AD8079 Dual 260 MHz Gain = +2.0 & +2.2 Buffer

The AD8079 is a dual, low power, high speed buffer designed to operate on ±5 V supplies. The AD8079's pinout offers excellent input and output isolation compared to the traditional dual amplifier pin configuration. With two ac ground pins separating both the inputs and outputs, the AD8079 achieves very low crosstalk of less than -70 dB at 5 MHz.

Additionally, the AD8079 contains gain setting resistors factory set at G = +2.0 (A grade) or Gain = +2.2 (B grade) allowing circuit configurations with minimal external components. The B grade gain of +2.2 compensates for gain loss through a system by providing a single-point trim. Using active laser trimming of these resistors, the AD8079 guarantees tight control of gain and channel-channel gain matching. With its performance and figuration, the AD8079 is well suited for driving differential cables and transformers. Its low distortion and fast settling are ideal for buffering high speed dual or differential A-to-D converters.

The AD8079 features a unique transimpedance linearization circuitry. This allows it to drive video loads with excellent differential gain and phase performance of 0.01% and 0.02° on only 50 mW of power per amplifier. It features gain flatness of 0.1 dB to 50 MHz. This makes the AD8079 ideal for professional video electronics such as cameras and video switchers.

The AD8079 offers low power of 5 mA/amplifier (VS = ±5 V) and can run on a single +12 V power supply while delivering over 70 mA of load current. All of this is offered in a small 8-pin SOIC package. These features make this amplifier ideal for portable and battery powered applications where size and power are critical.

The outstanding bandwidth of 260 MHz along with 800 V/µs of slew rate make the AD8079 useful in many general purpose high speed applications where dual power supplies of ±3 V to ±6 V are required.

The AD8079 is available in the industrial temperature range of -40°C to +85°C.

产品特点和性能优势
  • Factory Set Gain
    Gain of 2.2 Compensates for System Gain Loss
    Minimizes External Components
    Tight Control of Gain and Gain Matching (0.1%)
  • Optimum Dual Pinout
    Simplifies PCB Layout
    Low Crosstalk of -70dB @ 5MHz
  • Excellent Video Specifications (RL=150 Ω)
    Gain Flatness 0.1dB to 50MHz
    0.01% Differential Gain Error
    0.02° Differential Phase Error
  • Low Power of 50 mW/Amplifier (5mA)
  • High Speed and Fast Settling
    260MHz, -3dB Bandwidth
    750 V/µs Slew Rate (2 V Step), 800 V/µs 4 V Step)
    40 ns Settling Time to 0.1% (2V Step)
  • Low Distortion of -65dBc THD, fc=5MHz
  • High Output Drive of Over 70mA
  • 放大器
    音频和视频
    AD8079 SPICE Macro-Model
    数据手册
    文档备注
    AD8079: Dual 260 MHz Gain = +2.0 & +2.2 Buffer Data Sheet (Rev. A)PDF 348 kB
    应用笔记
    文档备注
    AN-402: Replacing Output Clamping Op Amps with Input Clamping AmpsPDF 55 kB
    AN-581: Biasing and Decoupling Op Amps in Single Supply Applications (Rev. 0)PDF 166 kB
    AN-356: User's Guide to Applying and Measuring Operational Amplifier SpecificationsPDF 538 kB
    AN-417: Fast Rail-to-Rail Operational Amplifiers Ease Design Constraints in Low Voltage High Speed SystemsPDF 228 kB
    AN-402: 以输入箝位放大器取代输出箝位运算放大器 (Rev. 0)PDF 294 kB
    AN-417: 在低压高速系统中利用快速轨到轨运算放大器减少设计限制 (Rev. 0)PDF 228 kB
    AN-356: 用户指南:运算放大器规格参数的应用和测量 (Rev. 0)PDF 538 kB
    AN-581: 单电源应用中的偏置和去耦运算放大器 (Rev. 0)PDF 0
    AN-649: Using the Analog Devices Active Filter Design Tool (Rev. 0)PDF 5.3 M
    订购信息
    产品型号封装包装数量温度范围美金报价 100-499美金报价 1000+RoHS
    AD8079AR 量产8 ld SOICOTH 98-40 至 85至7.26.53N
    AD8079ARZ 量产8 ld SOICOTH 98-40 至 85至5.054.56Y
    AD8079ARZ-REEL 量产8 ld SOICREEL 2500-40 至 85至04.56Y
    AD8079ARZ-REEL7 量产8 ld SOICREEL 1000-40 至 85至5.054.56Y
    AD8079BRZ 量产8 ld SOICOTH 98-40 至 85至6.575.93Y
    AD8079BRZ-REEL 量产8 ld SOICREEL 2500-40 至 85至05.93Y
    AD8079BRZ-REEL7 量产8 ld SOICREEL 1000-40 至 85至6.575.93Y
    参考资料
    AD8079: Dual 260 MHz Gain = +2.0 & +2.2 Buffer Data Sheet (Rev. A) ad8079
    AD8079A SPICE Macro-Model ad8079
    AD8079B SPICE Macro-Model ad8079
    AN-402: Replacing Output Clamping Op Amps with Input Clamping Amps ad829
    AN-581: Biasing and Decoupling Op Amps in Single Supply Applications (Rev. 0) ad829
    AN-356: User's Guide to Applying and Measuring Operational Amplifier Specifications ad8350
    AN-417: Fast Rail-to-Rail Operational Amplifiers Ease Design Constraints in Low Voltage High Speed Systems ad829
    AN-402: 以输入箝位放大器取代输出箝位运算放大器 (Rev. 0) ad829
    AN-417: 在低压高速系统中利用快速轨到轨运算放大器减少设计限制 (Rev. 0) ad829
    AN-356: 用户指南:运算放大器规格参数的应用和测量 (Rev. 0) ad8350
    AN-581: 单电源应用中的偏置和去耦运算放大器 (Rev. 0) ad829
    AN-649: Using the Analog Devices Active Filter Design Tool (Rev. 0) ad8350
    MT-060: Choosing Between Voltage Feedback and Current Feedback Op Amps ad829
    MT-032:理想的电压反馈型(VFB)运算放大器 ad829
    MT-059: 补偿输入电容对电流电压转换器所用电压反馈和电流反馈型运算放大器的影响 ad9631
    MT-058: 反馈电容对VFB和CFB运算放大器的影响 ad829
    MT-056: 高速电压反馈运算放大器 ad829
    MT-053:运算放大器失真:HD、THD、THD + N、IMD、SFDR、MTPR ad829
    MT-052:运算放大器噪声指数:不要被误导 ad829
    MT-050: 二阶系统的运算放大器总输出噪声计算 ad9631
    MT-049:单极点系统的运算放大器总输出噪声计算 ad829
    MT-048:运算放大器噪声关系:1/f噪声、均方根(RMS)噪声与等效噪声带宽 ad829
    MT-047:运算放大器噪声 ad829
    MT-033:电压反馈型运算放大器的增益和带宽 ad829
    MT-032: Ideal Voltage Feedback (VFB) Op Amp ad829
    High Speed Amplifiers Selection Table ad8138