OPA684 具有禁用功能的低功耗电流反馈运算放大器

The OPA684 provides a new level of performance in low-power, wideband, current-feedback (CFB) amplifiers. This CFBplus amplifier is the first to use an internally closed-loop input buffer stage that enhances performance significantly over earlier low-power CFB amplifiers. While retaining the benefits of very low power operation, this new architecture provides many of the benefits of a more ideal CFB amplifier. The closed-loop input stage buffer gives a very low and linearized impedance path at the inverting input to sense the feedback error current. This improved inverting input impedance retains exceptional bandwidth to much higher gains and improves harmonic distortion over earlier solutions limited by inverting input linearity.


OPA684
Iq per channel(Max)(mA) 3.9  
Slew Rate(Typ)(V/us) 820  
GBW(Typ)(MHz) 1900  
Io(Typ)(mA) 120  
Vs(Min)(V) 5  
Vs(Max)(V) 12  
Number of Channels 1  
Pin/Package 6SOT-23, 8SOIC  
Acl, min stable gain(V/V) 1  
BW @ Acl(MHz) 210  
Diff Gain(%) 0.04  
Diff Phase(deg) 0.02  
Vio(Max)(mV) 3.5  
THD (Fc=1 MHz)(Typ)(dB) -79  
Settling Time (0.1%)(Typ)(ns) 11  
Offset Voltage Drift (+/-)(Max)(uV/Degrees Celsius) 12  
Available Channels S, D, T, Q  
Vn at Flatband(Typ)(nV/rtHz) 3.7  
Approx. Price (US$) 1.35 | 1ku  
Iib(Max)(nA) 13000  
Noninverting Input Current Noise(pA/rtHz) 9.4  
2nd Harmonic(dBc) 80  
3rd Harmonic(dBc) 80  
@ MHz 5  
BW @ G=+2(MHz) 170  
0.1 dB BW Flatness(MHz) 19  
Inverting Input Current Noise(pA/rtHz) 17  
Crosstalk(-dB)  
Operating Temperature Range(C) -40 to 85
OPA684 特性
  • MINIMAL BANDWIDTH CHANGE VERSUS GAIN
  • > 120MHz BANDWIDTH TO GAIN > +10
  • LOW DISTORTION: < –78dBc at 5MHz
  • HIGH OUTPUT CURRENT: 120mA
  • SINGLE +5V TO +12V SUPPLY OPERATION
  • DUAL ±2.5 TO ±6.0V SUPPLY OPERATION
  • LOW SUPPLY CURRENT: 1.7mA
  • LOW SHUTDOWN CURRENT: 100µA
  • APPLICATIONS
    • LOW-POWER BROADCAST VIDEO DRIVERS
    • EQUALIZING FILTERS
    • SAW FILTER HIGH GAIN POST AMPLIFIERS
    • MULTICHANNEL SUMMING AMPLIFIERS
    • PROFESSIONAL CAMERAS
    • ADC INPUT DRIVERS
OPA684 芯片订购指南
器件 状态 温度 价格（美元） 封装 | 引脚 封装数量 | 封装载体 丝印标记
OPA684ID ACTIVE -40 to 85 1.60 | 1ku SOIC (D) | 8 75 | TUBE  
OPA684IDBVR ACTIVE -40 to 85 1.35 | 1ku SOT-23 (DBV) | 6 3000 | LARGE T&R  
OPA684IDBVRG4 ACTIVE -40 to 85 1.35 | 1ku SOT-23 (DBV) | 6 3000 | LARGE T&R  
OPA684IDBVT ACTIVE -40 to 85 1.55 | 1ku SOT-23 (DBV) | 6 250 | SMALL T&R  
OPA684IDBVTG4 ACTIVE -40 to 85 1.55 | 1ku SOT-23 (DBV) | 6 250 | SMALL T&R  
OPA684IDG4 ACTIVE -40 to 85 1.60 | 1ku SOIC (D) | 8 75 | TUBE  
OPA684IDR ACTIVE -40 to 85 1.35 | 1ku SOIC (D) | 8 2500 | LARGE T&R  
OPA684IDRG4 ACTIVE -40 to 85 1.35 | 1ku SOIC (D) | 8 2500 | LARGE T&R  
OPA684 质量与无铅数据
器件 环保计划* 铅/焊球涂层 MSL 等级/回流焊峰 环保信息与无铅 (Pb-free) DPPM / MTBF / FIT 率
OPA684ID Green (RoHS & no Sb/Br)  CU NIPDAU  Level-2-260C-1 YEAR OPA684ID OPA684ID
OPA684IDBVR Green (RoHS & no Sb/Br)  CU NIPDAU  Level-2-260C-1 YEAR OPA684IDBVR OPA684IDBVR
OPA684IDBVRG4 Green (RoHS & no Sb/Br)  CU NIPDAU  Level-2-260C-1 YEAR OPA684IDBVRG4 OPA684IDBVRG4
OPA684IDBVT Green (RoHS & no Sb/Br)  CU NIPDAU  Level-2-260C-1 YEAR OPA684IDBVT OPA684IDBVT
OPA684IDBVTG4 Green (RoHS & no Sb/Br)  CU NIPDAU  Level-2-260C-1 YEAR OPA684IDBVTG4 OPA684IDBVTG4
OPA684IDG4 Green (RoHS & no Sb/Br)  CU NIPDAU  Level-2-260C-1 YEAR OPA684IDG4 OPA684IDG4
OPA684IDR Green (RoHS & no Sb/Br)  CU NIPDAU  Level-2-260C-1 YEAR OPA684IDR OPA684IDR
OPA684IDRG4 Green (RoHS & no Sb/Br)  CU NIPDAU  Level-2-260C-1 YEAR OPA684IDRG4 OPA684IDRG4
OPA684 应用技术支持与电子电路设计开发资源下载
  1. OPA684 数据资料 dataSheet 下载.PDF
  2. TI 德州仪器仪运算放大器 (Op Amp)产品选型与价格 . xls
  3. 所选封装材料的热学和电学性质 (PDF 645 KB)
  4. 高速数据转换 (PDF 1967 KB)
  5. 在 PSPICE 中使用德州仪器 (TI) SPICE 模型 (zhca088.HTM, 8 KB)
  6. PowerPAD™ Thermally Enhanced Package (slma002g.HTM, 8 KB)
  7. 运算放大器的单电源操作 (PDF 2174 KB)
  8. Tuning in Amplifiers (PDF 44 KB)
  9. Op Amp Performance Analysis (PDF 76 KB)
  10. An Error Analysis of the ISO102 in a Small Signal Measuring Application (PDF 29 KB)
  11. Level Shifting Signals with Differential Amplifiers (PDF 23 KB)
  12. Operational Amplifier Macromodels: A Comparison (PDF 59 KB)
OPA684 工具与软件
名称 型号 工具/软件类型
音频的快速搜索选择工具 AUDIO_SELECTION_TOOL 免费评估工具
OPA380 评估模块 OPA684EVM 开发电路板/EVM
用于音频转换器的软件驱动程序 CODECDRIVERS-SW 应用软件 
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