ADC14C105_07 Datasheet, PDF (1/24 Pages) National Semiconductor (TI) – 14-Bit, 95/105 MSPS A/D Converter

August 2007
ADC14C105
14-Bit, 95/105 MSPS A/D Converter
General Description
The ADC14C105 is a high-performance CMOS analog-to-
digital converter capable of converting analog input signals
into 14-bit digital words at rates up to 105 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 ADC14C105 may be oper-
ated from a single +3.0V or +3.3V 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 reduced
noise. A power-down feature reduces the power consumption
to very low levels while still allowing fast wake-up time to full
operation. The differential inputs accept a 2V full scale differ-
ential input swing. A stable 1.2V internal voltage reference is
provided, or the ADC14C105 can be operated with an exter-
nal 1.2V reference. Output data format (offset binary versus
2's complement) and duty cycle stabilizer are pin-selectable.
The duty cycle stabilizer maintains performance over a wide
range of clock duty cycles.
The ADC14C105 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 or +3.3V supply operation}
■ ^{Power-down mode}
■ ^{32-pin LLP package, (5x5x0.8mm, 0.5mm pin-pitch)}
Key Specifications
■ ^Resolution
■ ^{Conversion Rate}
■ ^{SNR (f}_IN ^{= 240 MHz)}
■ ^{SFDR (f}_IN ^{= 240 MHz)}
■ ^{Full Power Bandwidth}
■ ^{Power Consumption}
■
14 Bits
105 MSPS
71 dBFS (typ)
82 dBFS (typ)
1 GHz (typ)
350 mW (typ, V_A=3.0V)
400 mW (typ, V_A=3.3V)
Applications
■ ^{High IF Sampling Receivers}
■ ^{Wireless Base Station Receivers}
■ ^{Test and Measurement Equipment}
■ ^{Communications Instrumentation}
■ ^{Portable Instrumentation}
Connection Diagram
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