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| 型号： | MAX2658 |
| 厂商： | Maxim Integrated Products, Inc. |
| 英文描述： | GPS/GNSS低噪声放大器 |
| 中文描述： | GPS/GNSS低噪声放大器 |
| 文件页数： | 15/15页 |
| 文件大小： | 559K |
| 代理商： | MAX2658 |
MAX4060/MAX4061/MAX4062
Fixed Differential Gain (MAX4060)
The MAX4060 has an internal fixed gain of 10V/V for its
differential input. This feature simplifies design, reduces
pin count, footprint, and eliminates external gain-setting
resistors.
Adjustable Differential-Gain Setting
The MAX4061/MAX4062 allow the user to alter the gain
to optimize the signal-to-noise ratio (SNR) of their sys-
tem. The gain is set by a single external resistor (RG)
connected between the G1 and G2 pins, where:
RG = 100k
Ω / (AV - 1)
where AV is the required voltage gain.
Hence, an 11.11k
Ω resistor yields a gain of 10V/V, or
20dB. Leaving the pins unconnected results in a gain
of 1V/V. Gain for the MAX4061/MAX4062 is defined as:
AV = VOUT / (VIN+ - VIN-)
The resistor can be either fixed or variable, allowing the
use of a digitally controlled potentiometer to alter the
gain under software control.
Input Capacitors
The two differential microphone inputs and the single-
ended auxiliary input of the MAX4060/MAX4061/
MAX4062 have on-chip bias components, allowing the
user to AC-couple any signals onto the input. The input
resistance is 100k
Ω (typ), so the capacitor size may be
chosen accordingly to define the LF rolloff desired. This
can be calculated as:
CIN = 1 / (2
πfCUTRIN)
This assumes a low source impedance driving the inputs.
A further consideration for the differential input is the
effect of these series input capacitors on low-frequency,
common-mode rejection. Any mismatch in the values of
these two capacitors degrades the CMRR at frequen-
cies where the impedance of the capacitor is significant
compared to the input resistance of the amplifier—this is
usually most noticeable at low frequencies. One way to
avoid the need for matched or tight tolerance capaci-
tors is to deliberately oversize the values on the differ-
BIAS
IN-
IN+
6
5
4
VCC
2.4V TO 5.5V
MAX4060
INT/AUX 1
OUT 2
GND
7
BIAS
3
VBIAS
BIAS
x10
BIAS
8 AUX_IN
x10
Functional Diagram
Differential Microphone Preamplifiers with
Internal Bias and Complete Shutdown
_______________________________________________________________________________________
9
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX2658AEVKIT+ | 功能描述:放大器 IC 开发工具 MAX2658A Eval Kit RoHS:否 制造商:International Rectifier 产品:Demonstration Boards 类型:Power Amplifiers 工具用于评估:IR4302 工作电源电压:13 V to 23 V |
| MAX2658EVKIT+ | 功能描述:射频开发工具 MAX2658 Eval Kit RoHS:否 制造商:Taiyo Yuden 产品:Wireless Modules 类型:Wireless Audio 工具用于评估:WYSAAVDX7 频率: 工作电源电压:3.4 V to 5.5 V |
| MAX2658EWT+ | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| MAX2658EWT+T | 功能描述:射频放大器 GPS/GNSS Low Noise Amp RoHS:否 制造商:Skyworks Solutions, Inc. 类型:Low Noise Amplifier 工作频率:2.3 GHz to 2.8 GHz P1dB:18.5 dBm 输出截获点:37.5 dBm 功率增益类型:32 dB 噪声系数:0.85 dB 工作电源电压:5 V 电源电流:125 mA 测试频率:2.6 GHz 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:QFN-16 封装:Reel |
| MAX2658EWT+T10 | 功能描述:射频放大器 GPS/GNSS Low Noise Amp RoHS:否 制造商:Skyworks Solutions, Inc. 类型:Low Noise Amplifier 工作频率:2.3 GHz to 2.8 GHz P1dB:18.5 dBm 输出截获点:37.5 dBm 功率增益类型:32 dB 噪声系数:0.85 dB 工作电源电压:5 V 电源电流:125 mA 测试频率:2.6 GHz 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:QFN-16 封装:Reel |
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