【问】TI的TLV2460
TI的TLV2460具有关断状态的单路低功耗轨至轨输入/输出运算放大器，提供了一个掉电控制端，是如何工作的？以及这个运放的应用领域是？
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shutdown function
Three members of the TLV246x family (TLV2460/3/5) have a shutdown terminal for conserving battery life in
portable applications. When the shutdown terminal is tied low, the supply current is reduced to 0.3 μA/channel,
the amplifier is disabled, and the outputs are placed in a high impedance mode. To enable the amplifier, the
shutdown terminal can either be left floating or pulled high. When the shutdown terminal is left floating, care
should be taken to ensure that parasitic leakage current at the shutdown terminal does not inadvertently place
the operational amplifier into shutdown. The shutdown terminal threshold is always referenced to VDD/2.
Therefore, when operating the device with split supply voltages (e.g. ±2.5 V), the shutdown terminal needs to
be pulled to VDD. (not GND) to disable the operational amplifier.
The amplifier’s output with a shutdown pulse is shown in Figures 22, 23, 24, and 25. The amplifier is powered
with a single 5-V supply and configured as a noninverting configuration with a gain of 5. The amplifier turnon
and turnoff times are measured from the 50% point of the shutdown pulse to the 50% point of the output
Three members of the TLV246x family (TLV2460/3/5) have a shutdown terminal for conserving battery life in
portable applications. When the shutdown terminal is tied low, the supply current is reduced to 0.3 μA/channel,
the amplifier is disabled, and the outputs are placed in a high impedance mode. To enable the amplifier, the
shutdown terminal can either be left floating or pulled high. When the shutdown terminal is left floating, care
should be taken to ensure that parasitic leakage current at the shutdown terminal does not inadvertently place
the operational amplifier into shutdown. The shutdown terminal threshold is always referenced to VDD/2.
Therefore, when operating the device with split supply voltages (e.g. ±2.5 V), the shutdown terminal needs to
be pulled to VDD. (not GND) to disable the operational amplifier.
The amplifier’s output with a shutdown pulse is shown in Figures 22, 23, 24, and 25. The amplifier is powered
with a single 5-V supply and configured as a noninverting configuration with a gain of 5. The amplifier turnon
and turnoff times are measured from the 50% point of the shutdown pulse to the 50% point of the output
waveform. The times for the single, dual, and quad are listed in the data tables.
这个吧
主要参数表
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@zhanghuawei
TLV2460是具关断状态的单路低功耗轨至轨输入/输出运算放大器，这个运算放大器有6.4MHz带宽和1.6V/μs压摆率，只有500μA的工作电流，低功耗的同时提供好的交流性能。它提供一个掉电控制端，那个模式运放是在一个超低电流模式（I=0.3μA/ch）。当掉电模式时，运算放大器的输出是高阻状态。在输入噪声电压11nV/√Hz,输入失调电压100μV时，直流应用也有好的表现。单电源供电电压2.7-6V，双电源供电电压±1.35-±3V,耗电很低，5V供电时输出电流能够达到80mA.6管脚是掉电模式控制端，置低电平有效，此时每个通道电流降低到0.3uA,运放此时无放大功能，输出高阻状态，不用此项功能时，将端口置高或者悬空处理.适用于手持便携式设备中高驱动的应用.
The operational amplifier has 6.4 MHz of bandwidth and 1.6 V/µs of slew rate with only 500 µA of supply current,
providing good ac performance with low power consumption.
Three members of the family offer a shutdown terminal,
which places the amplifier in an ultralow supply current mode (IDD = 0.3 µA/ch).
While in shutdown,
the operational-amplifier output is placed in a high-impedance state.
DC applications are also well served with an input noise voltage of 11 nV/
Hz and input offset voltage of 100 µV.
主要应用于汽车领域和自动控制领域。
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看看这个是否有用？
TLV246xA系列低功耗轨到轨输入输出关断运算放大器中文资料
TLV246xA系列低功耗轨到轨输入输出关断运算放大器中文资料 0
