參數(shù)資料
型號(hào)： MAX2038CCQ+T
廠商： Maxim Integrated Products
文件頁(yè)數(shù)： 10/24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(lèi)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(lèi)型： 表面貼裝
封裝/外殼： 100-TQFP 裸露焊盤(pán)
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
18
______________________________________________________________________________________
Synchronization
Figure 1 illustrates the serial programming of the 8 indi-
vidual channels through the serial data port. Note that
the serial data can be daisy chained from one part to
another, allowing a single data line to be used to pro-
gram multiple chips in the system.
CW Lowpass Filter
The MAX2038 also includes selectable lowpass filters
between each CW differential input pair and corre-
sponding mixer input. Shunt capacitors and resistors
are integrated on chip for high band and low band. The
parallel capacitor/resistor networks, which appear differ-
entially across each of the CW differential inputs, are
selectable through the CW_FILTER. Drive CW_FILTER
high to set the corner frequency of the filter to be fC =
9.5MHz. Drive CW_FILTER low to set the corner fre-
quency equal to fC = 4.5MHz. The CW_VG allows the fil-
ter inputs to be disconnected from input nodes (internal
to chip) to prevent overloading the LNA output and to
not change the VGA input common-mode voltage.
VGA and CW Mixer Operation
During normal operation, the MAX2038 is configured
such that either the VGA path is enabled while the mixer
array is powered down (VGA mode), or the quadrature
mixer array is enabled while the VGA path is powered
down (CW mode). During VGA mode, besides powering
down the CW mixer array, the differential inputs to the
lowpass filters and CW mixers also are internally discon-
nected from the input nodes, making the CW differential
inputs (CWIN_+, CWIN_-) high impedance. The CW
mode disconnects the VGA inputs internally from the
input ports of the device. For VGA mode, set CW_VG to a
logic-high, while for CW mode, set CW_VG to a logic-low.
Power-Down and Low-Power Modes
During device power-down, both the VGA and CW
mixer are disabled regardless of the logic set at
CW_VG. Both the VGA and CW mixer inputs are high
impedance since the internal switches to the inputs are
all disconnected. The total supply current of the device
reduces to 27mA. Set PD to a logic-high for device
power-down.
A low-power mode is available to lower the required
power for CWD operation. When selected, the complex
mixers operate at lower quiescent currents and the total
per-channel current is lowered to 53mA. Note that oper-
ation in this mode slightly reduces the dynamic perfor-
mance of the device. Table 6 shows the logic function
of standard operating modes.
CHANNEL 1
DATA_IN
DATA_OUT
CLOCK
AB
C
DSD
B3 B2 B1 B0 B4
CHANNEL 2
AB
C
DSD
B3 B2 B1 B0 B4
CHANNEL 3
AB
C
DSD
B3 B2 B1 B0 B4
CHANNEL 4
AB
C
DSD
B3 B2 B1 B0 B4
CHANNEL 5
AB
C
DSD
B3 B2 B1 B0 B4
CHANNEL 6
AB
C
DSD
B3 B2 B1 B0 B4
CHANNEL 7
AB
C
DSD
B3 B2 B1 B0 B4
CHANNEL 8
AB
C
DSD
B3 B2 B1 B0 B4
Figure 1. Data Flow of Serial Shift Register
PD
INPUT
CW_VG
INPUT
LOW_PWR
VGA
CW
MIXER
INTERNAL
SWITCH
TO VGA
INTERNAL
SWITCH TO LPF
AND CW MIXER
5V VCC CURRENT
CONSUMPTION
(mA)
11V VMIX CURRENT
CONSUMPTION
(mA)
1
N/A
Off
27
0
1
0
N/A
Off
27
0
Off
On
Off
On
245
106
0
1
Off
On
Off
On
245
53
0
1
N/A
On
Off
On
Off
204
0
Table 6. Logic Function of Standard Operating Modes
N/A = Not applicable.
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參數(shù)描述
MAX2038EVKIT 制造商:Maxim Integrated Products 功能描述:ULTRASOUND VARIABLE-GAIN AMPLIFIER WITH CWD (12B COMPATIBLE - Boxed Product (Development Kits)
MAX2038混頻器 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:
MAX2039 制造商:MAXIM 制造商全稱(chēng):Maxim Integrated Products 功能描述:Evaluation Kit
MAX2039_1 制造商:MAXIM 制造商全稱(chēng):Maxim Integrated Products 功能描述:Evaluation Kit
MAX2039ETP 功能描述:射頻混合器 1.7GHz-2.2GHz Up/Down Mixer RoHS:否 制造商:NXP Semiconductors 頻率范圍: 轉(zhuǎn)換損失——最大: 工作電源電壓:6 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube
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