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

cific* two-tone third-order intermodulation distortion per-

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

50Ω, 100Ω, 200Ω, and 1kΩ

♦ Integrated Input Clamp

♦ Integrated Input-Damping Capacitor

♦ 70MHz, -3dB Bandwidth

♦ Low 58mW/Channel Power Dissipation

Exceptional Second Harmonic Imaging

Performance

♦ Two-Tone Ultrasound-Specific* IMD3 of -55dBc at

PW/CW Doppler Performance

♦ Quick Large-Signal Overload Recovery

♦ Single +5V Supply Operation

♦ Sleep Mode

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

D1

D0

GND

GND

OUT4-

OUT4+

48

47

46

45

44

43

42

41

40

39

38

37

1

2

3

4567

89

10

11

12

IN1

ZF1

GND

PD

D2

GND

GND

GND

36

35

34

33

32

31

30

29

28

27

26

25

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