参数资料
| 型号： | TLV2262AIDG4 |
| 厂商： | Texas Instruments |
| 文件页数： | 33/64页 |
| 文件大小： | 0K |
| 描述： | IC OPAMP GP R-R 710KHZ 8SOIC |
| 标准包装： | 75 |
| 系列： | LinCMOS™ |
| 放大器类型： | 通用 |
| 电路数： | 2 |
| 输出类型： | 满摆幅 |
| 转换速率： | 0.55 V/µs |
| 增益带宽积： | 710kHz |
| 电流 - 输入偏压： | 1pA |
| 电压 - 输入偏移： | 300µV |
| 电流 - 电源： | 400µA |
| 电流 - 输出 / 通道： | 50mA |
| 电压 - 电源，单路/双路(±)： | 2.7 V ~ 8 V，±1.35 V ~ 4 V |
| 工作温度： | -40°C ~ 125°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： | 管件 |
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TLV226x, TLV226xA
Advanced LinCMOS RAILTORAIL
OPERATIONAL AMPLIFIERS
SLOS186C FEBRUARY 1997 REVISED AUGUST 2006
39
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
driving large capacitive loads
The TLV226x is designed to drive larger capacitive loads than most CMOS operational amplifiers. Figure 51
and Figure 52 illustrate its ability to drive loads greater than 400 pF while maintaining good gain and phase
margins (Rnull = 0).
A smaller series resistor (Rnull) at the output of the device (see Figure 61) improves the gain and phase margins
when driving large capacitive loads. Figure 51 and Figure 52 show the effects of adding series resistances of
10
, 20 , 50 , and 100 . The addition of this series resistor has two effects: the first is that it adds a zero
to the transfer function and the second is that it reduces the frequency of the pole associated with the output
load in the transfer function.
The zero introduced to the transfer function is equal to the series resistance times the load capacitance. To
calculate the improvement in phase margin, equation (1) can be used.
θ
m1 + tan
–1 2 ×π × UGBW × R
null ×
C
L
θ
m1 + improvement in phase margin
UGBW
+ unity-gain bandwidth frequency
R
null + output series resistance
C
L + load capacitance
(1)
Where :
The unity-gain bandwidth (UGBW) frequency decreases as the capacitive load increases (see Figure 53). To
use equation 1, UGBW must be approximated from Figure 53.
Using equation 1 alone overestimates the improvement in phase margin as illustrated in Figure 59. The
overestimation is caused by the decrease in the frequency of the pole associated with the load, providing
additional phase shift and reducing the overall improvement in phase margin. The pole associated with the load
is reduced by the factor calculated in equation 2.
F
+
1
) gm × R
null
F
+ factor reducing frequency of pole
gm + small-signal output transconductance (typically 4.83 × 10
–3 mhos)
R
null + output series resistance
(2)
Where :
For the TLV226x, the pole associated with the load is typically 7 MHz with 100-pF load capacitance. This value
varies inversely with CL: at CL = 10 pF, use 70 MHz, at CL = 1000 pF, use 700 kHz, and so on.
Reducing the pole associated with the load introduces phase shift, thereby reducing phase margin. This results
in an error in the increase in phase margin expected by considering the zero alone (equation 1). Equation 3
approximates the reduction in phase margin due to the movement of the pole associated with the load. The
result of this equation can be subtracted from the result of the equation 1 to better approximate the improvement
in phase margin.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TLV2262AIDR | 功能描述:运算放大器 - 运放 Advanced LinCMOS Rail-To-Rail Dual 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 |
| TLV2262AIDRG4 | 功能描述:运算放大器 - 运放 Advanced LinCMOS Rail-To-Rail Dual 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 |
| TLV2262AIP | 功能描述:运算放大器 - 运放 LiNCMOS R/R 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 |
| TLV2262AIPE4 | 功能描述:运算放大器 - 运放 Advanced LinCMOS Rail-To-Rail Dual 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 |
| TLV2262AIPW | 功能描述:运算放大器 - 运放 Advanced LinCMOS Rail-To-Rail Dual 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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