參數(shù)資料
型號: MAX4350EUK+T
廠商: Maxim Integrated Products
文件頁數(shù): 10/11頁
文件大小: 0K
描述: IC OP AMP R-R SGL SOT23-5
產(chǎn)品培訓(xùn)模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標準包裝: 2,500
放大器類型: 電壓反饋
電路數(shù): 1
輸出類型: 滿擺幅
轉(zhuǎn)換速率: 485 V/µs
-3db帶寬: 210MHz
電流 - 輸入偏壓: 7.5µA
電壓 - 輸入偏移: 1000µV
電流 - 電源: 6.9mA
電流 - 輸出 / 通道: 80mA
電壓 - 電源,單路/雙路(±): 9 V ~ 11 V,±4.5 V ~ 5.5 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: SC-74A,SOT-753
供應(yīng)商設(shè)備封裝: SOT-23-5
包裝: 帶卷 (TR)
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
VEE to (VCC - 2.25V) with excellent common-mode
rejection. Beyond this range, the amplifier output is a
nonlinear function of the input, but does not undergo
phase reversal or latchup. The output swings to within
125mV of either power-supply rail with a 2k
load.
Output Capacitive Load and Stability
The MAX4350/MAX4351 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 Isolation Resistance (RISO) 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.
MAX4350/MAX4351
Ultra-Small, Low-Cost, 210MHz, Dual-Supply
Op Amps with Rail-to-Rail Outputs
8
_______________________________________________________________________________________
RG
RF
RISO
50
CL
VOUT
VIN
RTIN
MAX435 _
Figure 2. Driving a Capacitive Load Through an Isolation Resistor
30
25
20
5
10
15
0
CAPACITIVE LOAD (pF)
50
0
100
200
150
250
ISOLATION
RESISTANCE
(
)
Figure 3. Isolation Resistance vs. Capacitive Load
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