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參數(shù)資料
| 型號： | 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、單電源運算放大器，滿擺幅輸出 |
| 文件頁數(shù)： | 8/12頁 |
| 文件大小： | 456K |
| 代理商： | MAX4450 |
Note:
R
L
= R
O
+ R
TO
; R
TIN
and R
TO
are calculated for 50
applications. For 75
systems, R
TO
= 75
; calculate R
TIN
from the
following equation:
R
=
1-75
R
G
0.1μF capacitor as close to the pin as possible. If operat-
ing with dual supplies, bypass each supply with a 0.1μF
capacitor.
Maxim recommends using microstrip and stripline tech-
niques to obtain full bandwidth. To ensure that the PC
board does not degrade the amplifier’s performance,
design it for a frequency greater than 1GHz. Pay care-
ful attention to inputs and outputs to avoid large para-
sitic capacitance. Whether or not you use a constant-
impedance board, observe the following design guide-
lines:
Don’t use wire-wrap boards; they are too inductive.
Don’t use IC sockets; they increase parasitic capaci-
tance and inductance.
Use surface-mount instead of through-hole compo-
nents for better high-frequency performance.
Use a PC board with at least two layers; it should be
as free from voids as possible.
Keep signal lines as short and as straight as possi-
ble. Do not make 90° turns; round all corners.
Rail-to-Rail Outputs,
Ground-Sensing Input
The input common-mode range extends from
(V
EE
- 200mV) to (V
CC
- 2.25V) with excellent common-
mode rejection. Beyond this range, the amplifier output
is a nonlinear function of the input, but does not under-
go phase reversal or latchup.
The output swings to within 55mV of either power-
supply rail with a 2k
load. The input ground sensing
and the rail-to-rail output substantially increase the
dynamic range. With a symmetric input in a single +5V
application, the input can swing 2.95Vp-p and the out-
put can swing 4.9Vp-p with minimal distortion.
Output Capacitive Loading and Stability
The MAX4450/MAX4451 are optimized for AC perfor-
mance. They are not designed to drive highly reactive
loads, which decrease phase margin and may produce
excessive ringing and oscillation. Figure 2 shows a cir-
cuit that eliminates this problem. Figure 3 is a graph of
the optimal isolation resistor (R
S
) vs. capacitive load.
Figure 4 shows how a capacitive load causes exces-
sive peaking of the amplifier’s frequency response if
the capacitor is not isolated from the amplifier by a
resistor. A small isolation resistor (usually 20
to 30
)
placed before the reactive load prevents ringing and
oscillation. At higher capacitive loads, AC performance
is controlled by the interaction of the load capacitance
and the isolation resistor. Figure 5 shows the effect of a
27
isolation resistor on closed-loop response.
Coaxial cable and other transmission lines are easily
driven when properly terminated at both ends with their
characteristic impedance. Driving back-terminated
transmission lines essentially eliminates the line’s
capacitance.
Table 1. Recommended Component Values
M
Ultra-Small, Low-Cost, 210MHz, Single-Supply
Op Amps with Rail-to-Rail Outputs
8
_______________________________________________________________________________________
-25
+25
-10
+10
-5
+5
-2
+2
-1
+1
49.9
10
∞
0
50
1200
GAIN (V/V)
49.9
5
49.9
—
20
500
49.9
15
∞
0
50
500
49.9
11
49.9
—
56
500
49.9
25
100
0
100
500
49.9
25
49.9
—
124
500
49.9
50
62
0
250
500
49.9
95
49.9
—
500
500
49.9
49.9
R
TO
(
)
100
210
Small-Signal -3dB Bandwidth (MHz)
56
49.9
R
TIN
(
)
0
—
R
S
(
)
COMPONENT
500
∞
R
G
(
)
500
24
R
F
(
)
75
TIN
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:運算放大器 - 運放 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 工具用于評估:IR4302 工作電源電壓:13 V to 23 V |
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