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参数资料
| 型号： | MAX3768 |
| 厂商： | Maxim Integrated Products, Inc. |
| 英文描述： | +3.0V至+5.5V、1.25Gbps/2.5Gbps限幅放大器 |
| 中文描述： | +3.0V至+5.5V、1.25Gbps/2.5Gbps限幅放大器 |
| 文件页数： | 13/14页 |
| 文件大小： | 222K |
| 代理商： | MAX3768 |
MAX4063
Differential Microphone Preamplifier with
Internal Bias and Complete Shutdown
8
_______________________________________________________________________________________
book PCs or PDAs. Used correctly, the advantages
over a single-ended solution are:
Better power-supply noise rejection.
Less degradation from noise in PC board ground
planes.
The microphone and preamplifier may be placed
physically further apart, easing PC board layout
restrictions.
Differential-Gain Adjustment
The MAX4063 allows the user to alter the differential
gain to optimize the signal-to-noise ratio (SNR) of their
system. The gain is set by a single external resistor
(RG) connected between the G1 and G2 pins:
where AV is the required voltage gain.
Hence, an 11.11k
resistor yields a gain of 20V/V, or
26dB. Leaving the pins unconnected results in a gain of
2V/V. Gain is defined as:
For differential out:
The resistor can be either fixed or variable, allowing the
use of a digitally controlled potentiometer to alter the
gain under software control.
Auxiliary Input-Gain Adjustment
The MAX4063 provides an option to increase the
AUX_IN (see Figure 3). To increase the gain, connect
resistor RADJ between the ADJ and AUX_IN pins. RADJ is
calculated from the following formula:
R
2M
AV
ADJ
AUX
=
20
()
to increase the gain
A
V
VD
OUT
IN+
IN-
=
V
R
200k
A
G
VD
=
2
BIAS
AUX_IN
12
IN-
IN+
10
9
6
VCC
2.4V TO 5.5V
MAX4063
2
INT/AUX
8
OUT
ADJ
4
7
GND
11
SHDN
VCC
3
BIAS
5
VBIAS
G2
G1
1
14
RG
Functional Diagram
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX3768C/D | 功能描述:限幅放大器 RoHS:否 制造商:Micrel 输入电压范围（最大值）:3.6 V 工作电源电压:3.3 V 电源电流:40 mA 工作温度范围:- 40 C to + 85 C 封装 / 箱体:MSOP-10 封装:Tube |
| MAX3768CUB | 功能描述:限幅放大器 3-5.5V 1.25/2.5Gbps RoHS:否 制造商:Micrel 输入电压范围（最大值）:3.6 V 工作电源电压:3.3 V 电源电流:40 mA 工作温度范围:- 40 C to + 85 C 封装 / 箱体:MSOP-10 封装:Tube |
| MAX3768CUB+ | 功能描述:限幅放大器 3-5.5V 1.25/2.5Gbps RoHS:否 制造商:Micrel 输入电压范围（最大值）:3.6 V 工作电源电压:3.3 V 电源电流:40 mA 工作温度范围:- 40 C to + 85 C 封装 / 箱体:MSOP-10 封装:Tube |
| MAX3768CUB+T | 功能描述:限幅放大器 3-5.5V 1.25/2.5Gbps RoHS:否 制造商:Micrel 输入电压范围（最大值）:3.6 V 工作电源电压:3.3 V 电源电流:40 mA 工作温度范围:- 40 C to + 85 C 封装 / 箱体:MSOP-10 封装:Tube |
| MAX3768CUB-T | 功能描述:限幅放大器 3-5.5V 1.25/2.5Gbps RoHS:否 制造商:Micrel 输入电压范围（最大值）:3.6 V 工作电源电压:3.3 V 电源电流:40 mA 工作温度范围:- 40 C to + 85 C 封装 / 箱体:MSOP-10 封装:Tube |
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