參數(shù)資料
型號: MAX494ESD+T
廠商: Maxim Integrated Products
文件頁數(shù): 5/17頁
文件大?。?/td> 0K
描述: IC OPAMP QD MICROPWR R/R 14SOIC
產(chǎn)品培訓模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標準包裝: 2,500
放大器類型: 通用
電路數(shù): 4
輸出類型: 滿擺幅
轉(zhuǎn)換速率: 0.2 V/µs
增益帶寬積: 500kHz
電流 - 輸入偏壓: 25nA
電壓 - 輸入偏移: 200µV
電流 - 電源: 150µA
電流 - 輸出 / 通道: 30mA
電壓 - 電源,單路/雙路(±): 2.7 V ~ 6 V,±1.35 V ~ 3 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 14-SOIC(0.154",3.90mm 寬)
供應商設備封裝: 14-SOIC
包裝: 帶卷 (TR)
MAX492/MAX494/MAX495
Single/Dual/Quad, Micropower,
Single-Supply Rail-to-Rail Op Amps
12
______________________________________________________________________________________
in series with IN-, IN+, or both. Series resistors are not
recommended for amplifier applications, as they may
increase input offsets and decrease amplifier bandwidth.
Output Loading and Stability
Even with their low quiescent current of less than 150A
per op amp, the MAX492/MAX494/MAX495 are well
suited for driving loads up to 1k
while maintaining DC
accuracy. Stability while driving heavy capacitive loads
is another key advantage over comparable CMOS rail-
to-rail op amps.
In op amp circuits, driving large capacitive loads
increases the likelihood of oscillation. This is especially
true for circuits with high loop gains, such as a unity-
gain voltage follower. The output impedance and a
capacitive load form an RC network that adds a pole to
the loop response and induces phase lag. If the pole
frequency is low enough—as when driving a large
capacitive load—the circuit phase margin is degraded,
leading to either an under-damped pulse response or
oscillation.
10
s/div
VIN
50mV/div
VOUT
50mV/div
10
s/div
VIN
50mV/div
VOUT
50mV/div
10
s/div
VIN
50mV/div
VOUT
50mV/div
Figure 7c. MAX492 Voltage Follower with 500pF Load—
RL = ∞
Figure 7a. MAX492 Voltage Follower with 500pF Load—
RL = 5k
Figure 7b. MAX492 Voltage Follower with 500pF Load—
RL = 20k
VIN
50mV/div
VOUT
50mV/div
10
s/div
Figure 6. MAX492 Voltage Follower with 1000pF Load
(RL = ∞)
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