Datasheet
General Description
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 match-
ing, which is necessary for high-performance ultra-
sound-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 match-
ing. 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 per-
formance 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-spe-
cific* two-tone third-order intermodulation distortion per-
formance 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 con-
ditions typically found in ultrasound input-buffer imag-
ing applications.
The MAX2034 is available in a 48-pin thin QFN pack-
age with an exposed paddle. Electrical performance is
guaranteed over a 0°C to +70°C temperature range.
Features
♦ High-Level Integration of 4 Channels
♦ Digitally Programmable Input Impedance (R
IN
) of
50Ω, 100Ω, 200Ω, and 1kΩ
♦ Integrated Input Clamp
♦ Integrated Input-Damping Capacitor
♦ Ultra-Low 2.2dB Noise Figure at R
S
= R
IN
= 200Ω
♦ 70MHz, -3dB Bandwidth
♦ Low 58mW/Channel Power Dissipation
♦ HD2 of -68dBc at V
OUT
= 1V
P-P
and f
IN
= 5MHz for
Exceptional Second Harmonic Imaging
Performance
♦ Two-Tone Ultrasound-Specific* IMD3 of -55dBc at
V
OUT
= 1V
P-P
and f
IN
= 5MHz for Exceptional
PW/CW Doppler Performance
♦ Quick Large-Signal Overload Recovery
♦ Single +5V Supply Operation
♦ Sleep Mode
MAX2034
Quad-Channel, Ultra-Low-Noise Amplifier with
Digitally Programmable Input Impedance
________________________________________________________________ Maxim Integrated Products 1
TOP VIEW
MAX2034
THIN QFN
13
14
15
16
17
18
19
20
21
22
23
24
INC4
INB4
GND
V
CC
V
CC
D1
D0
V
CC
GND
GND
OUT4-
OUT4+
48
47
46
45
44
43
42
41
40
39
38
37
1
2
345678910
11
12
IN1
ZF1
GND
V
CC
V
CC
PD
D2
V
CC
GND
GND
V
CC
GND
IN4
ZF4
INB3
INC3
IN3
ZF3
INB2
INC2
IN2
ZF2
INB1
INC1
36
35
34 33 32 31 30 29 28 27
26
25
GND
GND
V
CC
OUT3-
OUT3+
V
CC
OUT2-
OUT2+
GND
V
CC
OUT1-
OUT1+
Pin Configuration
19-3969; Rev 1; 3/07
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
PART
TEMP
RANGE
PIN-
PACKAGE
PKG
CODE
MAX2034CTM+
0°C to +70°C
48 Thin QFN-EP**
(7mm x 7mm)
T4877-4
MAX2034CTM
0°C to +70°C
48 Thin QFN-EP**
(7mm x 7mm)
T4877-4
MAX2034CTM+T
0°C to +70°C
48 Thin QFN-EP**
(7mm x 7mm)
T4877-4
MAX2034CTM-T
0°C to +70°C
48 Thin QFN-EP**
(7mm x 7mm)
T4877-4
Ordering Information
**EP = Exposed paddle.
+Denotes lead-free package.
T = Tape-and-reel package.
*See the Ultrasound-Specific IMD3 Specification in the
Applications Information section.
Typical Application Circuit appears at end of data sheet.
Applications
Ultrasound Imaging
Sonar Signal Amplification