ADC14155
14-Bit, 155 MSPS, 1.1 GHz Bandwidth A/D Converter
General Description
The ADC14155 is a high-performance CMOS analog-to-
digital converter capable of converting analog input signals
into 14-bit digital words at rates up to 155 Mega Samples Per
Second (MSPS). This converter uses a differential, pipelined
architecture with digital error correction and an on-chip
sample-and-hold circuit to minimize power consumption and
the external component count, while providing excellent dy-
namic performance. A unique sample-and-hold stage yields
a full-power bandwidth of 1.1 GHz. The ADC14155 operates
from dual +3.3V and +1.8V power supplies and consumes
974 mW of power at 155 MSPS.
The separate +1.8V supply for the digital output interface
allows lower power operation with reduced noise. A power-
down feature reduces the power consumption to 5 mW with
the clock input disabled, while still allowing fast wake-up time
to full operation.
The differential inputs provide a full scale differential input
swing equal to 2 times the reference voltage. A stable 1.0V
internal voltage reference is provided, or the ADC14155 can
be operated with an external reference.
For optimum performance, it is recommended to operate the
ADC14155 with a differential clock input, which doubles the
clock amplitude compared with single-ended clock opera-
tion. Clock mode (differential versus single-ended) and out-
put data format (offset binary versus 2’s complement) are
pin-selectable. A duty cycle stabilizer maintains performance
over a wide range of clock duty cycles.
The ADC14155 is available in a 48-lead LLP package and
operates over the industrial temperature range of −40˚C to
+85˚C.
Features
n 1.1 GHz Full Power Bandwidth
n Internal sample-and-hold circuit
n Low power consumption
n Internal precision 1.0V reference
n Single-ended or Differential clock modes
n Data Ready output clock
n Clock Duty Cycle Stabilizer
n Dual +3.3V and +1.8V supply operation (+/- 10%)
n Power-down mode
n Offset binary or 2’s complement output data format
n 48-pin LLP package, (7x7x0.8mm, 0.5mm pin-pitch)
Key Specifications
n Resolution 14 Bits
n Conversion Rate 155 MSPS
n SNR (f
IN
= 70 MHz) 71.4 dBFS (typ)
n SFDR (f
IN
= 70 MHz) 85.3 dBFS (typ)
n ENOB (f
IN
= 70 MHz) 11.5 bits (typ)
n Full Power Bandwidth 1.1 GHz (typ)
n Power Consumption 974 mW (typ)
Applications
n High IF Sampling Receivers
n Wireless Base Station Receivers
n Power Amplifier Linearization
n Multi-carrier, Multi-mode Receivers
n Test and Measurement Equipment
n Communications Instrumentation
n Radar Systems
PRELIMINARY
May 2006
ADC14155
14-Bit,
155
MSPS,
1.1
GHz
Bandwidth
A/D
Converter
© 2006 National Semiconductor Corporation DS201790 www.national.com