參數(shù)資料
型號(hào): MAX2038CCQ+T
廠商: Maxim Integrated Products
文件頁(yè)數(shù): 7/24頁(yè)
文件大?。?/td> 0K
描述: IC VGA W/OCTAL MIXER 8CH 100TQFP
產(chǎn)品培訓(xùn)模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝: 250
類型: 可變?cè)鲆娣糯笃?br>
應(yīng)用: 醫(yī)療用超聲波成像,聲納
安裝類型: 表面貼裝
封裝/外殼: 100-TQFP 裸露焊盤
供應(yīng)商設(shè)備封裝: 100-TQFP-EP(14x14)
包裝: 帶卷 (TR)
MAX2038
Ultrasound VGA Integrated
with CW Octal Mixer
______________________________________________________________________________________
15
VGA Clamp
A clamp is provided to limit the VGA output signals to
avoid overdriving the ADC or to prevent ADC satura-
tion. Set VG_CLAMP_MODE low to clamp the VGA dif-
ferential outputs at 2.4VP-P. Set the VG_CLAMP_MODE
high to disable the clamp.
Power-Down
The device can also be powered down with PD. Set PD
to logic-high for power-down mode. In power-down
mode, the device draws a total supply current of 27mA.
Set PD to a logic-low for normal operation.
Overload Recovery
The device is also optimized for quick overload recovery
for operation under the large input-signal conditions that
are typically found in ultrasound input buffer imaging
applications. See the
Typical Operating Characteristics
for an illustration of the rapid recovery time from a trans-
mit-related overload.
Octal Continuous Wave (CW) Mixer
The MAX2038 CW mixers are designed using an active
double-balanced topology. The mixers achieve high
dynamic range and high linearity performance, with
exceptionally low noise, which is ideal for ultrasound
CWD signal reception. The octal quadrature mixer
array provides noise performance of -155dBc/Hz at
1kHz from a 1.25MHz carrier, and a two-tone third-
order ultrasound specific intermodulation product of
typically -50dBc. See the
Ultrasound-Specific IMD3
Specification in the Applications Information section.
The octal array exhibits quadrature and in-phase differ-
ential current outputs (CW_QOUT+, CW_QOUT-,
CW_IOUT+, CW_IOUT-) to produce the total CWD
beamformed signal. The maximum differential current
output is typically 3mAP-P and the mixer output-compli-
ance voltage ranges from 4.75V to 12V.
CHANNEL 1
I/Q
DIVIDER
PHASE
SELECTOR
5
5-BIT
SR
5-BIT
SR
5-BIT
SR
IQ
I Q
DIN
CLK
LO_LVDS+
LO_LVDS-
CWIN1
CWIN2
CWIN8
GND
CW_M2
CW_M1
CW_IOUT+
DOUT
LOW_PWR
PD
CW_IOUT-
CW_QOUT-
CW_QOUT+
CW_IOUT2+
CW_QOUT2-
LOAD
LO1
LO2
LO8
VCC
VREF
CW_FILTER
M4_EN
MAX2038
I Q
CHANNEL 2
I/Q
DIVIDER
PHASE
SELECTOR
5
CHANNEL 8
I/Q
DIVIDER
PHASE
SELECTOR
5
High-Level CW Mixer and Programmable
Beamformer Functional Diagram
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