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參數(shù)資料
| 型號(hào)： | MAX4257EUA+ |
| 廠(chǎng)商： | Maxim Integrated Products |
| 文件頁(yè)數(shù)： | 4/16頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC OP AMP R-R SGL LN 8MSOP |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 50 |
| 放大器類(lèi)型： | 通用 |
| 電路數(shù)： | 2 |
| 輸出類(lèi)型： | 推挽式，滿(mǎn)擺幅 |
| 轉(zhuǎn)換速率： | 2.1 V/µs |
| 增益帶寬積： | 22MHz |
| 電流 - 輸入偏壓： | 1pA |
| 電壓 - 輸入偏移： | 70µV |
| 電流 - 電源： | 420µA |
| 電流 - 輸出 / 通道： | 68mA |
| 電壓 - 電源，單路/雙路(±)： | 2.4 V ~ 5.5 V，±1.2 V ~ 2.75 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類(lèi)型： | 表面貼裝 |
| 封裝/外殼： | 8-TSSOP，8-MSOP（0.118"，3.00mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 8-uMAX |
| 包裝： | 管件 |
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UCSP, Single-Supply, Low-Noise,
Low-Distortion, Rail-to-Rail Op Amps
12
Maxim Integrated
MAX4249–MAX4257
These devices maintain stability while driving loads up
to 400pF. To drive higher capacitive loads, place a
small isolation resistor in series between the output of
the amplifier and the capacitive load (Figure 5). This
resistor improves the amplifier’s phase margin by iso-
lating the capacitor from the op amp’s output.
Reference Figure 6 to select a resistance value that will
ensure a load capacitance that limits peaking to <2dB
(25%). For example, if the capacitive load is 1000pF,
the corresponding isolation resistor is 150". Figure 7
shows that peaking occurs without the isolation resis-
tor. Figure 8 shows the unity-gain bandwidth vs. capac-
itive load for the MAX4250–MAX4254.
Power Supplies and Layout
The MAX4249–MAX4257 operate from a single 2.4V to
5.5V power supply or from dual supplies of ±1.20V to
±2.75V. For single-supply operation, bypass the power
supply with a 0.1F ceramic capacitor placed close to
the VDD pin. If operating from dual supplies, bypass
each supply to ground.
Good layout improves performance by decreasing the
amount of stray capacitance and noise at the op amp’s
inputs and output. To decrease stray capacitance, min-
imize PC board trace lengths and resistor leads, and
place external components close to the op amp’s pins.
160
140
0
10
10,000
60
20
40
120
100
80
CAPACITIVE LOADING (pF)
1000
100
SHADED AREA INDICATES
STABLE OPERATION
WITH NO NEED FOR
ISOLATION RESISTOR.
NOTE: USING AN ISOLATION RESISTOR REDUCES PEAKING.
R ISO
(Ω
)
4.5
3.5
4.0
0
10
10,000
2.0
3.0
2.5
1.0
0.5
1.5
CAPACITIVE LOAD (pF)
UNITY-GAIN
BANDWIDTH
(MHz)
1000
100
VDD = 3V
SHADED AREA INDICATES
STABLE OPERATION
WITH NO NEED FOR
ISOLATION RESISTOR.
NOTE: RISO CHOSEN FOR PEAKING <2dB.
25
20
0
10
10,000
15
5
10
CAPACITIVE LOAD (pF)
PEAKING
(dB)
1000
100
MAX4250–MAX4254 (AV = 1)
MAX4249/MAX4255–MAX4257 (AV = 10)
RISO = 0
SHADED AREA INDICATES
STABLE OPERATION
WITH NO NEED FOR
ISOLATION RESISTOR.
Figure 6. Isolation Resistance vs. Capacitive Loading to
Minimize Peaking (<2dB)
Figure 7. Peaking vs. Capacitive Load
Figure 8. MAX4250–MAX4254 Unity-Gain Bandwidth vs.
Capacitive Load
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相關(guān)代理商/技術(shù)參數(shù) |
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| MAX4257EUA+ | 功能描述:運(yùn)算放大器 - 運(yùn)放 Low-Distortion Rail-Rail Op Amp 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 |
| MAX4257EUA+T | 功能描述:運(yùn)算放大器 - 運(yùn)放 Low-Distortion Rail-Rail Op Amp 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 |
| MAX4257EUA-T | 功能描述:運(yùn)算放大器 - 運(yùn)放 Low-Distortion Rail-Rail Op Amp 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 |
| MAX4258ESA | 功能描述:視頻放大器 Integrated Circuits (ICs) RoHS:否 制造商:ON Semiconductor 通道數(shù)量:4 電源類(lèi)型: 工作電源電壓:3.3 V, 5 V 電源電流: 最小工作溫度: 最大工作溫度: 封裝 / 箱體:TSSOP-14 封裝:Reel |
| MAX4258ESA/GH9 | 功能描述:視頻放大器 RoHS:否 制造商:ON Semiconductor 通道數(shù)量:4 電源類(lèi)型: 工作電源電壓:3.3 V, 5 V 電源電流: 最小工作溫度: 最大工作溫度: 封裝 / 箱體:TSSOP-14 封裝:Reel |
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