STDA026 March   2026 AFE7950-SP

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
    1. 1.1 Overview of Modern Satellite Communication Systems
    2. 1.2 Presentation of the AFE7950 as an Integrated RF Design
  5. 2Technical Advantages of AFE7950 for SATCOM Applications
    1. 2.1 Spectral Flexibility and Agility
      1. 2.1.1 Wide Frequency Range (600MHz - 12GHz)
      2. 2.1.2 Configurable Bandwidth
      3. 2.1.3 Significance of Frequency Hopping for SATCOM
      4. 2.1.4 JESD204B and JESD204C Flexibility
        1. 2.1.4.1 Subclass 1 Synchronization
        2. 2.1.4.2 Lane Reduction for Power Savings
        3. 2.1.4.3 Recommended JESD Encoding
    2. 2.2 Advantages for SATCOM System Design
    3. 2.3 Radiation Tolerance
      1. 2.3.1 AFE7950-SP: Space-Qualified Version
        1. 2.3.1.1 Total Ionizing Dose (TID)
        2. 2.3.1.2 Single Event Latch-Up (SEL)
        3. 2.3.1.3 Single Event Functional Interrupt (SEFI)
        4. 2.3.1.4 Radiation Lot Acceptance Testing
        5. 2.3.1.5 Outgassing ASTM E595 Compliance
      2. 2.3.2 Benefits for SATCOM
    4. 2.4 Power Consumption Optimization
      1. 2.4.1 Power Mode Configuration
        1. 2.4.1.1 Rx Only Mode
          1. 2.4.1.1.1 Use Case of Rx Mode
          2. 2.4.1.1.2 Benefits of Rx Mode
        2. 2.4.1.2 Typical Operation Mode
        3. 2.4.1.3 4T4R FDD Mode
          1. 2.4.1.3.1 4T4R FDD Mode Use Case
      2. 2.4.2 Power-Saving Strategies
        1. 2.4.2.1 Low Power Operation Mode
          1. 2.4.2.1.1 Standby Mode
          2. 2.4.2.1.2 Sleep Mode
      3. 2.4.3 Benefits of Sleep and Standby Mode for SATCOM
  6. 3Conclusion
  7. 4References

2.4.1.3 4T4R FDD Mode

4T4R FDD mode has all four ADCs and all four DACs enabled, operating at full sampling rates of 3 GSPS and 12 GSPS, respectively. In this configuration, the device reaches a peak consumption of approximately 10.640W.

Additional features of this mode include:

  • Sustains a high data rate through a fully populated JESD interface (eight lanes for the transmit and four for the receive)
  • Internal digital processing blocks operate at full capacity to handle interpolation and decimation for bandwidth shaping
Table 2-7 Electrical Characteristics of 4T4R FDD Mode Typical values at TA = +25°C, full temperature range is TA,MIN = -40°C to TJ,MAX = +110°C; TX Input Rate = 491.52MSPS, fDAC = 8847.36MSPS interleave mode; fADC = 2949.12MSPS; nominal power supplies; 1 tone at -1 dBFS; DSA Attenuation =0dB; SerDes rate = 24.33Gbps; unless otherwise noted.
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
IVDD1P8 Group 3A: VDD1P8FB + VDD1P8RX + VDD1P8TX Mode 11d: FDD 4T4RSingle Band: 8x Int, RX uses FBTX/FB/RX Rate = 1474.56Msps fDAC = 11796.48MSPS fADC = 2949.12MSPS fTX = fRX = 8GHz 64/66 coding, 24.33Gbps TX: 8-8-2-1, FB/RX: 4-4-4-2 1260 mA
Group 3B: VDD1P8FBCLK + VDD1P8RXCLK + VDD1P8TXDAC + VDD1P8GPIO + VDDA1P8 940 mA
Group 3C: VDD1P8PLL + VDD1P8PLLVCO 73 mA
IVDD1P2 Group 2A: VDD1P2FB + VDD1P2RX 630 mA
Group 2B: VDD1P2TXCLK + VDD1P2TXENC 1480 mA
Group 2C: VDD1P2FBCML + VDD1P2RXCML + VDD1P2PLLCLKREF 78 mA
IVDD0P9 Group 1A: DVDD0P9 + VDDT0P9 4200 mA
Pdiss Power Dissipation 10640 mW