MAX2077 Datasheet, PDF (1/19 Pages) Maxim Integrated Products – Octal-Channel Ultrasound Front-End

19-4696; Rev 0; 7/09
Octal-Channel Ultrasound Front-End
General Description
The MAX2077 octal-channel ultrasound front-end is a
fully integrated, bipolar, high-density, octal-channel
ultrasound receiver optimized for low-cost, high-chan-
nel count, high-performance portable and cart-based
ultrasound systems. The easy-to-use IC allows the user
to achieve high-end 2D and PW imaging capability
using substantially less space and power. The highly
compact imaging receiver lineup, including a low-noise
amplifier (LNA), variable-gain amplifier (VGA), and anti-
alias filter (AAF), achieves an ultra-low 2.4dB noise fig-
ure at R_S = R_IN = 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 per-
formance with a 1V_P-P 5MHz output signal and broad-
band SNR of > 68dB* at 20dB gain. 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 off-
set from a 5MHz 1V_P-P output clutter signal.
The MAX2077 octal-channel ultrasound front-end is
available in a small 8mm x 8mm, 56-pin thin QFN or
10mm x 10mm, 68-pin thin QFN package with an
exposed pad and is specified over a 0°C to +70°C tem-
perature range. To add CW Doppler capability, replace
the MAX2077 with the MAX2078.
Applications
Medical Ultrasound Imaging
Sonar
Pin Configurations and Typical Application Circuits appear
at end of data sheet.
Features
o 8 Full Channels of LNA, VGA, and AAF in a Small,
8mm x 8mm, 56-Pin or 10mm x 10mm, 68-Pin
TQFN Package
o Ultra-Low Full-Channel Noise Figure of 2.4dB at
R_IN = R_S = 200Ω
o Low Output-Referred Noise of 23nV/√Hz at 5MHz,
20dB Gain, Yielding a Broadband SNR of 68dB*
for Excellent Second-Harmonic Imaging
o High Near-Carrier SNR of 140dBc/Hz at 1kHz
Offset from a 5MHz, 1V_P-P Output Signal, and
20dB of Gain for Excellent Low-Velocity PW and
Color-Flow Doppler Sensitivity in a High-Clutter
Environment
o Ultra-Low Power 64.8mW per Full-Channel (LNA,
VGA, and AAF) Normal Imaging Mode
o Selectable Active Input-Impedance Matching of
50Ω, 100Ω, 200Ω, and 1kΩ
o Wide Input-Voltage Range of 330mV_P-P in High LNA
Gain Mode and 550mV_P-P in Low LNA Gain Mode
o Integrated Selectable 3-Pole 9MHz, 10MHz,
15MHz, and 18MHz Butterworth AAF
o Fast-Recovery, Low-Power Modes (< 2µs)
o Pin Compatible with the MAX2078 Ultrasound
Front-End with CW Doppler (MAX2077 68-Pin
Package Variant)
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MAX2077CTN+
0°C to +70°C 56 Thin QFN-EP**
MAX2077CTK+^†
0°C to +70°C 68 Thin QFN-EP**
+Denotes a lead(Pb)-free/RoHS-compliant package.
**EP = Exposed pad.
†_{Future product—contact factory for availability.}
*When coupled with the MAX1437B ADC.
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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.