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PDF CLC952AJMSA Data sheet ( Hoja de datos )
| Número de pieza | CLC952AJMSA | |
| Descripción | CLC949ACQ | |
| Fabricantes | National Semiconductor | |
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CLC952
12-bit, 41MSPS Monolithic A/D Converter
September 1997
General Description
The CLC952 is a complete monolithic 12-bit 41MSPS analog-to-
digital converter system. Fabricated from a 0.8µm BiCMOS
process, the CLC952’s on-chip features include a very
linear wideband track-and-hold, bandgap voltage reference and a
proprietary 12-bit multi-stage quantizer. The CLC952 has been
designed for wideband digital communications receivers and
features a 72dBc spurious-free dynamic range (SFDR) and 64dB
signal-to-noise ratio (SNR).
The CLC952 operates from a standard ±5V power supply and
features excellent noise isolation with its >60dB power-supply
rejection ratio (PSRR). All digital control functions and output
registers are TTL compatible. The CLC952AC operates over the
commercial temperature range (0°C to 70°C), and the CLC952AJ
operates over the industrial temperature range (-40°C to 85°C)
version. The CLC952 is available in a 28-pin SSOP that provides
an extremely small footprint for reduced board space. National
Semiconductor thoroughly tests each part to verify full
compliance with guaranteed specifications.
Features
s 41MSPS
s Wide dynamic range
SFDR: 72dBc
SNR: 64dB
s Low power dissipation: 660mW
s Ground centered,
DC-coupled analog input
s Excellent PSRR: >60dB
s Very small package: 28-pin SSOP
s Low cost
Applications
s Cellular base-stations
s Digital communications
s Infrared/CCD imaging
s IF sampling
s Electro-optics
s Instrumentation
s Medical imaging
s High definition video
CLC952
Block Diagram
Vin
© 1997 National Semiconductor Corporation
Printed in the U.S.A.
Offset
Adjust
VREF
Input
Amp
2.4V Voltage
Reference
T/H
Amplifier
12-bit Subranging
Quantizer
Timing
Generator
TTL Output
Buffer
D11 MSB
•
•
D0 LSB
ENCODE
http://www.national.com
1 page  
CLC952 Typical Performance Characteristics (VCC = +5V, VEE = -5V)
SFDR & SNR vs. Input Amplitude
80
70
60
50
40 SFDR
30
SNR
20
10
-50
Sample Rate = 40.96MSPS
AIN = 9.67MHz
-40 -30 -20 -10
Input Amplitude (dBFS)
0
SFDR & SNR vs. Input Amplitude
80
70
SFDR
60
50
40
30
20
-50
SNR
Sample Rate = 30.72MSPS
AIN = 7.37MHz
-40 -30 -20 -10
Input Amplitude (dBFS)
0
SFDR & SNR vs. Sample Rate
90
SFDR
80
70 SNR
60
50
40
0
FS – 1dB
AIN = 0.41MHz
10 20 30 40 50
Sample Rate (MSPS)
60
SFDR & SNR vs. Sample Rate
100
SFDR
80
60 SNR
40
20
0
0
FS – 1dB
AIN = 4.99MHz
10 20 30 40 50 60
Sample Rate (MSPS)
70
SFDR & SNR vs. Sample Rate
100
SFDR
80
60 SNR
40
20
0
-20
0
FS – 1dB
AIN = 9.67MHz
10 20 30 40 50 60
Sample Rate (MSPS)
70
SFDR & SNR vs. Input Frequency
80
SFDR
70
SNR
60
40.96MSPS
50
1 10
Input Frequency (MHz)
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