MAX2038 Maxim Integrated Products, MAX2038 Datasheet

MAX2038

Manufacturer Part Number

MAX2038

Description

Ultrasound VGA Integrated

Manufacturer

Maxim Integrated Products

Datasheet

1.MAX2038.pdf (23 pages)

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Manufacturer

Quantity

Price

Company:

BOSTOCK HK LIMITED

Part Number:

MAX2038CCQ+

Manufacturer:

Maxim Integrated

Quantity:

10 000

Company:

BOSTOCK HK LIMITED

Part Number:

MAX2038CCQ+T

Manufacturer:

Maxim Integrated

Quantity:

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The MAX2038 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 42dB (typ). In

addition, the VGAs offer very low output-referred noise

performance suitable for interfacing with 12-bit ADCs.

The MAX2038 VGA is optimized for less than ±0.25dB

absolute gain error to ensure minimal channel-to-chan-

nel ultrasound beamforming focus error. The device’s

differential outputs are designed to directly drive ultra-

sound 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 -70dBc at V

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

intermodulation distortion specification of -52dBc at

The MAX2038 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 to minimize program interface wiring. The LO

phase dividers can be programmed 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 differential current outputs. The

mixers and LO generators are designed to have excep-

tionally low noise performance of -155dBc/Hz at 1kHz

offset from a 1.25MHz carrier.

The MAX2038 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 x 1mm) with an

exposed pad. Electrical performance is guaranteed

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

19-4375; 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

= 5MHz.

General Description

OUT

Sonar

= 1.5V

Applications

P-P

and f

Ultrasound VGA Integrated

o 8-Channel Configuration

o High Integration for Ultrasound Imaging

o Pin Compatible with the MAX2037 Ultrasound VGA

VGA Features

o Maximum Gain, Gain Range, and Output-Referred

o ±0.25dB Absolute Gain Error

o 120mW Consumption per Channel

o Switchable Output VGA Clamp Eliminating ADC

o Fully Differential VGA Outputs for Direct ADC

o Variable Gain Range Achieves 42dB Dynamic

o -70dBc HD2 at V

o Two-Tone Ultrasound-Specific* IMD3 of

CW Doppler Mixer Features

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

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

o Optional Individual Channel 4 x f

o 269mW Power Consumption per Channel (Normal

o CWD Implementation Is Fully Compliant with All

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

D = Dry packing.

T = Tape and reel.

* EP = Exposed pad.

* See the Ultrasound-Specific IMD3 Specification in the

Applications Information section.

Pin Configuration appears at end of data sheet.

MAX2038CCQ+D

MAX2038CCQ+TD

Applications

Noise Optimized for Interfacing with 12-Bit ADCs

Overdrive

Drive

Range

-52dBc at V

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

Maximum Gain of 29.5dB

Total Gain Range of 42dB

22nV/ √ √ Hz Ultra-Low Output-Referred Noise at

5MHz

with CW Octal Mixer

PART

OUT

= 1.5V

OUT

Ordering Information

TEMP RANGE

0°C to +70°C

= 1.5V

P-P

and f

P-P

www.DataSheet4U.com

and f

= 5MHz

PIN-PACKAGE

100 TQFP-EP*

LO Input

Features

= 5MHz

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