ADC12DS105_08 Datasheet, PDF (1/26 Pages) National Semiconductor (TI) – Dual 12-Bit, 105 MSPS A/D Converter with Serial LVDS Outputs

February 21, 2008
ADC12DS105
Dual 12-Bit, 105 MSPS A/D Converter with Serial LVDS
Outputs
General Description
The ADC12DS105 is a high-performance CMOS analog-to-
digital converter capable of converting two analog input sig-
nals into 12-bit digital words at rates up to 105 Mega Samples
Per Second (MSPS). The digital outputs are serialized and
provided on differential LVDS signal pairs. This converter us-
es a differential, pipelined architecture with digital error cor-
rection and an on-chip sample-and-hold circuit to minimize
power consumption and the external component count, while
providing excellent dynamic performance. The ADC12DS105
may be operated from a single +3.0V or 3.3V power supply.
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 ADC12DS105 can be operated with an ex-
ternal 1.2V reference. The selectable duty cycle stabilizer
maintains performance over a wide range of clock duty cy-
cles. A serial interface allows access to the internal registers
for full control of the ADC12DS105's functionality. The AD-
C12DS105 is available in a 60-lead LLP package and oper-
ates over the industrial temperature range of −40°C to +85°C
Features
■ ^{Clock Duty Cycle Stabilizer}
■ ^{Single +3.0 or 3.3V supply operation}
■ ^{Serial LVDS Outputs}
■ ^{Serial Control Interface}
■ ^{Overrange outputs}
■ ^{60-pin LLP package, (9x9x0.8mm, 0.5mm pin-pitch)}
Key Specifications
■ ^Resolution
■ ^{Conversion Rate}
■ ^{SNR (f}_IN ^{= 240 MHz)}
■ ^{SFDR (f}_IN ^{= 240 MHz)}
■ ^{Full Power Bandwidth}
■ ^{Power Consumption}
12 Bits
105 MSPS
68.5 dBFS (typ)
83 dBFS (typ)
1 GHz (typ)
1 W (typ)
Applications
■ ^{High IF Sampling Receivers}
■ ^{Wireless Base Station Receivers}
■ ^{Test and Measurement Equipment}
■ ^{Communications Instrumentation}
■ ^{Portable Instrumentation}
Connection Diagram
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