MAX2036 Maxim Integrated Products, MAX2036 Datasheet

MAX2036

Manufacturer Part Number

MAX2036

Description

Ultrasound VGA Integrated

Manufacturer

Maxim Integrated Products

Datasheet

1.MAX2036.pdf (23 pages)

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Company:

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Part Number:

MAX2036CCQ+

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Part Number:

MAX2036CCQ+T

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The MAX2036 8-channel variable-gain amplifier (VGA)

and programmable octal mixer array is designed for

high linearity, high dynamic range, and low-noise per-

formance targeting ultrasound imaging and Doppler

applications. Each amplifier features differential inputs

and outputs and a total gain range of 50dB (typ). In

addition, the VGAs offer very low output-referred noise

performance suitable for interfacing with 10-bit ADCs.

The MAX2036 VGA is optimized for less than ±0.5dB

absolute gain error to ensure minimal channel-to-channel

ultrasound beamforming focus error. The device’s differ-

ential outputs are designed to directly drive ultrasound

ADCs through an external passive anti-aliasing filter. A

switchable clamp is also provided at each amplifier’s

output to limit the output signals, thereby preventing

ADC overdrive or saturation.

Dynamic performance of the device is optimized to

reduce distortion to support second-harmonic imaging.

The device achieves a second-harmonic distortion

specification of -62dBc at V

5MHz, and an ultrasound-specific* two-tone third-order

intermodulation distortion specification of -52dBc at

The MAX2036 also integrates an octal quadrature mixer

array and programmable LO phase generators for a

complete CW beamforming solution. The LO phase

selection for each channel can be programmed using a

digital serial interface and a single high-frequency

clock or the LOs for each complex mixer pair can be

directly driven using separate 4 x LO clocks. The serial

interface is designed to allow multiple devices to be

easily daisy-chained in order to minimize program inter-

face wiring. The LO phase dividers can be pro-

grammed to allow 4, 8, or 16 quadrature phases. The

input path of each CW mixer consists of a selectable

lowpass filter for optimal CWD noise performance. The

outputs of the mixers are summed into I and Q differen-

tial current outputs. The mixers and LO generators are

designed to have exceptionally low noise performance

of -155dBc/Hz at 1kHz offset from a 1.25MHz carrier.

The MAX2036 operates from a +5.0V power supply,

consuming only 120mW/channel in VGA mode and

269mW/channel in normal power CW mode. A low-

power CW mode is also available and consumes only

226mW/channel. The device is available in a lead-free

100-pin TQFP package (14mm x 14mm) with an

exposed pad. Electrical performance is guaranteed

over a 0°C to +70°C temperature range.

19-4420; Rev 0; 1/09

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

OUT

= 1.5V

Ultrasound Imaging

P-P

and f

________________________________________________________________ Maxim Integrated Products

General Description

= 5MHz.

OUT

Sonar

= 1.5V

Applications

P-P

and f

Ultrasound VGA Integrated

♦ 8-Channel Configuration

♦ High Integration for Ultrasound Imaging

♦ Pin Compatible with the MAX2035 Ultrasound

VGA Features

♦ Maximum Gain, Gain Range, and Output-Referred

♦ ±0.5dB Absolute Gain Error

♦ 120mW Consumption per Channel

♦ Switchable Output VGA Clamp Eliminating ADC

♦ Fully Differential VGA Outputs for Direct ADC

♦ Variable Gain Range Achieves 50dB Dynamic

♦ -62dBc HD2 at V

♦ Two-Tone Ultrasound-Specific* IMD3 of -52dBc at

CWD Mixer Features

♦ Low Mixer Noise of -155dBc/Hz at 1kHz Offset

♦ Serial-Programmable LO Phase Generator for 4, 8,

♦ Optional Individual Channel 4 x f

♦ 269mW Power Consumption per Channel (Normal

♦ CWD Implementation Is Fully Compliant with All

+ Denotes a lead(Pb)-free/RoHS-compliant package.

T = Tape-and-reel package.

D = Dry packing.

†

* See the Ultrasound-Specific IMD3 Specification in the

Applications Information section.

Pin Configuration appears at end of data sheet.

MAX2036CCQ+D

MAX2036CCQ+TD

EP = Exposed pad.

Applications

VGA

Noise Optimized for Interfacing with 10-Bit ADCs

Overdrive

Drive

Range

from 1.25MHz Carrier

16 LO Quadrature Phase Resolution

Drive Capability

Power Mode) and 226mW Power Consumption

per Channel (Low-Power Mode)

Patents Related to Ultrasound Imaging

Techniques

OUT

Maximum Gain of 39.5dB

Total Gain Range of 50dB

-60nV/ √ √ Hz Ultra-Low Output-Referred Noise at

5MHz

with CW Octal Mixer

PART

= 1.5V

P-P

and f

OUT

TEMP RANGE

Ordering Information

0°C to +70°C

= 1.5V

= 5MHz

P-P

and f

100 TQFP-EP †

PIN-PACKAGE

LO Input

Features

= 5MHz

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