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| 型号： | LMX321AUK+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 15/15页 |
| 文件大小： | 0K |
| 描述： | IC OP AMP LV R-R SGL SOT23-5 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 放大器类型： | 通用 |
| 电路数： | 1 |
| 输出类型： | 满摆幅 |
| 转换速率： | 1 V/µs |
| 增益带宽积： | 1.3MHz |
| 电流 - 输入偏压： | 18nA |
| 电压 - 输入偏移： | 1000µV |
| 电流 - 电源： | 120µA |
| 电流 - 输出 / 通道： | 28mA |
| 电压 - 电源，单路/双路(±)： | 2.3 V ~ 7 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SC-74A，SOT-753 |
| 供应商设备封装： | SOT-23-5 |
| 包装： | 标准包装 |
| 产品目录页面： | 1385 (CN2011-ZH PDF) |
| 其它名称： | LMX321AUK+TDKR |
Detailed Description
Input Protection Circuit
The LMX321/LMX358/LMX324’s inputs are protected
from large differential input voltages by internal 3.5k
series resistors and back-to-back triple diode stacks
across the inputs (Figure 1). For differential input volt-
ages (much less than 1.8V), input resistance is typically
3M. For differential input voltages greater than 1.8V,
input resistance is around 7k, and the input bias cur-
rent can be approximated by the following equation:
IBIAS = (VDIFF - 1.8V) / 7k
In the region where the differential input voltage
approaches 1.8V, input resistance decreases exponen-
tially from 3M to 7k as the diode block begins con-
ducting. Inversely, the bias current increases with the
same curve.
Rail-to-Rail Output Stage
The LMX321/LMX358/LMX324 drive 2k loads and still
typically swing within 40mV of the supply rails. Figure 2
shows the output voltage swing of the LMX321 config-
ured with AVCL = +2V/V.
Driving Capacitive Loads
Driving a capacitive load can cause instability in many
op amps, especially those with low quiescent current.
The LMX321/LMX358/LMX324 are unity-gain stable for
a range of capacitive loads to above 400pF. Figure 4
shows the response of the LMX321 with an excessive
capacitive load. Adding a series resistor between the
output and the load capacitor (Figure 5) improves the
circuit’s response by isolating the load capacitance
from the op amp’s output.
LMX321/LMX358/LMX324
Single/Dual/Quad, General-Purpose,
Low-Voltage, Rail-to-Rail Output Op Amps
_______________________________________________________________________________________
9
3.5k
Figure 1. Input Protection Circuit
200s/div
2.5V
-2.5V
VOUT
1V/div
VIN
2V/div
VCC = 2.5V, VEE = -2.5V, AVCL = 2V/V
Figure 2. Rail-to-Rail Output Swing
RL
CL
LMX321
LMX358
LMX324
Figure 3. Capacitive-Load-Driving Circuit
4s/div
2.6V
2.4V
2.6V
2.4V
VOUT
100mV/div
VIN
100mV/div
VCC = 5V, VEE = 0V, CL = 2.2nF, RL = 2k
Figure 4. Output With Excessive Capacitive Load
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LMX321AXK | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| LMX321AXK+ | 制造商:Maxim Integrated Products 功能描述:OP AMP SGL GP R-R O/P 7V 5PIN SC-70 - Rail/Tube |
| LMX321AXK+T | 功能描述:运算放大器 - 运放 Single GP Low-V Rail-Rail Output RoHS:否 制造商:STMicroelectronics 通道数量:4 共模抑制比（最小值）:63 dB 输入补偿电压:1 mV 输入偏流（最大值）:10 pA 工作电源电压:2.7 V to 5.5 V 安装风格:SMD/SMT 封装 / 箱体:QFN-16 转换速度:0.89 V/us 关闭:No 输出电流:55 mA 最大工作温度:+ 125 C 封装:Reel |
| LMX321AXK-T | 功能描述:运算放大器 - 运放 Single GP Low-V Rail-Rail Output RoHS:否 制造商:STMicroelectronics 通道数量:4 共模抑制比（最小值）:63 dB 输入补偿电压:1 mV 输入偏流（最大值）:10 pA 工作电源电压:2.7 V to 5.5 V 安装风格:SMD/SMT 封装 / 箱体:QFN-16 转换速度:0.89 V/us 关闭:No 输出电流:55 mA 最大工作温度:+ 125 C 封装:Reel |
| LMX321ICT | 功能描述:运算放大器 - 运放 Low PWR 120uA 2.7V 2.3 to 5.5V 1.3 MHz RoHS:否 制造商:STMicroelectronics 通道数量:4 共模抑制比（最小值）:63 dB 输入补偿电压:1 mV 输入偏流（最大值）:10 pA 工作电源电压:2.7 V to 5.5 V 安装风格:SMD/SMT 封装 / 箱体:QFN-16 转换速度:0.89 V/us 关闭:No 输出电流:55 mA 最大工作温度:+ 125 C 封装:Reel |
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