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參數(shù)資料
| 型號： | MAX4063ETE+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 14/14頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC PREAMP AUDIO STER AB 16TQFN |
| 產(chǎn)品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 75 |
| 類型： | AB 類 |
| 輸出類型： | 2 通道（立體聲） |
| 電源電壓： | 2.4 V ~ 5.5 V |
| 特點： | 差分輸入，麥克風，關機 |
| 安裝類型： | 表面貼裝 |
| 供應商設備封裝： | 16-TQFN-EP（4x4） |
| 封裝/外殼： | 16-WQFN 裸露焊盤 |
| 包裝： | 管件 |
MAX4063
Differential Microphone Preamplifier with
Internal Bias and Complete Shutdown
_______________________________________________________________________________________
9
where:
RADJ is placed between AUX_IN and ADJ.
Input Capacitors
The two differential microphone inputs and the single-
ended auxiliary input of the MAX4063 have on-chip
bias components, allowing the user to AC-couple any
signals into 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:
CIN = 1 / (2
πfCUTRIN)
This assumes a low source impedance is 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-
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 should be sufficiently small such that the
output is not clipped in either differential or common-
AV
V
AUX
OUT
AUX_IN
=
V
Figure 1. MAX4063 with Auxiliary Input Configuration
ADJ
7
AUX_IN
12
5
IN-
IN+
10
9
6
VCC
2.4V TO 5.5V
MAX4063
2
INT/AUX
8
OUT
OUT 4
GND
11
SHDN
VBIAS
SHDN
VCC
3
G2
G1
BIAS
1
14
RBIAS
CBIAS
100k
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MAX4063ETE+ | 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 |
| MAX4063ETE+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 |
| MAX4063ETE-T | 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 |
| MAX4063EUD | 制造商:Maxim Integrated Products 功能描述:DIFFERENTIAL MICROPHONE PREAMPLIFIER WITH INT - Rail/Tube |
| MAX4063EUD+ | 功能描述:傳聲器前置放大器 Integrated Circuits (ICs) 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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