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| 型号： | MAX412ESA+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 2/13页 |
| 文件大小： | 0K |
| 描述： | IC OPAMP LN LV PREC 28MHZ 8-SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 放大器类型： | 通用 |
| 电路数： | 2 |
| 转换速率： | 4.5 V/µs |
| 增益带宽积： | 28MHz |
| 电流 - 输入偏压： | 80nA |
| 电压 - 输入偏移： | 120µV |
| 电流 - 电源： | 2.5mA |
| 电流 - 输出 / 通道： | 35mA |
| 电压 - 电源，单路/双路(±)： | 4.8 V ~ 10.5 V，±2.4 V ~ 5.25 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 带卷 (TR) |
MAX410/MAX412/MAX414
Single/Dual/Quad, 28MHz, Low-Noise,
Low-Voltage, Precision Op Amps
10
______________________________________________________________________________________
Tech measures input-referred noise. For the circuit in
Figure 5, assuming Rp is approximately equal to Rn
and the measurement is taken with the Quan Tech
model 5173, the equation simplifies to:
Input Protection
To protect amplifier inputs from excessive differential
input voltages, most modern op amps contain input
protection diodes and current-limiting resistors. These
resistors increase the amplifier’s input-referred noise.
They have not been included in the MAX410/MAX412/
MAX414, to optimize noise performance. The MAX410/
MAX412/MAX414 do contain back-to-back input pro-
tection diodes which will protect the amplifier for differ-
ential input voltages of ±0.1V. If the amplifier must be
protected from higher differential input voltages, add
external current-limiting resistors in series with the op
amp inputs to limit the potential input current to less
than 20mA.
Capacitive-Load Driving
Driving large capacitive loads increases the likelihood
of oscillation in amplifier circuits. This is especially true
for circuits with high loop gains, like voltage followers.
The output impedance of the amplifier and a capacitive
load form an RC network that adds a pole to the loop
response. If the pole frequency is low enough, as when
driving a large capacitive load, the circuit phase mar-
gin is degraded.
In voltage follower circuits, the MAX410/MAX412/
MAX414 remain stable while driving capacitive loads
as great as 3900pF (see Figures 6a and 6b).
When driving capacitive loads greater than 3900pF,
add an output isolation resistor to the voltage follower
circuit, as shown in Figure 7a. This resistor isolates the
load capacitance from the amplifier output and restores
the phase margin. Figure 7b is a photograph of the
response of a MAX410/MAX412/MAX414 driving a
0.015F load with a 10
isolation resistor
The capacitive-load driving performance of the
MAX410/MAX412/MAX414 is plotted for closed-loop
gains of -1V/V and -10V/V in the % Overshoot vs.
Capacitive Load graph in the
Typical Operating
Characteristics.
Feedback around the isolation resistor RI increases the
accuracy at the capacitively loaded output (see Figure 8).
The MAX410/MAX412/MAX414 are stable with a 0.01F
load for the values of RI and CF shown. In general, for
decreased closed-loop gain, increase RI or CF. To drive
larger capacitive loads, increase the value of CF.
i
e
AHz
n
no
2
-20
3
- (1.64 10 )(20 10 )
(20
10 )
=
××
[]
×
/
Figure 5. Current-Noise Test Circuit
100
909
+5V
0.022
F
Rp
10k
D.U.T
-5V
eno
MAX410
MAX412
MAX414
Rn
10k
0.022
F
Figure 6a. Voltage Follower Circuit with 3900pF Load
Rf
499
D.U.T
VOUT
MAX410
MAX412
MAX414
3900pF
VIN
Figure 6b. Driving 3900pF Load as Shown in Figure 6a
1
s/div
INPUT
1V/div
OUTPUT
1V/div
GND
VS =
±5V
TA = +25
°C
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX412ESA-TG068 | 制造商:Maxim Integrated Products 功能描述:- Tape and Reel |
| MAX412MJA | 功能描述:精密放大器 RoHS:否 制造商:Maxim Integrated 每芯片的通道数量: 输入补偿电压:0.25 mV at +/- 5 V 输入电压范围（最大值）: 安装风格: 封装 / 箱体:SOIC-8 Narrow 封装:Tube |
| MAX412MSA/PR | 制造商:Maxim Integrated Products 功能描述:SINGLE/DUAL/QUAD, 28MHZ, LOW-NOISE, LOW-VOLTAGE, PRECISION O - Rail/Tube |
| MAX4130 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply, Rail-to-Rail I/O Op Amps |
| MAX4130EUK | 制造商:Maxim Integrated Products 功能描述:NON BOOK, NC/NR & QUOTE REQ'D - Bulk |
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