LMH6646

正在供货

双通道 2.7V 650µA 55MHz 轨到轨输入和输出放大器

可提供此产品的更新版本

open-in-new 比较替代产品
功能优于比较器件,可直接替换
OPA2863 正在供货 双路低功耗 110MHz 12V 轨到轨输入和输出 (RRIO) 电压反馈放大器 Higher bandwidth (50 MHz), lower noise (5.9 nV/√Hz), lower offset (1.3 mV), lower offset drift (3.5 µV/C) and lower power consumption (0.7 mA)
OPA2863A 正在供货 双路、高精度、低功耗、105MHz、12V RRIO 电压反馈放大器 Higher bandwidth (50 MHz), lower noise (5.9 nV/√Hz), lower offset (95 µV), lower offset drift (0.4 µV/°C) and lower power consumption (0.75 mA)

产品详情

Architecture Voltage FB Number of channels 2 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 2.5 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 12 GBW (typ) (MHz) 40 BW at Acl (MHz) 55 Acl, min spec gain (V/V) 1 Slew rate (typ) (V/µs) 22 Vn at flatband (typ) (nV√Hz) 17 Vn at 1 kHz (typ) (nV√Hz) 17 Iq per channel (typ) (mA) 0.725 Vos (offset voltage at 25°C) (max) (mV) 3 Rail-to-rail In, Out Rating Catalog Operating temperature range (°C) -40 to 85 CMRR (typ) (dB) 84 Input bias current (max) (pA) 2000000 Offset drift (typ) (µV/°C) 5 Iout (typ) (mA) 20 2nd harmonic (dBc) 62 3rd harmonic (dBc) 72 Frequency of harmonic distortion measurement (MHz) 1
Architecture Voltage FB Number of channels 2 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 2.5 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 12 GBW (typ) (MHz) 40 BW at Acl (MHz) 55 Acl, min spec gain (V/V) 1 Slew rate (typ) (V/µs) 22 Vn at flatband (typ) (nV√Hz) 17 Vn at 1 kHz (typ) (nV√Hz) 17 Iq per channel (typ) (mA) 0.725 Vos (offset voltage at 25°C) (max) (mV) 3 Rail-to-rail In, Out Rating Catalog Operating temperature range (°C) -40 to 85 CMRR (typ) (dB) 84 Input bias current (max) (pA) 2000000 Offset drift (typ) (µV/°C) 5 Iout (typ) (mA) 20 2nd harmonic (dBc) 62 3rd harmonic (dBc) 72 Frequency of harmonic distortion measurement (MHz) 1
SOIC (D) 8 29.4 mm² 4.9 x 6 VSSOP (DGK) 8 14.7 mm² 3 x 4.9
  • (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
  • (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.

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.

下载 观看带字幕的视频 视频

技术文档

star =有关此产品的 TI 精选热门文档
未找到结果。请清除搜索并重试。
查看全部 7
类型 标题 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) 2014年 11月 25日
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 英语版 2018年 1月 31日
设计指南 High-Precision Reference Design for Buffering a DAC Signal 2017年 2月 3日
更多文献资料 用于显示屏的放大器 2013年 7月 8日
应用手册 AN-1515 A Comprehensive Study of the Howland Current Pump (Rev. A) 2013年 4月 26日
更多文献资料 Die D/S LMH6646 MDC 2.7V, 650µa, 55Mhz, Rail-Rail Input/Output Amp W/ Shutdown 2012年 9月 28日
EVM 用户指南 LMH730036 Evaluation Board User’s Guide 2012年 5月 6日

设计和开发

如需其他信息或资源,请点击以下任一标题进入详情页面查看(如有)。

评估板

LMH730123 — 用于采用 8 引脚 MSOP 封装的高速双路运算放大器的评估板

National Semiconductor offers this unpopulated Evaluation Board to aid in the evaluation and testing of high-speed Op Amp that are offered in the 8-Pin MSOP package. Resistors, capacitors, or any other surface-mount components can be easily mounted on this board in the desired circuit (...)

用户指南: PDF
TI.com 上无现货
仿真模型

LMH6646 PSPICE Model

SNOM139.ZIP (1 KB) - PSpice Model
计算工具

ANALOG-ENGINEER-CALC — 模拟工程师计算器

模拟工程师计算器旨在加快模拟电路设计工程师经常使用的许多重复性计算。该基于 PC 的工具提供图形界面,其中显示各种常见计算的列表(从使用反馈电阻器设置运算放大器增益到为稳定模数转换器 (ADC) 驱动器缓冲器电路选择合适的电路设计元件)。除了可用作单独的工具之外,该计算器还能够很好地与模拟工程师口袋参考书中所述的概念配合使用。
计算工具

VOLT-DIVIDER-CALC — Voltage divider calculation tool

The voltage divider calculation tool (VOLT-DIVIDER-CALC) quickly determines a set of resistors for a voltage divider. This KnowledgeBase JavaScript utility can be used to find a set of resistors for a voltage divider to achieve the desired output voltage. VOLT-DIVIDER-CALC can also be used to (...)
模拟工具

PSPICE-FOR-TI — 适用于 TI 设计和模拟工具的 PSpice®

PSpice® for TI 可提供帮助评估模拟电路功能的设计和仿真环境。此功能齐全的设计和仿真套件使用 Cadence® 的模拟分析引擎。PSpice for TI 可免费使用,包括业内超大的模型库之一,涵盖我们的模拟和电源产品系列以及精选的模拟行为模型。

借助 PSpice for TI 的设计和仿真环境及其内置的模型库,您可对复杂的混合信号设计进行仿真。创建完整的终端设备设计和原型解决方案,然后再进行布局和制造,可缩短产品上市时间并降低开发成本。

在 PSpice for TI 设计和仿真工具中,您可以搜索 TI (...)
模拟工具

TINA-TI — 基于 SPICE 的模拟仿真程序

TINA-TI 提供了 SPICE 所有的传统直流、瞬态和频域分析以及更多。TINA 具有广泛的后处理功能,允许您按照希望的方式设置结果的格式。虚拟仪器允许您选择输入波形、探针电路节点电压和波形。TINA 的原理图捕获非常直观 - 真正的“快速入门”。

TINA-TI 安装需要大约 500MB。直接安装,如果想卸载也很容易。我们相信您肯定会爱不释手。

TINA 是德州仪器 (TI) 专有的 DesignSoft 产品。该免费版本具有完整的功能,但不支持完整版 TINA 所提供的某些其他功能。

如需获取可用 TINA-TI 模型的完整列表,请参阅:SpiceRack - 完整列表 

需要 HSpice (...)

用户指南: PDF
英语版 (Rev.A): PDF
封装 引脚 CAD 符号、封装和 3D 模型
SOIC (D) 8 Ultra Librarian
VSSOP (DGK) 8 Ultra Librarian

订购和质量

包含信息:
  • RoHS
  • REACH
  • 器件标识
  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
  • MTBF/时基故障估算
  • 材料成分
  • 鉴定摘要
  • 持续可靠性监测
包含信息:
  • 制造厂地点
  • 封装厂地点

支持和培训

视频