CLC5957_02 Datasheet, PDF (1/16 Pages) National Semiconductor (TI) – 12-Bit, 70MSPS Broadband Monolithic A/D Converter

April 2002
CLC5957
12-Bit, 70 MSPS Broadband Monolithic A/D Converter
General Description
The CLC5957 is a monolithic 12-bit, 70MSPS analog-to-
digital converter. The device has been optimized for use in
IF-sampled digital receivers and other applications where
high resolution, high sampling rate, wide dynamic range, low
power dissipation, and compact size are required. The
CLC5957 features differential analog inputs, low jitter differ-
ential universal clock inputs, a low distortion track-and-hold
with 0-300MHz input bandwidth, a bandgap voltage refer-
ence, data valid clock output, TTL compatible CMOS (3.3V
or 2.5V) programmable output logic, and a proprietary 12-bit
multi-stage quantizer. The CLC5957 is fabricated on the
ABIC-V 0.8 micron BiCMOS process.
The CLC5957 features a 74dBc spurious free dynamic
range (SFDR) and a 67dB signal to noise ratio (SNR). The
wideband track-and-hold allows sampling of IF signals to
greater than 250MHz. The part produces two-tone, dithered,
SFDR of 83dBFS at 75MHz input frequency. The differential
analog input provides excellent common mode rejection,
while the differential universal clock inputs minimize jitter.
The 48-pin TSSOP package provides an extremely small
footprint for applications where space is a critical consider-
ation. The CLC5957 operates from a single +5V power
supply. 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 specifi-
cations.
Features
n 70MSPS
n Wide dynamic range:
— SFDR: 74dBc
— SFDR with dither: 85dBFS
— SNR: 67dB
n IF sampling capability
n Input bandwidth = 0-300MHz
n Low power dissipation: 640mW
n Very small package: 48-pin TSSOP
n Single +5V supply
n Data valid clock output
n Programmable output levels: 3.3V or 2.5V
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
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Block Diagram
© 2002 National Semiconductor Corporation DS015029
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