MAX3517

CATV上行放大器

具有业内最低功耗的新型电缆调制解调上行放大器


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说明

The MAX3514/MAX3516/MAX3517 programmable-gain amplifiers are designed for use in CATV upstream applications. The MAX3514/MAX3517 drive up to +61dBmV (QPSK) into a 75Ω load when driven with a +34dBmV nominal input signal. The MAX3516 drives up to +64dBmV (QPSK). Both input and output ports are differential, requiring that an external balun be used at the output port. The variable gain feature provides greater than 56dB of dynamic range, which is controlled by an SPI™ 3-wire interface. Gain control is available in 0.5dB steps. The devices operate over a frequency range of 5MHz to 65MHz.

The MAX3514 is a pin-for-pin compatible upgrade for the MAX3510. Like the MAX3510, the MAX3514 is internally matched for use with a 2:1 (voltage ratio) balun. The MAX3517 utilizes an external output resistor for greater load-matching flexibility, and offers the same performance as the MAX3514. The MAX3516 is a higher power version of the MAX3514 with 3dB more gain and output power capability, and is offered in a smaller thermally enhanced TSSOP-EP package.

These devices operate from a single +5VDC supply and draw 120mA during transmit (100% duty cycle, +61dBmV out). The MAX3516 can be operated at up to +9VDC supply for improved harmonic distortion performance. The bias current is automatically adjusted based on the output level to increase efficiency. Additionally, the devices are shut off between bursts to minimize noise and save power while still maintaining a match at the output port. Shutdown mode disables all circuitry and reduces current consumption to 10µA (typ).

The MAX3514/MAX3517 are available in a 20-pin QSOP package and the MAX3516 is available in a 20-pin TSSOP-EP package. All devices operate in the extended industrial temperature range (-40°C to +85°C).
MAX3514、MAX3516、MAX3517:典型工作电路 MAX3514、MAX3516、MAX3517:典型工作电路 放大+

关键特性

  • Accurate Gain Control
  • Gain Programmable in 0.5dB Steps
  • 56dB of Gain Control Range
  • -55dBc Harmonic Distortion at 65MHz Input
  • Low Burst On/Off Transient
  • High Efficiency:
    • 35mA at +34dBmV Out
    • 8mA Transmit Disable Mode

应用

  • CATV状态监视
  • DOCSIS®/EuroDOCSIS™与DVB线缆调制解调器
  • OpenCable™机顶盒
  • 线缆电话

技术资料

设计指南 5100 RF和混合信号PCB的一般布局指南
设计指南 2866 将50Ω的S参数转换成75Ω的S参数

质量和环境数据

申请可靠性报告: MAX3517 
无铅封装的锡(Sn)晶须报告
型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C  

备注: 通过技术手段对故障率进行汇总,并映射到相关的材料部件号。 故障率与被测件的数量密切相关。

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