ADC12C080 Datasheet, PDF (1/24 Pages) National Semiconductor (TI) – 12-Bit, 65/80 MSPS A/D Converter

August 2007
ADC12C080
12-Bit, 65/80 MSPS A/D Converter
General Description
The ADC12C080 is a high-performance CMOS analog-to-
digital converter capable of converting analog input signals
into 12-bit digital words at rates up to 80 Mega Samples Per
Second (MSPS). This converter uses a differential, pipelined
architecture with digital error correction and an on-chip sam-
ple-and-hold circuit to minimize power consumption and the
external component count, while providing excellent dynamic
performance. A unique sample-and-hold stage yields a full-
power bandwidth of 1 GHz. The ADC12C080 may be oper-
ated from a single +3.0V power supply and consumes low
power. A separate +2.5V supply may be used for the digital
output interface which allows lower power operation with re-
duced noise. A power-down feature reduces the power con-
sumption to very low levels while still allowing fast wake-up
time to full operation. The differential inputs accept a 2V full
scale differential input swing. A stable 1.2V internal voltage
reference is provided, or the ADC12C080 can be operated
with an external 1.2V reference. Output data format (offset
binary versus 2's complement) and duty cycle stabilizer are
pin-selectable. The duty cycle stabilizer maintains perfor-
mance over a wide range of clock duty cycles.
The ADC12C080 is available in a 32-lead LLP package and
operates over the industrial temperature range of −40°C to
+85°C.
Features
■ ^{1 GHz Full Power Bandwidth}
■ ^{Internal reference and sample-and-hold circuit}
■ ^{Low power consumption}
■ ^{Data Ready output clock}
■ ^{Clock Duty Cycle Stabilizer}
■ ^{Single +3.0V supply operation}
■ ^{Power-down mode}
■ ^{32-pin LLP package, (5x5x0.8mm, 0.5mm pin-pitch)}
Key Specifications
■ ^Resolution
■ ^{Conversion Rate}
■ ^{SNR (f}_IN ^{= 170 MHz)}
■ ^{SFDR (f}_IN ^{= 170 MHz)}
■ ^{Full Power Bandwidth}
■ ^{Power Consumption}
12 Bits
80 MSPS
68 dBFS (typ)
86 dBFS (typ)
1 GHz (typ)
300 mW (typ)
Applications
■ ^{High IF Sampling Receivers}
■ ^{Wireless Base Station Receivers}
■ ^{Test and Measurement Equipment}
■ ^{Communications Instrumentation}
■ ^{Portable Instrumentation}
Connection Diagram
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