MAX2078CTK+ Maxim Integrated Products, MAX2078CTK+ Datasheet

MAX2078CTK+

Manufacturer Part Number

MAX2078CTK+

Description

IC FRNT-END ULTRASOUND 8CH 68QFN

Manufacturer

Maxim Integrated Products

Type

Ultrasound Receiversr

Datasheet

1.MAX2078CTK.pdf (26 pages)

Specifications of MAX2078CTK+

Applications

Medical Ultrasound Imaging, Sonar

Mounting Type

Surface Mount

Package / Case

68-TQFN Exposed Pad

Operating Supply Voltage

3.13 V to 3.47 V

Maximum Operating Temperature

+ 70 C

Mounting Style

SMD/SMT

Minimum Operating Temperature

0 C

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

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The MAX2078 octal-channel ultrasound front-end is a

fully integrated bipolar, high-density octal-channel ultra-

sound receiver optimized for low cost, high-channel

count, high-performance portable and cart-based ultra-

sound systems. The easy-to-use IC allows the user to

achieve high-end 2D, PW, and CW Doppler (CWD)

imaging capability using substantially less space and

power. The highly compact imaging receiver lineup,

including low-noise amplifier (LNA), variable-gain

amplifier (VGA), and anti-alias filter (AAF), achieves an

ultra-low 2.4dB noise figure at R

very low 64.8mW per channel power dissipation. The

full imaging receiver channel has been optimized for

second-harmonic imaging with -64dBFS second-har-

monic distortion performance with a 1V

signal. The bipolar front-end has also been optimized

for excellent low-velocity PW and color-flow Doppler

sensitivity with an exceptional near-carrier SNR of

140dBc/Hz at 1kHz offset from a 5MHz 1V

clutter signal.

A fully integrated high-performance, programmable

CWD beamformer is also included. Separate I/Q mixers

for each channel are available for optimal CWD sensi-

tivity in high-clutter environments, yielding an impres-

sive near-carrier SNR of 154dBc/Hz at 1kHz offset from

a 1.25MHz 200mV

The MAX2078 octal-channel ultrasound front-end is

available in a small 10mm x 10mm, 68-pin thin QFN

package with an exposed pad and is specified over a

0°C to +70°C temperature range.

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

* EP = Exposed pad.

19-4570; Rev 1; 10/09

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.

MAX2078CTK+

PART

Medical Ultrasound Imaging

Sonar

________________________________________________________________ Maxim Integrated Products

P-P

input clutter signal.

Ordering Information

TEMP RANGE

0°C to +70°C

General Description

Octal-Channel Ultrasound Front-End

Applications

= R

P-P

68 Thin QFN-EP*

PIN-PACKAGE

= 200Ω at a

5MHz output

P-P

output

with CW Doppler Mixers

o 8 Full Channels of LNA, VGA, AAF, and CWD

o Pin Compatible with MAX2077 with LNA, VGA,

o Ultra-Low Full-Channel Noise Figure of 2.4dB at

o Low Output-Referred Noise of 23nV/√ Hz at 5MHz,

o High Near-Carrier SNR of 140dBc/Hz at 1kHz

o Ultra-Low-Power 64.8mW per Full-Channel (LNA,

o Selectable Active Input-Impedance Matching of

o Wide Input-Voltage Range of 330mV

o Integrated Selectable 3-Pole 9MHz, 10MHz,

o Fast-Recovery, Low-Power Modes (< 2µs)

o Fully Integrated, High Dynamic Range CWD

** When coupled with the MAX1437B ADC.

Mixers in a Small, 10mm x 10mm TQFN Package

and AAF in 10mm x 10mm TQFN Variant

20dB Gain, Yielding a Broadband SNR of 68dB**

for Excellent Second-Harmonic Imaging

Offset from a 5MHz, 1V

20dB of Gain for Excellent Low-Velocity PW and

Color-Flow Doppler Sensitivity in a High-Clutter

Environment

VGA, and AAF) Normal Imaging Mode (234mW per

Channel in CWD Mode)

50Ω, 100Ω, 200Ω, and 1kΩ

Gain Mode and 550mV

15MHz, and 18MHz Butterworth AAF

Beamformer with Near-Carrier SNR of 154dBc/Hz

at 1kHz Offset from a 1.25MHz, 200mV

Clutter Signal

TOP VIEW

= R

*EP = EXPOSED PAD.

INC2

INC3

INC4

INC5

INC6

GND

IN2

ZF3

IN3

ZF4

IN4

ZF5

IN5

ZF6

IN6

ZF7 17

= 200Ω

*EP

P-P

THIN QFN

MAX2078

P-P

Pin Configuration

in Low LNA Gain Mode

Output Signal, and

P-P

Features

P-P

in High LNA

Input

50 OUT2+

48 OUT3+

37 OUT7+

OUT1-

OUT2-

OUT3-

OUT4+

OUT4-

LO+

LO-

OUT5+

OUT5-

OUT6+

OUT6-

OUT7-

OUT8+

CC1

Related parts for MAX2078CTK+

MAX2078CTK+ Summary of contents

Page 1

... Medical Ultrasound Imaging Sonar Ordering Information PART TEMP RANGE MAX2078CTK+ 0°C to +70°C + Denotes a lead(Pb)-free/RoHS-compliant package Exposed pad. ________________________________________________________________ Maxim Integrated Products 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. ...

Page 2

Octal-Channel Ultrasound Front-End with CW Doppler Mixers ABSOLUTE MAXIMUM RATINGS V to GND .........................................................-0.3V to +5.5V CC_ ......................................................................> -0.3V CC2 CC1 CI_, CQ_ to GND ....................................................-0.3V to +13V ZF_, IN_ GND ................................-0. INC_ ...

Page 3

Octal-Channel Ultrasound Front-End DC ELECTRICAL CHARACTERISTICS—VGA MODE (continued) ( Typical Application Circuit , V = 2.475V to 2.525V, V REF V CLP = signals applied. Typical values are at ...

Page 4

Octal-Channel Ultrasound Front-End with CW Doppler Mixers AC ELECTRICAL CHARACTERISTICS ( Typical Application Circuit , V = 2.475V to 2.525V, V REF D43/D42/D41/D40 = 1/0/1/0 (R capacitance to GND at each of the VGA ...

Page 5

Octal-Channel Ultrasound Front-End AC ELECTRICAL CHARACTERISTICS—VGA MODE (continued) ( Typical Application Circuit , V = 2.475V to 2.525V, V REF V D43/D42/D41/D40 = 1/0/1/0 (R capacitance to GND at each of the ...

Page 6

Octal-Channel Ultrasound Front-End with CW Doppler Mixers AC ELECTRICAL CHARACTERISTICS—VGA MODE (continued) ( Typical Application Circuit , V = 2.475V to 2.525V, V REF V D43/D42/D41/D40 = 1/0/1/0 (R capacitance to GND ...

Page 7

Octal-Channel Ultrasound Front-End AC ELECTRICAL CHARACTERISTICS—CW MODE (continued) ( Typical Application Circuit , V CLP = 0, D43/D42/D41/D40 = 1/0/1 /16 = 5MHz 200Ω, CI_, CQ_ pulled up ...

Page 8

Octal-Channel Ultrasound Front-End with CW Doppler Mixers AC ELECTRICAL CHARACTERISTICS—SERIAL PERIPHERAL INTERFACE (DOUT loaded with 60pF and 10MΩ, 2ns rise and fall edges on CLK.) PARAMETER SYMBOL Clock Speed Mininimum Data-to-Clock Setup Time Mininimum Data-to-Clock Hold Time Mininimum Clock-to-CS Setup ...

Page 9

Octal-Channel Ultrasound Front-End ( Typical Application Circuit , V = 2.475V to 2.525V, V REF CLP = 0, D43/D42/D41/D40 = 1/0/1 5MHz, capacitance to GND at each of the VGA differential outputs ...

Page 10

Octal-Channel Ultrasound Front-End with CW Doppler Mixers ( Typical Application Circuit , V = 2.475V to 2.525V, V REF CLP = 0, D43/D42/D41/D40 = 1/0/1 5MHz, capacitance to GND at each of ...

Page 11

Octal-Channel Ultrasound Front-End ( Typical Application Circuit , V = 2.475V to 2.525V, V REF CLP = 0, D43/D42/D41/D40 = 1/0/1 5MHz, capacitance to GND at each of the VGA differential outputs ...

Page 12

Octal-Channel Ultrasound Front-End with CW Doppler Mixers ( Typical Application Circuit , V = 2.475V to 2.525V, V REF CLP = 0, D43/D42/D41/D40 = 1/0/1 5MHz, capacitance to GND at each of ...

Page 13

Octal-Channel Ultrasound Front-End PIN NAME 1 IN2 Channel 2 Input 2 INC2 C hannel Inp ut. C onnect to a coup cap aci tor . S ee the Typ i cal Ap ...

Page 14

Octal-Channel Ultrasound Front-End with CW Doppler Mixers PIN NAME 37 OUT7+ Channel 7 Positive Differential Output 38 OUT6- Channel 6 Negative Differential Output 39 OUT6+ Channel 6 Positive Differential Output 40 OUT5- Channel 5 Negative Differential Output 41 OUT5+ Channel ...

Page 15

Octal-Channel Ultrasound Front-End MAX2078 V CC1 V CC2 ZF1 IN1 INC1 LNA ZF2 IN2 INC2 LNA ZF3 IN3 INC3 LNA ZF4 IN4 INC4 LNA GND ZF5 AG IN5 INC5 LNA ZF6 IN6 INC6 LNA ZF7 IN7 INC7 LNA ZF8 IN8 ...

Page 16

Octal-Channel Ultrasound Front-End with CW Doppler Mixers Detailed Description The MAX2078 is a high-density, octal-channel ultra- sound receiver optimized for low cost, high-channel count, high-performance portable and cart-based ultra- sound applications. The integrated octal LNA, VGA, AAF, and programmable CWD ...

Page 17

Octal-Channel Ultrasound Front-End Low-Noise Amplifier (LNA) The MAX2078’s LNA is optimized for excellent dynamic range and linearity performance characteristics, making it ideal for ultrasound imaging applications. When the LNA is placed in low-gain mode, the input resistance (R being a ...

Page 18

Octal-Channel Ultrasound Front-End with CW Doppler Mixers Each mixer can be programmed phases; therefore, 4 bits are required for each channel for pro- gramming. Each CW channel can be programmed to an off state by setting ...

Page 19

Octal-Channel Ultrasound Front-End VGA and CW Mixer Operation During normal operation, the MAX2078 is configured so that either the VGA path is enabled while the mixer array is powered down (VGA mode), or the quadrature mixer array is enabled while ...

Page 20

Octal-Channel Ultrasound Front-End with CW Doppler Mixers If drawn, the simplified dominant highpass network would look like Figure 3. The highpass pole in this case 5Hz. Note that this low highpass corner frequency is required to ...

Page 21

Octal-Channel Ultrasound Front-End Table 5. Programming Bit Order MSB D46 D45 D44 D43 D42 D41 D40 D46 D45 D44 D43 D42 D41 D40 DIN CLK t ...

Page 22

Octal-Channel Ultrasound Front-End with CW Doppler Mixers Ultrasound Front-End CWD Beamformer The user provides an LO frequency of 16MHz to 120MHz. This high clock frequency requires a differential LVDS input. Note that the LVDS CWD LO clocks are DC- coupled. ...

Page 23

Octal-Channel Ultrasound Front-End Ultrasound-Specific IMD3 Specification Unlike typical communications applications, the two input tones are not equal in magnitude for the ultra- sound-specific IMD3 two-tone specification. In this measurement, f represents reflections from tissue and 1 f represents reflections from ...

Page 24

Octal-Channel Ultrasound Front-End with CW Doppler Mixers IN1 C39 C38 10nF 10nF C1 22nF IN2 1 + INC2 IN2 2 C2 10nF ZF3 3 C3 22nF IN3 IN3 4 INC3 5 C4 10nF ZF4 6 C5 22nF ...

Page 25

Octal-Channel Ultrasound Front-End Chip Information PROCESS: Complementary BiCMOS ______________________________________________________________________________________ with CW Doppler Mixers Package Information For the latest package outline information and land patterns www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS ...

Page 26

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 26 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2009 Maxim Integrated Products DESCRIPTION Maxim is a registered trademark of Maxim Integrated Products, Inc ...

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