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參數(shù)資料
| 型號(hào)： | MAX4060-MAX4062 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Differential Microphone Preamplifiers with Internal Bias and Complete Shutdown |
| 中文描述： | 差分麥克風(fēng)前置放大器，內(nèi)部偏置和徹底關(guān)閉 |
| 文件頁(yè)數(shù)： | 10/17頁(yè) |
| 文件大小： | 443K |
| 代理商： | MAX4060-MAX4062 |
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M
Differential Microphone Preamplifiers with
Internal Bias and Complete Shutdown
10
______________________________________________________________________________________
AUX_IN
9
4
IN-
IN+
7
6
5
V
CC
2.4V TO 5.5V
MAX4062
2
GND
8
V
BIAS
G2
G1
BIAS
R
BIAS
C
BIAS
100k
OUT 3
INT/AUX
10
1
x10
Figure 1. MAX4062 with Auxiliary Input Configuration
ential inputs and to set the lower 3dB point (f
CUT
) 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
V
IN
as an AC signal:
CMRR(dB) = A
DM
/ A
CM
where A
DM
is the differential gain, A
CM
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
, 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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| MAX4061EUA | Differential Microphone Preamplifiers with Internal Bias and Complete Shutdown |
| MAX4060ETA | 16-Bit Fixed-Point DSP with ROM 64-TQFP -40 to 85 |
| MAX4061ETA | 16-Bit Fixed-Point DSP with ROM 64-TQFP -40 to 125 |
| MAX4062EUB | 16-bit fixed point DSP with ROM 100-LQFP -40 to 85 |
| MAX4060EUA | Differential Microphone Preamplifiers with Internal Bias and Complete Shutdown |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX4061 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Differential Microphone Preamplifiers with Internal Bias and Complete Shutdown |
| MAX4061EGA | 制造商:Maxim Integrated Products 功能描述:DIFFERENTIAL MICROPHONE PREAMPLIFIERS WITH IN - Rail/Tube |
| MAX4061ETA | 制造商:Maxim Integrated Products 功能描述:DIFFERENTIAL MICROPHONE PREAMPLIFIERS WITH IN - Rail/Tube |
| MAX4061ETA+ | 制造商:Maxim Integrated Products 功能描述:AUD AMP MCRPH 1CH MONO CLS-AB 8TDFN EP - Rail/Tube |
| MAX4061ETA+T | 功能描述:傳聲器前置放大器 Differential Mic Preamplifier RoHS:否 制造商:Texas Instruments 可用增益調(diào)整:Digital control, 65 dB to 0 dB 共模抑制比（最小值）: 輸入補(bǔ)償電壓: 最大輸入電阻:9200 Ohms 最大工作溫度:+ 85 C 封裝 / 箱體:SSOP-28 封裝:Tube |
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