The MAX1197 is a 3V, dual, 8-bit analog-to-digital converter
(ADC) featuring fully differential wideband trackand-
hold (T/H) inputs, driving two ADCs. The MAX1197
is optimized for low-power, small size, and high-dynamic
performance for applications in imaging, instrumentation
and digital communications. This ADC operates
from a single 2.7V to 3.6V supply, consuming only
120mW while delivering a typical signal-to-noise and
distortion (SINAD) of 48.5dB at an input frequency of
30MHz and a sampling rate of 60Msps. The T/H-driven
input stages incorporate 400MHz (-3dB) input amplifiers.
The converters may also be operated with singleended
inputs. In addition to low operating power, the
MAX1197 features a 3mA sleep mode as well as a
0.1μA power-down mode to conserve power during idle
periods.
An internal 2.048V precision bandgap reference sets
the full-scale range of the ADC. A flexible reference
structure allows the use of this internal or an externally
applied reference, if desired, for applications requiring
increased accuracy or a different input voltage range.
The MAX1197 features parallel, CMOS-compatible threestate
outputs. The digital output format can be set to two’s
complement or straight offset binary through a single control
pin. The device provides for a separate output power
supply of 1.7V to 3.6V for flexible interfacing with various
logic families. The MAX1197 is available in a 7mm x 7mm,
48-pin TQFP package, and is specified for the extended
industrial (-40°C to +85°C) temperature range.
Pin-compatible lower and higher speed versions of the
MAX1197 are also available. Refer to the MAX1195 data
sheet for 40Msps and the MAX1198 data sheet for
100Msps. In addition to these speed grades, this family
will include a multiplexed output version (MAX1196,
40Msps), for which digital data is presented time interleaved
and on a single, parallel 8-bit output port.
For a 10-bit, pin-compatible upgrade, refer to the
MAX1182 data sheet. With the N.C. pins of the
MAX1197 internally pulled down to ground, this ADC
becomes a drop-in replacement for the MAX1182.