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參數(shù)資料
| 型號(hào)： | MAX4450 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Ultra-Small, Low-Cost, 210MHz, Single-Supply Op Amps with Rail-to-Rail Outputs |
| 中文描述： | 超小型、低成本、210MHz、單電源運(yùn)算放大器，滿擺幅輸出 |
| 文件頁(yè)數(shù)： | 7/12頁(yè) |
| 文件大小： | 456K |
| 代理商： | MAX4450 |
Detailed Description
The MAX4450/MAX4451 are single-supply, rail-to-rail,
voltage-feedback amplifiers that employ current-feed-
back techniques to achieve 485V/μs slew rates and
210MHz bandwidths. Excellent harmonic distortion and
differential gain/phase performance make these ampli-
fiers an ideal choice for a wide variety of video and RF
signal-processing applications.
The output voltage swings to within 55mV of each sup-
ply rail. Local feedback around the output stage
ensures low open-loop output impedance to reduce
gain sensitivity to load variations. The input stage per-
mits common-mode voltages beyond the negative sup-
ply and to within 2.25V of the positive supply rail.
Applications Information
Choosing Resistor Values
Unity-Gain Configuration
The MAX4450/MAX4451 are internally compensated for
unity gain. When configured for unity gain, the devices
require a 24
resistor (R
F
) in series with the feedback
path. This resistor improves AC response by reducing
the Q of the parallel LC circuit formed by the parasitic
feedback capacitance and inductance.
Inverting and Noninverting Configurations
Select the gain-setting feedback (R
F
) and input (R
G
)
resistor values to fit your application. Large resistor val-
ues increase voltage noise and interact with the amplifi-
er’s input and PC board capacitance. This can
generate undesirable poles and zeros and decrease
bandwidth or cause oscillations. For example, a nonin-
verting gain-of-two configuration (R
F
= R
G
) using 1k
resistors, combined with 1pF of amplifier input capaci-
tance and 1pF of PC board capacitance, causes a pole
at 159MHz. Since this pole is within the amplifier band-
width, it jeopardizes stability. Reducing the 1k
resis-
tors to 100
extends the pole frequency to 1.59GHz,
but could limit output swing by adding 200
in parallel
with the amplifier’s load resistor. Table 1 lists suggest-
ed feedback and gain resistors, and bandwidths for
several gain values in the configurations shown in
Figures 1a and 1b.
Layout and Power-Supply Bypassing
These amplifiers operate from a single +4.5V to +11V
power supply or from dual ±2.25V to ±5.5V supplies. For
single-supply operation, bypass V
CC
to ground with a
M
Ultra-Small, Low-Cost, 210MHz, Single-Supply
Op Amps with Rail-to-Rail Outputs
_______________________________________________________________________________________
7
Pin Description
PIN
OUT
V
EE
IN+
INA-
OUTA
V
CC
IN-
INB+
INB-
OUTB
INA+
—
4
—
2
1
8
—
5
6
7
3
1
Amplifier Output
2
Negative Power Supply
or Ground (in single-
supply operation)
3
Noninverting Input
—
Amplifier A Inverting
Input
—
Amplifier A Output
5
Positive Power Supply
4
Inverting Input
—
Amplifier B Noninverting
Input
—
Amplifier B Inverting
Input
—
Amplifier B Output
—
Amplifier A Noninverting
Input
IN
R
G
V
OUT
= [1+ (R
F
/ R
G
)] V
IN
R
F
R
TO
R
TIN
R
O
V
OUT
MAX445 _
Figure 1a. Noninverting Gain Configuration
IN
R
G
V
OUT
= -(R
F
/ R
G
) V
IN
R
F
R
TO
R
S
R
TIN
R
O
V
OUT
MAX445 _
Figure 1b. Inverting Gain Configuration
FUNCTION
MAX4450
NAME
MAX4451
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX4450EUK-T | Ultra-Small, Low-Cost, 210MHz, Single-Supply Op Amps with Rail-to-Rail Outputs |
| MAX4460-MAX4462 | Precision Instrumentation Amplifier |
| MAX4461 | Precision Instrumentation Amplifier |
| MAX4462 | Precision Instrumentation Amplifier |
| MAX4462HEUT-T | Precision Instrumentation Amplifier |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX4450EUK | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube 制造商:Rochester Electronics LLC 功能描述: |
| MAX4450EUK+ | 制造商:Maxim Integrated Products 功能描述:OP AMP SGL VOLT FDBK R-R O/P 5.5V/11V 5PIN SOT-23 - Rail/Tube |
| MAX4450EUK+T | 功能描述:高速運(yùn)算放大器 210MHz Single-Supply w/Rail-Rail Output RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 電壓增益 dB:116 dB 輸入補(bǔ)償電壓:0.5 mV 轉(zhuǎn)換速度:55 V/us 工作電源電壓:36 V 電源電流:7.5 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| MAX4450EUK-T | 功能描述:運(yùn)算放大器 - 運(yùn)放 Integrated Circuits (ICs) RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補(bǔ)償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| MAX4450EVKIT | 功能描述:放大器 IC 開(kāi)發(fā)工具 Evaluation Kit for the MAX4450 RoHS:否 制造商:International Rectifier 產(chǎn)品:Demonstration Boards 類型:Power Amplifiers 工具用于評(píng)估:IR4302 工作電源電壓:13 V to 23 V |
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