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參數(shù)資料
| 型號(hào)： | MAX4061EUA |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | Differential Microphone Preamplifiers with Internal Bias and Complete Shutdown |
| 中文描述： | 1 CHANNEL, AUDIO PREAMPLIFIER, PDSO8 |
| 封裝： | MICRO MAX PACKAGE-8 |
| 文件頁(yè)數(shù)： | 9/17頁(yè) |
| 文件大?。?/td> | 443K |
| 代理商： | MAX4061EUA |
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M
Differential Microphone Preamplifiers with
Internal Bias and Complete Shutdown
_______________________________________________________________________________________
9
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 (R
G
)
connected between the G1 and G2 pins, where:
R
G
= 100k
/ (A
V
- 1)
where A
V
is the required voltage gain.
Hence, an 11.11k
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:
A
V
= V
OUT
/ (V
IN+
- V
IN-
)
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
(typ), so the capacitor size may be
chosen accordingly to define the LF rolloff desired. This
can be calculated as:
C
IN
= 1 / (2
π
f
CUT
R
IN
)
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
V
CC
2.4V TO 5.5V
MAX4060
INT/AUX 1
OUT 2
GND
7
BIAS
3
V
BIAS
BIAS
x10
BIAS
8 AUX_IN
x10
Functional Diagram
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 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 |
| MAX4063 | 16-bit fixed point DSP with ROM 100-LQFP -40 to 125 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX4061EUA+ | 制造商:Maxim Integrated Products 功能描述:AUD AMP MCRPH 1CH MONO CLS-AB 8PIN UMAX - Rail/Tube |
| MAX4061EUA+T | 制造商:Maxim Integrated Products 功能描述:AUD AMP MCRPH 1CH MONO CLS-AB 8PIN UMAX - Tape and Reel |
| MAX4062 | 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 |
| MAX4062EUB | 功能描述:傳聲器前置放大器 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 |
| MAX4062EUB+ | 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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