Driving the Analog Inputs The differential analog inputs, A and internal 3.25V reference (a 2.4V bandgap reference plus a diode) through an on-chip resistance of 500 . This bias voltage is set for optimum ...

Page 10

CLC5958 Application Information (Continued) The transformer converts the single-ended clock signal to a differential signal. The center-tap of the secondary is biased by the V potential of the ECL buffer. The diodes in the BB secondary limit the input swing ...

Page 11

CLC5958 Application Information (Continued) FIGURE 5. Sideband Magnitude vs. Sideband Offset Power Supplies The V pins supply power to all of the CLC5958 circuitry CC with the exception of the digital output buffers. The DV pins provide power to the ...

Page 12

www.national.com 12 ...

Page 13

... Evaluation Board (Continued) CLC5958PCASM Layer 1 CLC5958PCASM Layer 2 CLC5958PCASM Layer 3 01501930 CLC5958PCASM Layer 4 01501932 13 01501931 01501933 www.national.com ...

Page 14

Evaluation Printed Circuit Board The CLC5958 evaluation printed circuit board provides a convenient test bed for rapid evaluation of the CLC5958. It illustrates the proper approach to layout in order to achieve best performance, and provides a performance benchmark. Analog ...

Page 15

... 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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