可提供此产品的更新版本
功能优于比较器件，可直接替换。
LMH6645
- (VS = 2.7V, TA = 25°C, RL = 1kΩ to V+/2, AV = +1.
Typical Values Unless Specified. - −3dB BW 55 MHz
- Supply Voltage Range 2.5 V to 12 V
- Slew Rate 22 V/µs
- Supply Current 650 µA/channel
- Output Short Circuit Current 42 mA
- Linear Output Current ±20 mA
- Input Common Mode Voltage 0.3 V Beyond Rails
- Output Voltage Swing 20 mV from Rails
- Input Voltage Noise 17 nV/√Hz
- Input Current Noise 0.75 pA/√Hz
The LMH6645 (single) and LMH6646 (dual), rail-to-rail input and output voltage feedback amplifiers, offer high speed (55 MHz), and low voltage operation (2.7 V) in addition to micro-power shutdown capability (LMH6647, single).
Input common mode voltage range exceeds either supply by 0.3 V, enhancing ease of use in multitude of applications where previously only inferior devices could be used. Output voltage range extends to within 20 mV of either supply rails, allowing wide dynamic range especially in low voltage applications. Even with low supply current of 650 µA/amplifier, output current capability is kept at a respectable ±20 mA for driving heavier loads. Important device parameters such as BW, Slew Rate and output current are kept relatively independent of the operating supply voltage by a combination of process enhancements and design architecture.
In portable applications, the LMH6647 provides shutdown capability while keeping the turn-off current to less than 50 µA. Both turn-on and turn-off characteristics are well behaved with minimal output fluctuations during transitions. This allows the part to be used in power saving mode, as well as multiplexing applications. Miniature packages (SOT-23, VSSOP-8, and SOIC-8) are further means to ease the adoption of these low power high speed devices in applications where board area is at a premium.
技术文档
| 顶层文档 | 类型 | 标题 | 格式选项 | 下载最新的英语版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 数据表 | LMH664x 2.7 V, 650 uA, 55 MHz, Rail-to-Rail I/O Amplifiers w/Shutdown Option 数据表 (Rev. D) | PDF | HTML | 2014-11-25 | ||
| 电子书 | The Signal e-book: 有关运算放大器设计主题的博客文章汇编 | PDF | HTML | 英语版 | PDF | HTML | 2018-1-31 | |
| 设计指南 | High-Precision Reference Design for Buffering a DAC Signal | 2017-2-3 | ||||
| 更多文献资料 | 用于显示屏的放大器 | 2013-7-8 | ||||
| 应用手册 | AN-1515 A Comprehensive Study of the Howland Current Pump (Rev. A) | 2013-4-26 |
设计与开发
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