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Features
70MSPS
Wide dynamic range:
SFDR: 74dBc
SFDR with dither: 85dBFS
SNR: 67dB
IF sampling capability
Input bandwidth = 0-300MHz
Low power dissipation: 640mW
Very small package: 48-pin TSSOP
Single +5V supply
Data valid clock output
Programmable output levels: 3.3V or 2.5V
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 differential universal clock inputs, a low distortion track-and-hold with 0-300MHz input bandwidth, a bandgap voltage reference, 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 consideration. 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 specifications.
Applications
Cellular base stations
Digital communications
Infrared/CCD imaging
IF sampling
Electro-optics
Instrumentation
Medical imaging
High definition video
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