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OPA4684 四路低功耗电流反馈运算放大器

The OPA4684 provides a new level of performance in low-power, wideband, current-feedback (CFB) amplifiers. This CFBPLUS amplifier is among the first to use an internally closed-loop input buffer stage that enhances performance significantly over earlier low-power CFB amplifiers. This new architecture provides many of the benefits of a more ideal CFB amplifier while retaining the benefits of very low power operation. 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.


OPA4684
Iq per channel(Max)(mA) 7.8
Slew Rate(Typ)(V/us) 750
GBW(Typ)(MHz) 1900
Io(Typ)(mA) 120
Vs(Min)(V) 5
Vs(Max)(V) 12
Number of Channels 4
Pin/Package 14SOIC, 14TSSOP
Acl, min stable gain(V/V) 1
BW @ Acl(MHz) 250
Diff Gain(%) 0.04
Diff Phase(deg) 0.02
Vio(Max)(mV) 4
THD (Fc=1 MHz)(Typ)(dB) -79
Settling Time (0.1%)(Typ)(ns)
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$) 3.30 | 1ku
Iib(Max)(nA) 15000
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) 52
Operating Temperature Range(C) -40 to 85
OPA4684 特性
OPA4684 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
OPA4684ID ACTIVE -40 to 85 3.95 | 1ku SOIC (D) | 14 50 | TUBE  
OPA4684IDG4 ACTIVE -40 to 85 3.95 | 1ku SOIC (D) | 14 50 | TUBE  
OPA4684IDR ACTIVE -40 to 85 3.30 | 1ku SOIC (D) | 14 2500 | LARGE T&R  
OPA4684IDRG4 ACTIVE -40 to 85 3.30 | 1ku SOIC (D) | 14 2500 | LARGE T&R  
OPA4684IPWTT ACTIVE -40 to 85 3.80 | 1ku TSSOP (PW) | 14 250 | SMALL T&R  
OPA4684IPWTTG4 ACTIVE -40 to 85 3.80 | 1ku TSSOP (PW) | 14 250 | SMALL T&R  
OPA4684 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
OPA4684ID Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR OPA4684ID OPA4684ID
OPA4684IDG4 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR OPA4684IDG4 OPA4684IDG4
OPA4684IDR Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR OPA4684IDR OPA4684IDR
OPA4684IDRG4 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR OPA4684IDRG4 OPA4684IDRG4
OPA4684IPWT Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR OPA4684IPWT OPA4684IPWT
OPA4684IPWTG4 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR OPA4684IPWTG4 OPA4684IPWTG4
OPA4684 应用技术支持与电子电路设计开发资源下载
  1. OPA4684 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. PowerPADTM 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)
OPA4684 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
OPA4684 评估模块 OPA4684EVM 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