MAX2038CCQ+D

MAX2038CCQ+D Datasheet

MAX2038

Part	Datasheet
MAX2038CCQ+D	MAX2038CCQ+D (pdf)

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Ultrasound VGA Integrated with CW Octal Mixer MAX2038 The MAX2038 8-channel variable-gain amplifier VGA and programmable octal mixer array is designed for high linearity, high dynamic range, and low noise performance 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-channel ultrasound beamforming focus error. The device’s differential 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 -70dBc at VOUT = 1.5VP-P and fIN = 5MHz and an ultrasound-specific, two-tone, third-order intermodulation distortion specification of -52dBc at VOUT = 1.5VP-P and fIN = 5MHz. 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 exceptionally 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 lowpower 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. Ultrasound Imaging Sonar o 8-Channel Configuration o High Integration for Ultrasound Imaging Applications o Pin Compatible with the MAX2037 Ultrasound VGA VGA Features o Maximum Gain, Gain Range, and Output-Referred Noise Optimized for Interfacing with 12-Bit ADCs Maximum Gain of 29.5dB Total Gain Range of 42dB Ultra-Low Output-Referred Noise at 5MHz o ±0.25dB Absolute Gain Error o 120mW Consumption per Channel o Switchable Output VGA Clamp Eliminating ADC Overdrive o Fully Differential VGA Outputs for Direct ADC Drive o Variable Gain Range Achieves 42dB Dynamic Range o -70dBc HD2 at VOUT = 1.5VP-P and fIN = 5MHz o Two-Tone Ultrasound-Specific IMD3 of -52dBc at VOUT = 1.5VP-P and fIN = 5MHz CW Doppler Mixer Features o Low Mixer Noise of -155dBc/Hz at 1kHz Offset from 1.25MHz Carrier o Serial-Programmable LO Phase Generator for 4, 8, 16 LO Quadrature Phase Resolution o Optional Individual Channel 4 x fLO LO Input Drive Capability o 269mW Power Consumption per Channel Normal Power Mode and 226mW Power Consumption per Channel Low-Power Mode Ordering Information PART TEMP RANGE PIN-PACKAGE MAX2038CCQ+D 0°C to +70°C 100 TQFP-EP* MAX2038CCQ+TD 0°C to +70°C 100 TQFP-EP* +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. Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at MAX2038 Ultrasound VGA Integrated with CW Octal Mixer ABSOLUTE MAXIMUM RATINGS VCC, VREF to GND to +5.5V Any Other Pins to GND...............................-0.3V to VCC + 0.3V CW Mixer Output Voltage to GND CW_IOUT+, CW_IOUT-, CW_QOUT+, CW_QOUT- VGA Differential Input Voltage VGIN_+, VGIN_- ............8.0VP-P Analog Gain Control Differential Input Voltage VG_CTL+, VG_CTL- CW Mixer Differential Input Voltage CWIN_+, CW Mixer LVDS LO Differential Input Voltage..................8.0VP-P Continuous Power Dissipation TA = +70°C 100-Pin TQFP derated 45.5mW/°C above +70°C ...3636.4mW Operating Temperature Range...............................0°C to +70°C Junction Temperature Note 1 Note 1 Storage Temperature Range .............................-40°C to +150°C Lead Temperature soldering, 10s .................................+300°C Soldering Temperature reflow Note 1 Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a fourlayer board. For detailed information on package thermal considerations, refer to Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. DC ELECTRICAL MODE Typical Application Circuit, Figure VCC = VREF = 4.75V to 5.25V, VCM = 3/5 VREF, TA = 0°C to +70°C, VGND = 0V, LOW_PWR = 0, M4_EN = 0, CW_FILTER = 0 or 1, TEST_MODE = 0, PD = 0, CW_VG = 1, CW_M1 = 0, CW_M2 = 0, no RF signals applied, capacitance to GND at each of the VGA differential outputs is 60pF, differential capacitance across the VGA outputs is 10pF, RL = 1kΩ, CW mixer outputs pulled up to +11V through four separate 115Ω resistors, all CW channels programmed off. Typical values are at VCC = VREF = 5V, TA = +25°C, unless otherwise noted. Note 2 PARAMETER VGA MODE Supply Voltage Range VCC External Reference Total Power-Supply Current VCC Supply Current VREF Current Consumption per Amplifier Channel CONDTIONS VCC VREF IVCC IREF Note 3 Refers to VCC supply current plus VREF current PD = 0 PD = 1 Refers to VCC supply current MIN TYP MAX UNITS 204 231 192 216 Differential Analog Control Voltage Range Minimum gain Maximum gain VP-P Differential Analog Control Common-Mode Voltage Analog Control Input Source/Sink Current LOGIC INPUTS CMOS Input High Voltage CMOS Input Low Voltage MAX2038

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Ultrasound VGA Integrated with CW Octal Mixer

MAX2038

The MAX2038 8-channel variable-gain amplifier VGA and programmable octal mixer array is designed for high linearity, high dynamic range, and low noise performance 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-channel ultrasound beamforming focus error. The device’s differential 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 -70dBc at VOUT = 1.5VP-P and fIN = 5MHz and an ultrasound-specific*, two-tone, third-order intermodulation distortion specification of -52dBc at VOUT = 1.5VP-P and fIN = 5MHz.

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 exceptionally 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 lowpower 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.

Ultrasound Imaging

Sonar
o 8-Channel Configuration o High Integration for Ultrasound Imaging

Applications o Pin Compatible with the MAX2037 Ultrasound VGA

VGA Features o Maximum Gain, Gain Range, and Output-Referred

Noise Optimized for Interfacing with 12-Bit ADCs

Maximum Gain of 29.5dB

Total Gain Range of 42dB Ultra-Low Output-Referred Noise at 5MHz o ±0.25dB Absolute Gain Error o 120mW Consumption per Channel o Switchable Output VGA Clamp Eliminating ADC Overdrive o Fully Differential VGA Outputs for Direct ADC Drive o Variable Gain Range Achieves 42dB Dynamic Range o -70dBc HD2 at VOUT = 1.5VP-P and fIN = 5MHz o Two-Tone Ultrasound-Specific* IMD3 of -52dBc at VOUT = 1.5VP-P and fIN = 5MHz

CW Doppler Mixer Features o Low Mixer Noise of -155dBc/Hz at 1kHz Offset
from 1.25MHz Carrier o Serial-Programmable LO Phase Generator for 4, 8,
16 LO Quadrature Phase Resolution o Optional Individual Channel 4 x fLO LO Input

Drive Capability o 269mW Power Consumption per Channel Normal

Power Mode and 226mW Power Consumption per Channel Low-Power Mode
Ordering Information

PART

TEMP RANGE PIN-PACKAGE

MAX2038CCQ+D
0°C to +70°C 100 TQFP-EP*

MAX2038CCQ+TD
0°C to +70°C 100 TQFP-EP*
+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.

Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at

MAX2038

Ultrasound VGA Integrated with CW Octal Mixer

ABSOLUTE MAXIMUM RATINGS

VCC, VREF to GND to +5.5V Any Other Pins to GND...............................-0.3V to VCC + 0.3V CW Mixer Output Voltage to GND CW_IOUT+, CW_IOUT-,

CW_QOUT+, CW_QOUT-

VGA Differential Input Voltage VGIN_+, VGIN_- ............8.0VP-P Analog Gain Control Differential Input Voltage

VG_CTL+, VG_CTL- CW Mixer Differential Input Voltage

CWIN_+,

CW Mixer LVDS LO Differential Input Voltage..................8.0VP-P Continuous Power Dissipation TA = +70°C
100-Pin TQFP derated 45.5mW/°C above +70°C ...3636.4mW

Operating Temperature Range...............................0°C to +70°C

Junction Temperature Note 1 Note 1 Storage Temperature Range .............................-40°C to +150°C

Lead Temperature soldering, 10s .................................+300°C

Soldering Temperature reflow

Note 1 Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a fourlayer board. For detailed information on package thermal considerations, refer to

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

DC ELECTRICAL MODE

Typical Application Circuit, Figure VCC = VREF = 4.75V to 5.25V, VCM = 3/5 VREF, TA = 0°C to +70°C, VGND = 0V, LOW_PWR = 0, M4_EN = 0, CW_FILTER = 0 or 1, TEST_MODE = 0, PD = 0, CW_VG = 1, CW_M1 = 0, CW_M2 = 0, no RF signals applied, capacitance to GND at each of the VGA differential outputs is 60pF, differential capacitance across the VGA outputs is 10pF, RL = 1kΩ, CW mixer outputs pulled up to +11V through four separate 115Ω resistors, all CW channels programmed off. Typical values are at VCC = VREF = 5V, TA = +25°C, unless otherwise noted. Note 2

PARAMETER VGA MODE Supply Voltage Range VCC External Reference

Total Power-Supply Current

VCC Supply Current VREF Current Consumption per Amplifier Channel

CONDTIONS

VCC VREF

IVCC IREF

Note 3

Refers to VCC supply current plus VREF current

PD = 0 PD = 1

Refers to VCC supply current

MIN TYP MAX UNITS
204 231
192 216

Differential Analog Control Voltage Range

Minimum gain Maximum gain

VP-P

Differential Analog Control Common-Mode Voltage

Analog Control Input Source/Sink Current

LOGIC INPUTS

CMOS Input High Voltage

CMOS Input Low Voltage

MAX2038

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Datasheet ID: MAX2038CCQ+D 647273