The MAX2034 four-channel, low-power, ultra-low-noise
preamplifier is designed for ultrasound and medical
instrumentation applications. Each low-noise amplifier
has a single-ended input, differential output, a highly
accurate 19dB fixed gain, and a wide
-3dB bandwidth
of 70MHz. The high-gain accuracy of the amplifier
allows for exceptional channel-to-channel gain matching,
which is necessary for high-performance ultrasound-imaging applications. The MAX2034 also includes an on-chip programmable input impedance
feature that allows the device to be compatible with a
variety of common source impedances ranging from
50Ω to 1kΩ. The input impedance of each amplifier uses a feedback topology for active impedance matching. The active input impedance matching feature
achieves an exceptionally low 2.2dB noise figure with a
source and input impedance of 200Ω.
The MAX2034 has excellent dynamic and linearity performance
characteristics optimized for all ultrasound-imaging
modalities including second harmonic 2D
imaging and continuous wave Doppler. The device
achieves a second harmonic distortion of
-68dBc at
V
OUT = 1V
P-P and f
IN = 5MHz, and an ultrasound-specific* two-tone third-order intermodulation distortion performance
of -55dBc at V
OUT = 1V
P-P and f
IN = 5MHz.
The MAX2034 is also optimized for quick overload
recovery for operation under the large input signal conditions
typically found in ultrasound input-buffer imaging
applications.
The MAX2034 is available in a 48-pin thin QFN package
with an exposed paddle. Electrical performance is
guaranteed over a 0°C to +70°C temperature range.
 | MAX2034/MAX2035/MAX2037
EEPW Analog/Mixed-Signal IC Technical Innovation Award Winner 2006
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