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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： | 12/14页 |
| 文件大小： | 222K |
| 代理商： | MAX3768 |
MAX4063
Differential Microphone Preamplifier with
Internal Bias and Complete Shutdown
_______________________________________________________________________________________
7
Detailed Description
The MAX4063 is a differential microphone pre-
amplifier providing high-quality amplification, optimized
for use in computer and mobile applications. This device
features adjustable gain, very high power-supply rejec-
tion (95dB), and common-mode rejection (79dB), making
it ideal for low-noise applications. The MAX4063 provides
a differential input stage, making the device particularly
effective when layout constraints force the microphone
amplifier to be physically remote from the ECM micro-
phone.
The MAX4063 is capable of switching its output
between the differential input and an inverting single-
ended input. INT/AUX selects either the differential
input or single-ended auxiliary input. In addition, the
MAX4063 has an integrated microphone bias source,
simplifying system design and eliminating the need for
external components. The MAX4063 has a complemen-
tary output allowing CODECs and other devices with
differential inputs to be optimally driven (see
Functional
Diagram). The MAX4063 includes a 0.3A shutdown
mode for ultimate power savings. The differential gain
of the MAX4063 is set with a single resistor connected
between the G1 and G2 pins. The MAX4063 has an
internal default gain of 20V/V on the AUX_IN input. The
AUX_IN gain can be increased with a single external
resistor (see the
Differential-Gain Adjustment and
Auxiliary Input-Gain Adjustment sections).
Differential Input
The main microphone amplifier is a low-noise, differen-
tial input structure. This is an almost essential element
when faced with amplification of low-amplitude analog
signals in digitally intense environments such as note-
PIN
TSSOP
TQFN
NAME
FUNCTION
115
G2
Gain-Selectable Input. Connect an external resistor between G1 and G2 to set the gain for
the differential amplifier (see Adjustable Differential Gain-Setting section).
216
INT/AUX
Internal (Differential) or Auxiliary (Single-Ended) Input Select. Drive INT/AUX low to select
differential in or high to select auxiliary in.
31
SHDN
Shutdown Input. Drive SHDN high for normal operation. Drive SHDN low for shutdown
mode.
4
2
OUT
Amplifier Output. OUT is high impedance when in shutdown mode.
5
3
BIAS
External Electret Microphone Capsule Bias Output. Bypass BIAS with a 1F capacitor to
ground.
64
VCC
Power Supply. Bypass the VCC to GND with a 0.1F capacitor.
7
5
ADJ
Adjustable Gain Select for AUX_IN (see Auxiliary Input-Gain Adjustment section). Connect
a 10pF capacitor between OUT and ADJ.
87
OUT
Complementary Amplifier Output. OUT is high impedance in shutdown mode.
9
IN+
Noninverting Differential Amplifier Input. AC-couple the audio signal into IN+.
10
IN-
Inverting Differential Amplifier Input. AC-couple the audio signal into IN-.
11
GND
Ground
12
AUX_IN
Single-Ended Input for Auxiliary Microphone. AC-couple the audio signal into AUX_IN.
13
6, 8, 14
N.C.
No Connection. Not internally connected.
14
13
G1
Gain-Selectable Input. Connect an external resistor between G1 and G2 to set the gain for
the differential amplifier.
——
EP
Exposed Pad (TQFN Only). Internally connected to GND. Connect to a large ground plane
to maximize thermal performance. Not intended as an electrical connection point.
Pin Description
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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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