MAX2037CCQ+ Maxim Integrated Products, MAX2037CCQ+ Datasheet

MAX2037CCQ+

Manufacturer Part Number

MAX2037CCQ+

Description

IC AMP VARIABLE GAIN 100-TQFP

Manufacturer

Maxim Integrated Products

Type

Variable Gain Amplifierr

Datasheet

1.MAX2037CCQT.pdf (13 pages)

Specifications of MAX2037CCQ+

Applications

Medical Ultrasound Imaging, Sonar

Mounting Type

Surface Mount

Package / Case

100-TQFP Exposed Pad, 100-eTQFP, 100-HTQFP, 100-VQFP

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

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The MAX2037 8-channel variable-gain amplifier (VGA)

is designed for high linearity, high dynamic range, and

low-noise performance targeting ultrasound imaging

and Doppler applications. Each amplifier features dif-

ferential inputs and outputs and a total gain range of

typically 42dB. In addition, the VGAs offer very low out-

put-referred noise performance suitable for interfacing

with 12-bit ADCs.

The MAX2037 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 ampli-

fier’s outputs to limit the output signals, thereby prevent-

ing 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 MAX2037 operates from a +5.0V power supply,

consuming only 120mW/channel. The device is avail-

able in a 100-pin TQFP package with an exposed pad.

Electrical performance is guaranteed over a 0°C to

+70°C temperature range.

19-0586; Rev 1; 2/09

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

VG_CTL+

VG_CTL-

P-P

VGIN1+

VGIN8+

VGIN1-

VGIN8-

•

and f

________________________________________________________________ Maxim Integrated Products

GND

VGA

•

General Description

= 5MHz.

-12.5dB TO +29.5dB

Functional Diagram

MAX2037

CIRCUITRY

EXT_RES

50Ω

BIAS

•

REF

OUT

Ultrasound Variable-Gain Amplifier

Sonar

= 1.5V

Applications

VG_CLAMP_MODE

VGOUT1+

VGOUT1-

VGOUT8+

VGOUT8-

•

P-P

and f

♦ 8-Channel Configuration

♦ High Integration for Ultrasound Imaging

♦ Pin Compatible with the MAX2038 Ultrasound

♦ Maximum Gain, Gain Range, and Output-Referred

♦ ±0.25dB Absolute Gain Error

♦ Switchable Output VGA Clamp Eliminating ADC

♦ Fully Differential VGA Outputs for Direct ADC

♦ Variable Gain Range Achieves 42dB Dynamic

♦ -70dBc HD2 at V

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

♦ 120mW Consumption Per Channel

* See the Ultrasound-Specific IMD3 Specification in the

Applications Information section.

†

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

T = Tape and reel.

D = Dry packing.

MAX2037CCQ+D

M AX 2037C C Q + TD

EP = Exposed pad.

Applications

VGA Plus CW Doppler Beamformer

Noise Optimized for Interfacing with 12-Bit ADCs

Overdrive

Drive

Range

OUT

Maximum Gain of 29.5dB

Total Gain Range of 42dB

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

5MHz

Pin-for-Pin 10-Bit Compatibility Supported By

MAX2035/MAX2036

PART

= 1.5V

P-P

and f

OUT

Ordering Information

0°C to +70°C

= 1.5V

RANGE

TEMP

= 5MHz

P-P

and f

PIN-PACKAGE

100 TQFP-EP †

Features

= 5MHz

Related parts for MAX2037CCQ+

MAX2037CCQ+ Summary of contents

Page 1

... HD2 at V ♦ Two-Tone Ultrasound-Specific* IMD3 of -52dBc at V OUT ♦ 120mW Consumption Per Channel Applications * See the Ultrasound-Specific IMD3 Specification in the Applications Information section. PART MAX2037CCQ 2037C VG_CLAMP_MODE † Exposed pad. + Denotes a lead(Pb)-free/RoHS-compliant package. VGOUT1 Tape and reel. VGOUT1 Dry packing. • ...

Page 2

Ultrasound Variable-Gain Amplifier ABSOLUTE MAXIMUM RATINGS GND .................................................-0.3V to +5.5V CC REF Any Other Pins to GND...............................-0. VGA Differential Input Voltage (VGIN_+ - VGIN_-)...........8.0V Analog Gain-Control Input Differential Voltage (VG_CTL+ - VG_CTL-)...................................................8.0V Continuous Power ...

Page 3

Ultrasound Variable-Gain Amplifier AC ELECTRICAL CHARACTERISTICS (Figure 4.75V to 5.25V REF 5MHz, capacitance to GND at each of the VGA differential outputs is 60pF, differential capacitance across the VGA outputs is 10pF, R ...

Page 4

Ultrasound Variable-Gain Amplifier AC ELECTRICAL CHARACTERISTICS (continued) (Figure 4.75V to 5.25V REF 5MHz, capacitance to GND at each of the VGA differential outputs is 60pF, differential capacitance across the VGA outputs is 10pF, ...

Page 5

Ultrasound Variable-Gain Amplifier (Figure 4.75V to 5.25V REF VGA differential outputs is 60pF, differential capacitance across the VGA outputs is 10pF, R values are 5V +25°C, ...

Page 6

Ultrasound Variable-Gain Amplifier (Figure 4.75V to 5.25V REF VGA differential outputs is 60pF, differential capacitance across the VGA outputs is 10pF, R values are 5V +25°C, ...

Page 7

Ultrasound Variable-Gain Amplifier (Figure 4.75V to 5.25V REF VGA differential outputs is 60pF, differential capacitance across the VGA outputs is 10pF, R values are 5V +25°C, ...

Page 8

Ultrasound Variable-Gain Amplifier PIN NAME 10, 11, 12, 19, 20, 21, 24, 25, 26, 29, 30, 31, 34, 35, 36, 41, 43, 44, 45, 47, 48, GND 51, 55, 58, 59, 64, 65, 66, 69, ...

Page 9

Ultrasound Variable-Gain Amplifier PIN NAME 61 VGOUT5- 62 VG_CTL- 63 VG_CTL+ 67 VGOUT4+ 68 VGOUT4- 70 VGOUT3+ 71 VGOUT3- 74 VGOUT2+ 75 VGOUT2- 77 VGOUT1+ 78 VGOUT1 G_C LAMP VGIN1- 95 VGIN1+ 99 VGIN2- ...

Page 10

Ultrasound Variable-Gain Amplifier Applications Information External Compensation External compensation is required for bypassing inter- nal biasing circuitry. Connect, as close as possible, individual 4.7µF capacitors from each pin EXT_C1, EXT_C2, and EXT_C3 (pin 13, 14, 15) to ground. External Bias ...

Page 11

Ultrasound Variable-Gain Amplifier SINGLE CHANNEL MAX2034 +V 18nF 100nF V IN 100nF -V Figure 2. Typical Per-Channel Ultrasound-Imaging Application TOP VIEW GND 1 GND 2 VGIN3- 3 VGIN3+ 4 GND 5 GND 6 GND 7 VGIN4- 8 VGIN4+ 9 GND ...

Page 12

Ultrasound Variable-Gain Amplifier Chip Information PROCESS: Silicon Complementary Bipolar 12 ______________________________________________________________________________________ Package Information For the latest package outline information and land patterns www.maxim-ic.com/packages. PACKAGE TYPE PACKAGE CODE 100 TQFP-EP C100E+3 DOCUMENT NO. 21-0116 ...

Page 13

... 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. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 13 © 2009 Maxim Integrated Products DESCRIPTION Maxim is a registered trademark of Maxim Integrated Products, Inc ...

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