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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： | 2/15页 |
| 文件大小： | 559K |
| 代理商： | MAX2658 |
MAX4060/MAX4061/MAX4062
Differential Microphone Preamplifiers with
Internal Bias and Complete Shutdown
10
______________________________________________________________________________________
AUX_IN
9
4
IN-
IN+
7
6
5
VCC
2.4V TO 5.5V
MAX4062
2
GND
8
VBIAS
G2
G1
BIAS
RBIAS
CBIAS
100k
Ω
OUT 3
INT/AUX
10
1
x10
Figure 1. MAX4062 with Auxiliary Input Configuration
ential inputs and to set the lower 3dB point (fCUT) of the
amplifier by sizing the output capacitor appropriately.
The input impedance matching on the differential input
is typically 1%, allowing input capacitor matching to be
effective at improving low-frequency PSRR.
Common-Mode Rejection Ratio
The common-mode rejection ratio (CMRR) refers to the
amount of rejection that the amplifier is capable of pro-
viding to any signal applied equally to the IN+ and IN-
inputs. In the case of amplifying low-level microphone
signals in noisy digital environments, it is a key figure of
merit. In audio circuits, this is generally measured for
VIN as an AC signal:
CMRR(dB) = ADM / ACM
where ADM is the differential gain, ACM is the common-
mode gain.
Input voltages are sufficiently small such that the output
is not clipped in either differential or common-mode
application. The topology used in the MAX4061/
MAX4062 means that the CMRR actually improves at
higher differential gains—another advantage of using
differential sensing.
Auxiliary Input
The auxiliary input is a single-ended input intended to
be used with a jack-socket-type microphone input
(Figure 1). Internal DC-bias components (as on the
main inputs) allow the input signal to be AC-coupled.
Mechanically switched jack sockets can be used in
conjunction with the INT/AUX select pin, allowing the
auxiliary microphone input to be automatically selected
when a jack socket is inserted.
Microphone Bias Voltage
MAX4060
The MAX4060 has a microphone bias voltage designed
to comply with the Microsoft/Intel PC99/2001 audio
standard. It features source impedance of greater than
2k
Ω, and delivers more than 2V of bias when loaded
with a current of 800μA. This limits operation of this part
to supplies between 4.5V to 5.5V (see Figure 2).
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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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