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MAX2078
Octal-Channel Ultrasound Front-End with CW Doppler Mixers
Breakthrough Levels of Performance for High-Channel Count Cart-Based and Portable Ultrasound Imaging Equipment
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Status
Active: In Production.
Description
The MAX2078 octal-channel ultrasound front-end is a fully integrated bipolar, high-density octal-channel ultrasound receiver optimized for low cost, high-channel count, high-performance portable and cart-based ultrasound 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 RS = RIN = 200Ω at a very low 64.8mW per channel power dissipation. The full imaging receiver channel has been optimized for second-harmonic imaging with -64dBFS second-harmonic distortion performance with a 1VP-P 5MHz output 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 1VP-P output 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 sensitivity in high-clutter environments, yielding an impressive near-carrier SNR of 154dBc/Hz at 1kHz offset from a 1.25MHz 200mVP-P input clutter signal.
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.
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Data Sheet
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Key Features
- 8 Full Channels of LNA, VGA, AAF, and CWD Mixers in a Small, 10mm x 10mm TQFN Package
- Pin Compatible with MAX2077 with LNA, VGA, and AAF in 10mm x 10mm TQFN Variant
- Ultra-Low Full-Channel Noise Figure of 2.4dB at RIN = RS = 200Ω
- Low Output-Referred Noise of 23nV/
 at 5MHz, 20dB Gain, Yielding a Broadband SNR of 68dB** for Excellent Second-Harmonic Imaging
- High Near-Carrier SNR of 140dBc/Hz at 1kHz Offset from a 5MHz, 1VP-P Output Signal, and 20dB of Gain for Excellent Low-Velocity PW and Color-Flow Doppler Sensitivity in a High-Clutter Environment
- Ultra-Low-Power 64.8mW per Full-Channel (LNA, VGA, and AAF) Normal Imaging Mode (234mW per Channel in CWD Mode)
- Selectable Active Input-Impedance Matching of 50Ω, 100Ω, 200Ω, and 1kΩ
- Wide Input-Voltage Range of 330mVP-P in High LNA Gain Mode and 550mVP-P in Low LNA Gain Mode
- Integrated Selectable 3-Pole 9MHz, 10MHz, 15MHz, and 18MHz Butterworth AAF
- Fast-Recovery, Low-Power Modes (< 2µs)
- Fully Integrated, High Dynamic Range CWD Beamformer with Near-Carrier SNR of 154dBc/Hz at 1kHz Offset from a 1.25MHz, 200mVP-P Input Clutter Signal
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Applications/Uses
- Medical Ultrasound Imaging
- Sonar
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Key Specifications:
| Ultrasound Analog Front-Ends |
| Part Number |
Resolution
(bits) |
Power Dissipation
(mW/Ch) |
Noise Figure
(dB) |
Gain Control Range
(±V) |
Gain Range
(dB) |
HD2
(dBc) |
Channels |
LNA Gain
(dB) |
Active Input Impedence
(Ω) |
Package/Pins |
Smallest Available Pckg.
(mm2) |
Oper. Temp.
(°C) |
Budgetary Price |
| typ |
typ |
max w/pins |
See Notes |
| MAX2078 |
12 |
64.8 |
2.4 |
3 |
33 |
-67 |
8 |
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102 |
0 to +70 |
$47.50 @1k |
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See All Ultrasound Analog Front-Ends (3)
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Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
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| **When coupled with the MAX1437B ADC. |
Diagram
More detailed image
Typical Application Circuit
More Information
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Document Ref.: 19-4570
Rev 2;
2011-10-11
This page last modified: 2011-10-13
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