πR′CIN)-1, where R′ " />
參數(shù)資料
型號(hào): MAX4492AUD+T
廠商: Maxim Integrated Products
文件頁(yè)數(shù): 6/8頁(yè)
文件大小: 0K
描述: IC OPAMP QUAD R-R I/O 14-TSSOP
其它有關(guān)文件: Automotive Product Guide
產(chǎn)品培訓(xùn)模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)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: 10 V/µs
增益帶寬積: 10MHz
電流 - 輸入偏壓: 50pA
電壓 - 輸入偏移: 1500µV
電流 - 電源: 800µA
電流 - 輸出 / 通道: 50mA
電壓 - 電源,單路/雙路(±): 2.7 V ~ 5.5 V,±1.35 V ~ 2.75 V
工作溫度: -40°C ~ 125°C
安裝類型: 表面貼裝
封裝/外殼: 14-TSSOP(0.173",4.40mm 寬)
供應(yīng)商設(shè)備封裝: 14-TSSOP
包裝: 帶卷 (TR)
pole at frequency (2
πR′CIN)-1, where R′ is the parallel
combination of the gain-setting resistors for the invert-
ing or noninverting amplifier configuration (Figure 2). If
the pole frequency is less than or comparable to the
unity-gain bandwidth (10MHz), the phase margin will
be reduced, and the amplifier will exhibit degraded
AC performance through either ringing in the step
response or sustained oscillations. The pole frequency is
10MHz when R
′ = 3.2k. To maximize stability, R′ <3k
is recommended.
Applications that require rail-to-rail operation with mini-
mal loading (for small VDD - VOH and VOL - VSS) will
typically require R
′ values >3k. To improve step
response under these conditions, connect a small
capacitor Cf between the inverting input and output.
Choose Cf as follows:
Cf = 5(R / Rf) [pf]
where Rf is the feedback resistor and R is the gain-set-
ting resistor (Figure 2).
Figure 3 shows the step response for a noninverting
amplifier subject to R
′ = 4k with and without the Cf
feedback capacitor.
MAX4490/MAX4491/MAX4492
Low-Cost, High-Slew-Rate,
Rail-to-Rail I/O Op Amps in SC70
6
_______________________________________________________________________________________
Figure 1a. Output Source Current vs. Temperature
Figure 1b. Output Sink Current vs. Temperature
0
1
2
3
4
5
6
-40
-10
-25
5
20 35 50 65 80
125
95 110
TEMPERATURE (
°C)
OUTPUT
SOURCE
CURRENT
(mA)
VDD - VOH = 200mV
VDD - VOH = 100mV
VDD - VOH = 50mV
VDD = 5V
VDD = 2.7V
0
1
2
3
4
5
6
7
8
9
-40
-10
-25
5
20 35
65
50
80
110
95
125
TEMPERATURE (
°C)
OUTPUT
SINK
CURRENT
(mA)
VDD - VOH = 200mV
VDD - VOH = 100mV
VDD - VOH = 50mV
VDD = 5V
VDD = 2.7V
Figure 2. Inverting and Noninverting Amplifier with Feedback
Compensation
MAX4490
VIN
VOUT
R
′ = R || Rf
RfCf = RCIN
Rf
Cf
R
MAX4490
VIN
VOUT
R
′ = R || Rf
RfCf = RCIN
Rf
R
Cf
INVERTING
NONINVERTING
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