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参数资料
| 型号： | MAX2036CCQ+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 14/25页 |
| 文件大小： | 0K |
| 描述： | IC VGA W/OCTAL MIXER 8CH 100TQFP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 90 |
| 放大器类型： | 可变增益 |
| 电路数： | 8 |
| 输出类型： | 差分 |
| -3db带宽： | 2MHz |
| 电流 - 电源： | 245mA |
| 电流 - 输出 / 通道： | 3.75mA |
| 电压 - 电源，单路/双路(±)： | 4.75 V ~ 5.25 V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 100-TQFP 裸露焊盘 |
| 供应商设备封装： | 100-TQFP-EP（14x14） |
| 包装： | 托盘 |
CW Mixer Output Summation
The maximum differential current output is typically
3mAP-P and the mixer output compliance voltage
ranges from 4.75V to 12V per mixer channel. The mixer
common-mode current in each of the differential mixer
outputs is typically 3.25mA. The total summed current
would equal N x 3.25mA in each of the 115
load resis-
tors (where N = number of channels). In this case, the
quiescent output voltage at +VSUM and -VSUM outputs
would be +11V - (N x 3.25mA x 115) = +11V - (8 x
3.25mA x 115) = 8.05V. The voltage swing at each out-
put, with one channel driven at max output current (dif-
ferential 3mAP-P) while the other channels are not
driven, would be 1.5mAP-P x 115
or 174mVP-P and the
differential voltage would be 348mVP-P. The voltage
compliance range is defined as the valid range for
+VSUM and -VSUM in this example.
External Compensation
External compensation is required for bypassing inter-
nal biasing circuitry. Connect, as close as possible,
individual 4.7F capacitors from each pin EXT_C1,
EXT_C2, and EXT_C3 (pins 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
(0.1%) resistor from EXT_RES (pin
38) to ground.
Analog Input and Output Coupling
In typical applications, the MAX2036 is being driven
from a low-noise amplifier (such as the MAX2034) and
the VGA is typically driving a discrete differential anti-
alias filter into an ADC (such as the MAX1436 octal
ADC). The differential input impedance of the MAX2036
is typically 240
. The differential outputs of the VGA
are capable of driving a differential load capacitance to
GND at each of the VGA differential outputs of 60pF,
and differential capacitance across the VGA outputs is
10pF, RL = 1k
. The differential outputs have a com-
mon-mode bias of approximately 3.75V. 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, f1 represents reflections from tissue and f2 repre-
sents reflections from blood. The latter reflections are
typically 25dB lower in magnitude, and hence the mea-
surement is defined with one input tone 25dB lower than
the other. The IMD3 product of interest (f1 - (f2 - f1)) pre-
sents itself as an undesired Doppler error signal in ultra-
sound applications. See Figure 6.
PCB Layout
The pin configuration of the MAX2036 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 MAX2036’s TQFP-EP
package provides a low thermal-resistance path to the
die. It is important that the PCB on which the MAX2036
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.
MAX2036
Ultrasound VGA Integrated
with CW Octal Mixer
______________________________________________________________________________________
21
-25dB
ULTRASOUND
IMD3
f1 - (f2 - f1)f2 + (f2 - f1)
f1
f2
Figure 6. Ultrasound IMD3 Measurement Technique
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 |
| MAX2036CCQ+D | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX2036CCQ+T | 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 |
| MAX2036CCQ+TD | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Ultrasound VGA Integrated with CW Octal Mixer |
| MAX2036EVKIT | 制造商:Maxim Integrated Products 功能描述:ULTRASOUND VARIABLE-GAIN AMPLIFIER WITH CWD (10B COMPATIBLE - Boxed Product (Development Kits) |
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