参数资料
型号: MAX2035CCQ+T
厂商: Maxim Integrated
文件页数: 10/13页
文件大小: 0K
描述: IC AMP VARIABLE GAIN 100-TQFP
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 250
增益: 39.5dB
RF 型: SONAR
电源电压: 4.75 V ~ 5.25 V
电流 - 电源: 192mA ~ 216mA
封装/外壳: 100-TQFP 裸露焊盘
包装: 带卷 (TR)
Ultrasound Variable-Gain Amplifier
Applications Information
External Compensation
External compensation is required for bypassing inter-
nal biasing circuitry. Connect, as close as possible,
individual 4.7μF capacitors from each pin EXT_C1,
EXT_C2, and EXT_C3 (pin 13, 14, 15) to ground.
External Bias Resistor
An external resistor at EXT_RES is required to set the
bias for the internal biasing circuitry. Connect, as close
as possible, a 7.5k Ω resistor from EXT_RES (pin 38) to
ground.
Analog Input and Output Coupling
In typical applications, the MAX2035 is being driven
from a low-noise amplifier (such as the MAX2034) and
is typically driving a discrete differential anti-alias filter
into an ADC (such as the MAX1434 octal ADC). The
differential input impedance of the MAX2035 is typically
200 Ω . The differential outputs are capable of driving a
differential load resistance of 1k Ω . The output imped-
ance is 100 Ω differential. The differential outputs have
a common-mode bias of approximately 3V. AC-couple
these differential outputs if the next stage has a differ-
ent common-mode input range.
Ultrasound-Specific IMD3 Specification
Unlike typical communications specs, the two input
tones are not equal in magnitude for the ultrasound-
specific IMD3 two-tone specification. In this measure-
ment, f 1 represents reflections from tissue and f 2
represents reflections from blood. The latter reflections
are typically 25dB lower in magnitude, and hence the
PCB Layout
The pin configuration of the MAX2035 is optimized to
facilitate a very compact physical layout of the device
and its associated discrete components. A typical
application for this device might incorporate several
devices in close proximity to handle multiple channels
of signal processing.
The exposed pad (EP) of the MAX2035 ’s TQFP-EP
package provides a low thermal-resistance path to the
die. It is important that the PCB on which the MAX2035
is mounted be designed to conduct heat from the EP.
In addition, provide the EP with a low-inductance path
to electrical ground. The EP MUST be soldered to a
ground plane on the PCB, either directly or through an
array of plated via holes.
-25dB
ULTRASOUND
IMD3
measurement is defined with one input tone 25dB lower
f 1 - (f 2 - f 1 )
f 1
f 2
f 2 + (f 2 - f 1 )
than the other. The IMD3 product of interest (f 1 - (f 2 - f 1 ))
presents itself as an undesired Doppler error signal in
ultrasound applications. See Figure 1.
Figure 1. Ultrasound IMD3 Measurement Technique
10
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相关代理商/技术参数
参数描述
MAX2035CCQ-TD 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Ultrasound Variable-Gain Amplifier
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MAX2036 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Ultrasound VGA Integrated with CW Octal Mixer
MAX2036_1 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Ultrasound VGA Integrated with CW Octal Mixer
MAX2036CCQ+ 功能描述:仪表放大器 Ultrasound Variable Gain Amplifier RoHS:否 制造商:Texas Instruments 通道数量: 输入补偿电压:150 V 可用增益调整: 最大输入电阻:10 kOhms 共模抑制比(最小值):88 dB 工作电源电压:2.7 V to 36 V 电源电流:200 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:MSOP-8 封装:Bulk